Inorganic-organic hybrid membrane is a new type of composite membrane which has been received much attention in recent years. The aim of this paper is to give a preliminary review on its preparation.

Electrochemical supercapacitors have been focused for their great capacitance, fast charging-discharging
with big current, and very long cycle life since they were born. In recent years, with their applications in national security science technology,
environmental reservation and so on, the studies on them have become one of the hot spots in the strategic field. In this paper, the authors outlined
the recent progress of research on electrode material for the electrochemical supercapacitors and classed them into four kinds: carbon materials series,
transition metal oxides series, electronically conducting organic polymers series and others. At the same time, the authors analyzed the development
orientations of the four kinds of electrode materials and brought out the research emphasis of the four kinds of electrochemical supercapacitors
electrode materials in future.

Recent status of microfabrication technology related to microelectromechanical systems (MEMS) is reviewed with
particular emphasis on the introduction of our newly developed three-dimensional microfabrication process using a micromachined silicon wafer
as a mold. By using the silicon molding processes, piezoelectric microrod arrays, thermoelectric microelement arrays and silicon carbide micro gas
turbine rotors have been successfully fabricated. Their microfabrication processes are described in detail to demonstrate the success of the
combination of silicon micromachining and materials processing techniques. The prospects for materials microfabrication in the fields of miniature
medical apparatus and portable microscale energy sources are given.

This article reviews the recent research progress on the application of mesoporous materials in several significant areas: catalytic application in organic and polymerization reactions, nanoreactor for polymerization, separation technology and enzyme immobilization, as well as nanocontainer or template for the fabrication of quantum structure. Outlook for further research in this area is also suggested.

Phosphorus-doped phenolic resin pyrolysis carbon was prepared by low temperature (600～1600℃)pyrolysis of thermoplastic phenolic resin containing
different amounts of phosphorus pentoxide after curing. Elemental composition and BET surface area of pyrolysis carbon were investigated. X-ray diffraction
pattern and constant-current charge-discharge properties of pyrolysis carbon were studied. The results show that the pyrolysis carbon microstructure is out of order
with the increasing of content phosphorus pentoxide, and BET surface area decreases firstly and then increases, otherwise, the discharge reversible capacity increases
firstly and then decreases. The discharge reversible capacity of pyrolytic carbon containing 9wt% phosphorus pentoxide is 528mA·h·g^-1 which is
higher than that of non-phosphorus doped phenolic pyrolysis resin carbon (230 mA·h·g^-1)

The powders of Ln_0.6Sr_0.4Fe_1-xCo_xO_3-δ(Ln=La, Pr, Nd, Sm and Gd) were obtained by solid state reactions. The cell
parameters of the specimens were analysised by XRD. The change in mass and oxygen stoichiometry of the samples as a function of temperature was determined
by TGA. The electrical conductivity of the sintered samples was measured as a function of temperature from 100 to 1000℃. It shows that the
electrical conductivity of all these samples is higher than 100S/cm, especially the electrical conductivity of Nd_0.6Sr_0.4Co_0.8Fe_0.2O_3-δ
can be up to 600S/cm, and all the samples possess good chemical compatibility with Ce_0.8Gd_0.2O_1.9 at 1200℃ for 24h.

The growth process of large SiC single crystals by PVT method was reported. The influences of growth
temperature, temperature gradient, the pressure in the growth chamber and impurity on the crystal growth and its quality were investigated. The large
6H-SiC single crystal with diameter of 45mm was successfully grown under optimum process conditions. The densities of micropipe and dislocation
were ca. 10³cm^-2 and 10⁴～10⁵cm^-2 respectively observed through chemical etching technique. The crystal was n-type semiconductor,
the carrier concentration and electron mobility were 10¹⁴cm^-3 and 90cm²V^-1S^-1 respectively.

SnO₂ nanorods with the rutile structure were prepared by annealing precursor powders?， which were produced by mixing three kinds of microemulsions (NP5，NP9, OP and
cyclohexane with the volume ratio 1:1:1:2) in the presence of salts such as SnCl₄，Na₂CO₃, NaCl respectively. The structure and morphology of SnO₂ nanorods
were investigated by transmission electron microscopy (TEM), selected area electron diffraction (SAED) and X-ray diffraction. The results showed that the diameter
and length of the as-prepared nanorods were 30～90nm and several micrometers respectively. The nanorods were perfect crystals. The mechanism of the formation
of SnO₂ nanorod was simply discussed in terms of the nucleation and growth process.

