Development Overview of Refractory Materials

doi:10.15541/jim20170582

Abstract

Abstract:

In this paper, current situation of refractory industry in China is introduced briefly. Developing tendency of refractory materials is remarked based on the technical development of high temperature industries. Advanced refractory materials, characterized by long service life, functionalization, lightweight and ecological-friendly design, play very important roles in sustainable development of high temperature industries. Since the key service properties of advanced refractories constrain each other in traditional material design and fabrication, new design methods are developed to optimize the key service properties simultaneously. Combined with the development of new insulating materials, and functional refractories used in steel-making industry, structure-function combining design concept and new fabrication technologies are introduced by applying FEM analysis, bridging of advance ceramic technologies, and multilayered/gradient composite structure.

Key words: advanced refractories, structure-function combining design, insulating materials, functional refractories, review

CLC Number:

TQ175

LI Hong-Xia. Development Overview of Refractory Materials[J]. Journal of Inorganic Materials, 2018, 33(2): 198-205.

Figures/Tables 10

Fig. 1 Microstructure and effects of temperature on thermal conductivity of developed ceramic fiber enforced nano-SiO2- fumed-corundum insulation composite materials[41]

Fig. 2 Insulting effect versus the thickness of developed insulation composite materials with micro/nano-sized pores[41]

Table 1 Properties of developed insulation composite material with micro/nano-sized pores[42]

	Developed composite plate	Developed plate with nano-sized pores	A Company	B Company	Porextherm plate with nano-sized pores
Thermal conductivity (1000℃)/(W·m^-1·K^-1)	0.087	0.063	0.050(800℃)	—	0.062
Bulk density/(g·cm^-3)	0.55-0.65	0.35-0.4	0.30-0.35	—	0.35-0