β-Si₃N₄ rod-like crystals were fabricated under high nitrogen pressure by using the Self-propagating High-temperature Synthesis method. The
effect of different amount of Y₂O₃ addition on the aspect ratio of β-Si₃N₄ rod-like crystals was studied. By using copper crucible absorbing the heat generated
by the exothermic reaction to quench the reaction, the growth morphology of β-Si₃N₄ in the different stages of the reaction was observed. The reaction courses were
also expounded. The results reveal that the optimum amount of Y₂O₃ addition is 2wt%～5wt%. Too much amount of Y₂O₃ addition could result in the
inhomogeneous growth and distribution of the crystals. By considering the morphology of the products, the growth mechanisms of β-Si₃N₄ rod-like crystal
are the results from the synergy of the VLS and VS.

Since some transition metal diborides have the same crystal structure of TiB2, they can react with TiB2 to form solid solution composites by adequate
technique. In this paper, the TiB2-NbB2 solid solution composite was prepared by hot pressing. The effects of additive content on mechanical properties of composite
were investigated. The microstructure analyses were made by EPMA, SEM and TEM. Results show that TiB2 can partly form solid solution with NbB2 and redound
to gain uniform grains, which results in the improvement of mechanical properties.

A buried hexagonal AlB₂-type YSi₂ layer was formed by metal vapor vacuum arc implantation of 100keV
yttrium ions with a dose of 1×10¹⁸ Y⁺ cm^-2 into (111) oriented silicon wafers. The heterostructures were analyzed by X-ray
diffraction(XRD), Rutherford backscattering spectroscopy(RBS) and the four-point probe technique. The concentration profiles of Y implanted
into p-Si (111) were determined by RBS. The results of XRD and RBS show that YSi₂ compound can be formed directly during the ion
implantation, and behave a tendency of tropism growth in the process of following irradiation with infrared ray. The measurements of in-situ
sheet resistance during infrared irradiation annealing show that the crystallization of the YSi occurs at 160℃, while YSi-YSi₂
phases transformation temperature is 240℃.

The MgAl₂O₄-LaCrO₃ insulator materials for the microwave sintering of electronic oxide
ceramics were made by the mixing of MgAl₂O₄ spinel materials with superior thermal properties and LaCrO₃ perovskites materials with high efficiency
absorption of microwave. The samples for microwave sintering were placed in the enclosure made of the insulator materials, and the outer insulator enclosure
were made of Al₂O₃ ceramic and Al₂O₃ fiber materials. Due to the thermal protection to the samples during the microwave sintering and especially
in the rapid cooling procedure, the design of this kind insulating system solved the problems of thermal cracks often occurred in the microwave sintering of many
electronic oxide ceramics, such as CoMnNiO series NTC ceramics, BaTiO₃ based PTC, LaCrO₃-based ceramics, and produce a homogeneous heating for the samples in
the microwave sintering, and gain crack-free and dense ceramic samples. The highest temperature of the MgAl₂O₄-LaCrO₃ insulator materials applied can be up to 1600℃.

The nano-crystalline BaTiO₃ was successfully synthesized by grinding the mixture of BaO and anatase
TiO₂ in a high-energy mill in nitrogen atmosphere and its mechanism was also discussed. The results suggested that the first stage of
mechanochemical treatment in initial 15h resulted in the occurrence of decreasing of crystalline size and distorting of crystalline lattice together
with amorphization in the mixture powder. BaTiO₃ phase was formed by solid reaction in the mixture powder mechanochemically for 15h to 30h
at the second stage. In the meantime the crystalline particle grew up. At the last stage of further treatment after 30h the crystalline size of
synthesized BaTiO₃ almost didn’t change, because the growing and decreasing of crystalline particle was in a dynamic equilibrium. The crystalline sizes of
synthesized BaTiO₃ by mechanochemistry were in the range of 10 to 30nm by XRD, SEM and TEM.

The silicon carbide particles were employed as the skeleton material, while the mixture of feldspar and clay in eutectic composition to form the glassy grain-boundary
phase serving as the binder to hold the SiC grains together, particulate carbon to be oxidized and generate pores. Slip casting process was investigated and some
properties of the porous ceramics were discussed. The isoelectric Zeta potential point of the SiC particles corresponded to the pH value of 5.2, and the pH values
of the slurry were controlled between 8 and 12 to provide the perfect stability and fluidity. The increase in the firing temperature decreases the range of the
pore size distribution, with the principal pore diameter keeps relatively constant. The neck-bridging structure exists among the SiC grains due to the viscous flow
of the grain-boundary phase at high temperatures, which helps to improve the binding behaviour. The oxidation product of SiC reacts with the grain-boundary phase,
and leads to the precipitation of needle-like mullite crystals, which gives rise to the abnormal increase in the strength of the porous ceramics.

After getting rid of Al₂O₃ film from the surface of melting Al, Al can wet and bond Al₂O₃ substrate perfectly. In this work, by die-casting-bonding process, in the temperautre range of 948-1098K and under N₂ atmosphere, Al/Al₂O₃ substrates were produced successfully. The performance of Al/Al₂O₃ substrates was investigated by SEM and mechanic testing equipment. The bonding strength of Al/Al₂O₃ measured is more than 15.94MPa.

The semichemical method was developed for the synthesis of 0.80Pb(Mg_1/3Nb_2/3)O₃-0.20PbTiO₃(0.80PMN-0.20PT) ceramics with pure perovskite phase. The precursors were prepared
by adding an aqueous Mg(NO₃)₂ solution rather than MgO to the alcoholic slurry of PbO, TiO₂ and Nb₂O₅. The TG-DTG-DSC and XRD analysis show that the
mechanism in this method is different from those of the known columbite or conventional mixed oxide method. Mg(NO₃)₂ reacts with PbO to form a intermediate of Pb₆O₅(NO₃)₂
at milling and calcinations process. The activated PbO and Pb₃O₄ by the intermediate reacted with Nb₂O₅ to form an unstable B-deficient pyrochlore structure of Pb₃Nb₂O₈，which progressively inserts magnesium oxide to transform into PMN-perovskite phase.

The phase development in the calcination of the precursors for the pseudo-binary system of PFN-PMN was investigated systematically by XRD method. During the
calcination of Mg-rich mixtures, a kind of Mg-rich niobate, Mg₄Nb₂O₉ forms along with the major phase MgNb₂O₆ (MN), whereas in the
calcination of Fe-rich mixture, there is no Mg₄Nb₂O₉ formed, indicating Fe₂O₃ (or FeNbO₄) may inhibit the formation of
Mg₄Nb₂O₉. The appearance of Mg₄Nb₂O₉ is directly related to the formation of pyrochlore in the calcinations of perovskite. MN starts to form at a temperature as
low as 650℃, a temperature much lower than its ferric counterpart FN. Therefore the reactivity of Fe₂O₃ is inferior to that of MgO in
the low temperature region.

Adsorption mechanism of dispersant PMAA-NH₄ on BaTiO₃ was studied by using potential and FTIR spectrum. The results show that the positive charge, Ba-OH₂⁺, existing on the surface of BaTiO₃ adsorbs the negative ion of the dispersant. The surface charge of BaTiO₃ and its IEP from pH=5.1 to pH=3.5 change after the addition of PMAA-NH₄. When pH=10, the concentration of PMAA-NH₄ is 0.8wt%, the adsorption comes up to saturation and stabilized BaTiO₃ suspension can be obtained.

MoO₃ can disperse onto the surface of mesoporous sieves MCM-41 by calcining the physical mixtures of MoO₃ and MCM-41 at 773K. The state of active component
MoO₃ on ordered mesoporous MCM-41 was studied by TEM and SAED along with XRD, N₂ sorption isotherms and BJH pore size distribution. The change for MCM-41
structure was also studied after MoO_₃ dispersed onto MCM-41. The results show that the XRD peaks of bulk MoO₃ disappear completely when the loading of MoO₃
is less than the monolayer dispersion capacity. The dispersed MoO₃ can not be observed by HRTEM, while EDS spectrum evidences that there is dispersed MoO₃
in the mesopores of MCM-41. It is not possible that MoO₃ disperses onto MCM-41 absolutely by calcining when the content of MoO₃ is more than the critical
dispersion capacity. XRD, HRTEM, N₂ sorption isotherms and BJH pore size distribution results all reveal that the ordered structure of MCM-41 is destroyed for the larger
amount of dispersed MoO₃.

Under lower gas pressure, the high-density nucleation of diamond films on alumina was successfully achieved by microwave plasma-enhanced chemical vapor deposition (MPCVD). It was found that the nucleation density increased with the decreases of gas pressure. Based on these results, a kinetic model for diamond nucleation in MPCVD system was proposed. The critical gas pressure corresponding to the highest nucleation density was also discussed.

Ti alloyed DLC films were prepared with a УВНИПА-1 deposition device by dual-excitation energy source. The mechanical properties and structures of the films
were measured and analyzed by Nanoindenter, Microhardness Tester, Atomic Force Microscope, as well as X-ray diffraction and X-ray
Photoelectron Spectroscope. Tribological tests were carried out on a ball-disk friction and wear tester. The performance change of DLC
films with different Ti alloying was investigated in view of heat treatment. The results show that the mechanical properties of the
films are not monotonous with Ti contents, and the friction coefficient increases with Ti content; the obvious microhardness increase results
from the formation of hardened TiC phase.

The distribution and content of hydrogen in DLC films prepared by plasma based pulsed bias deposition were characterized systematically by nuclear reaction
analysis (NRA). It was found that the DLC films with low hydrogen content can be obtained by plasma based bias deposition technique. The range of hydrogen
content in DLC films is about 6at% to 17at%, and the hydrogen distribution is equalization along the depth of films. With decrease in plasma density and
ionizability, the hydrogen contents in DLC films increase, however, the segregation of hydrogen in DLC films is promoted by hydrogen gas introduced into the working
gas. The dehydrogenation is promoted obviously by the energetic ions bombardment on growth surface.

Coating the surface of goethite nanoparticles by Si, Co oxides layer is one of the most important methods to improve the magnetic properties of metal magnetic
recording particles. The surface electronic properties of the coated nanoparticles were studied by using XPS. Results show that there is a close, uniform, firm and
ultra thin SiO₂ layer formed on the surface of hematite nanoparticles. Silica coating treatment changes the properties of the hematite cores significantly since
the binding energy of Fe 2p electrons shows significant shift related to the spectrum of the untreated hematite particles. The chemical shift of the binding
energy is more than 2.7eV. A possible interpretation for the shift of such spectral features is that the contact interface surface of silica layer and the hematite
particle surface is similar to P-N heterojunction. The cobalt oxides are adsorbed on part of the crystal face of Fe₂O₃ particles, and the binding energy of
whole XPS spectrum mainly shows physical shift about 4.4eV due to the surface charge.

Transparent TiO₂ thin film and Cu-doped TiO₂ thin film were prepared by the sol-gel method on the soda lime glass substrates. The change of hydrophilicity
of the films under UV illumination was investigated. The results of XRD, UV-VIS, XPS and AFM show that Cu ions are in the form of Cu₂O. The addition of Cu ions
can suppress the grain growth of crystals in the TiO₂ thin film. Pure TiO₂ thin film can be entirely wetted by water after UV illumination for 5h and shows
good hydrophilicity. The hydrophilicity of TiO₂ will decrease with increasing amount of Cu dopants.

A simple method to form particulate film under Gibbs film was reported. The CuS particulate film was synthesized, and a novel phenomenon of the formation of rod-like CuS nano-crystals at the oil-water interface was observed. The CuS particulate film was characterized by transmission electron microscopy and electron diffraction. Energy dispersive spectroscopy was employed to confirm the formation of the rod-like CuS nano-crystals.

In order to improve the biocompatibility of NiTi alloy, TiO₂ films were synthesized on the surface by sol-gel and Ion beam enhanced deposition (IBED) methods, respectively.
The structure, surface morphology and composition of the films were studied comparatively by X-ray diffraction (XRD), atomic force microscopy (AFM) and X-ray
photoelectron spectra (XPS). The electrochemical corrosion measurement showsthat the two kinds of TiO2 films both can improve the corrosion resistance
of metallic biomaterials in simulated body fluid as a protective layer on the surface. In order to further improve the anticoagulation of implants, immobilization
of heparin molecule on the film surface was also investigated. The results indicate that sol-gel-derived TiO₂ film can obtain better heparin immobilization effects
than Ion beam derived TiO₂ film.

The changes of properties and structure in GeS₂ amorphous semiconductor films by light illumination from Ar ion laser were studied with the XRD, IR, SEM and
transmission spectra analysises. Photoinduced crystallization was also observed in the exposed films. The results show that the optical absorption edges of the
films shift to shorter wavelength according to annealing and light illumination. The magnitude of shift increases with the increase of the intensity of illumination
light and the illumination time, and the shift in annealed films is reversible.

The ac conductivity spectra were measured in the temperature range from 313 to 473K for a Y₂O₃-stabilized ZrO₂ (YSZ). Then the dc
conductivity was deduced and its temperature dependence analyzed. It was shown that, at low temperatures, the activation energy for conduction
in YSZ increases with increasing temperature. This experimental phenomenon is rather different with those observed previously in the high temperature
range in which the activation energy was found to decrease with increasing temperature. Based on the analyses of the mechanisms for disassociation and
migration of oxygen vacancies in the materials, a reasonable explanation for the temperature dependence of the activation energy for conduction in YSZ was
proposed.

Nanometer ZnS powders were synthesized by the solid state reaction of ZnSO₄·7H₂O with Na₂S·9H₂O at room temperature. The gas sensitivity of ZnS obtained was discussed XRD and TEM show that the solid-state reaction at room temperature is feasible and reasonable and the mean grain size of ZnS crystalline is about 15nm. The translation temperature from ZnS to ZnO measured by TG-DTA is 610℃. The sensor based on ZnS obtained shows a good sensitivity and selectivity to H₂S.

Ba_0.65Sr_0.35TiO₃ materials were prepared by sol-gel processing and microwave sintering, their dielectric properties were studied and compared with
the same compositional material prepared by conventional processing. The results show that the synthetic temperature of the BST powder can be reduced from 1100℃　to 900℃, and the BST ceramic with fine grain (～1μm) can be obtained
by microwave sintering at 1310℃ for 25 minutes. With the decreasing of grain size, the relative dielectric constant of the samples changes slightly and
the dielectric loss reduces greatly. The decrease of dielectric loss is attributed to the presence of an internal stress in the fine-grained BST ceramics.

The mechanical properties of molybdenum/partially stabilized zirconia (PSZ) composites were investigated
from room temperature to 1573K by means of modified small punch (MSP) test which has been found to be suitable for the mechanical evaluation of brittle
materials. The temperature dependences of the deformation, strength and fracture behavior of the composites were examined in detail. The results of this paper
have shown that the high temperature strength can be simply determined by the MSP test and there exists a good linear relationship between MSP strength and
conventional 4-point bending strength. Using such correspondence the bending strength can be estimated from the MSP strength.

The contact stress and the critical stress distribution were analyzed, and some paradoxes related to contact crack initiation were explained through the effect of stress gradient. Based on the Mean-Strength criterion, a testing method for determining the local strength and residual stress in brittle materials was developed. And also a simple technique of proof test was created, that is useful for non-destructive evaluation of the strength for brittle components.

The phase assembles of Sr_0.4Ba_0.6Nb₂O₆ (SBN40) starting powder mixture calcined
at different temperatures were identified by X-ray Guinier-Hagg camera film data and the unit cell dimensions of strontium barium niobate
(SBN) developed at different temperatures were calculated by using PIRUM program. It was found that four intermediate phases, i.e.,
Na₅Nb₄O₁₅, Sr₅Nb₄O₁₅, SrNb₂O₆ and BaNb₂O₆ were developed during the formation of Sr_0.4Ba_0.6Nb₂O₆ and the two latter phases reacted to form SBN. The unit cell dimensions of SBN decreased with increasing sintering temperature. On the basis of results,
the corresponding formation mechanism of Sr_0.4Ba_0.6Nb₂O₆ phase was also suggested.

Application of the artificial neural network (ANN) to the formulation design of BaTiO₃ based dielectrics was carried through for the first time. Based on the
homogenous experimental design, the experimental results of 21 samples were analyzed by a three-layered BP network model. The results were also expressed by intuitionistic
graphics. In addition, optimized formulations were calculated and the optimized ε₂₅ output values were in accordance with experiments. The three-layer
BP network proved to be a very useful tool in dealing with problems with serious non-linearity encountered in the formulation design of dielectric ceramics.

High temperature absorber is a great obstacle for development of stealth material. Si/C/N nano powder is
a potential candidate of high temperature absorber. In order to optimizer and control the dielectric loss of Si/C/N nano powder, neural network (NN)
model was developed. The output of NN model was found to be best fit with the sample data’s. With the help of the NN model, a series of predictions
about the dielectric loss-nitrogen content were made. Finally, the prediction about the influence of nitrogen content of Si/C/N nano powder and frequency
on the dielectric loss predicted by NN model was identical well with the experimental results, which shows that the model established by NN can mirror
the dielectric loss-results relationships and inner regularity in the high temperature absorber.

High-quality and large size Li₂B₄O₇ single crystals were grown by the modified vertical
Bridgman technique. Polycrystalline Li₂B₄O₇ powders were synthesized as raw materials and 3-inch-diameter LBO single crystal
was used as seed. The growth speed was less than 0.3mm/h and the temperature gradient in solid-liquid interface was about 30℃/cm.
Twin-free, core-free and inclusion-free LBO single crystals with 105mm in diameter and 120mm in length were grown successfully. The formation and
elimination of cracks, twins and inclusions were investigated. SAW properties of as-grown LBO crystals measured are as follows: dielectric
constant ε₁₁=9.33, piezoelectric constant d₃₃=0.94C/m² and coupling coefficient k₃₃=0.42.

he effects of properties of piezoelectric ceramics and implantation position on hearing threshold change
were studied. The experimental results show that the larger electromechancial coupling coefficient and electric capacity of implantation piezo-ceramics are,
the more obviously hearing threshold descends. And the successful probability is the highest while the ceramic sheet is stocked on the inside surface of
cochlear nerve of spiral limbus in the scala tympani. The results fully confirm the new idea is successful that piezoelectric ceramics cochlear
implant can simulate hair cell to do acoustic-electric transition, simulate auditory nerve to evoke the sense of hearing and improve the deaf ear’s
hearing.

The fabrication of core-shell monodispersed magnetic silica microspheres with tailored dimensions and compositions was accomplished by layer-by-layer self-assemble. The morphology and compositions of samples were characterized by XRD TEM, EDS. The alternating ζ-potentials were utilized to indicate the stepwise growth of multilayer films on colloids.

The transmittance of CVDZnS before and after heat isostatic processing (HIP)was measured. X-ray diffraction, AEM and metaloscopy were adopted to study the microstructure
of stereotype and HIP processed CVDZnS. Based on the different microstructures of CVDZnS before and after HIP observed，the reasons why the transmittance of CVDZnS
can be improved after HIP processing was analysised. The results show that the grain size of CVDZnS is improved dramatically after HIP processing，and the defects
formed during the growth of CVDZnS are minimized, so the transmittance of CVDZnS is improved for the decrease of scatter losses at the grain boundary and structure defects.

The effects of deposition temperature and system pressure on the morphology of deposited silicon carbide (SiC) were studied with CH_3SiCl_3 as source materials,
hydrogen as carry gas and argon as dilute gas. All sorts of morphologies were accounted by using the principle of the nuclei-growth of crystals and the theory
of thermodynamics of SiC deposition. The results show that reducing system pressure and increasing deposition temperature are propitious to decrease the maximum energy
for forming SiC nucleus in vapor, and promote forming nucleus. The change of the morphology of SiC deposition can be determined by the change of deposition thermodynamics
of SiC with deposition conditions.

A nanostructured zirconia coating was fabricated successfully by atmospheric plasma spraying (APS). The microstructure and phase composition of the coating were characterized with SEM, TEM and XRD, respectively. The granulated powders
with sizes in the range of 15 to 40μm have excellent flowability and are suitable for plasma spraying process. The grain size of the as-sprayed zirconia
coating has a distribution range from 60 to 120nm, and the grain boundary is clear. The as-sprayed nanostructured ZrO_2 coatings are composed of tetragonal and cubic
phases of zirconia, and their porosity and tensile strength are about 7% and 45MPa respectively.

The aluminium oxide films were deposited on Si(100) substrate by plasma source enhanced magnetron sputtering by using an electron cyclotron resonance (ECR) microwave plasma source and a direct current magnetron sputtering target. X-ray photoelectron spectroscopy (XPS) and glancing angle X-ray diffraction patterns show that the metastable stoichiometric γ-Al₂O₃ films can be obtained at a higher deposition temperature of 600℃. The refractive index of the films is 1.7, corresponding with that of stable α-Al₂O₃.

A kind of honeycomb ceramic coating was prepared by using microwave heating methods. Differences on specific area, crystal and catalytic activity between the microwave coating (TC-B) and the normal coating (TC-A) were tested and analyzed too. The results show that the main characteristic parameters of the coating by microwave process are as good as, if not better than, that of the coating by existing process. Using microwave process to prepare γ-Al₂O₃ honeycomb ceramic coating can save large amount of energ, time and cost.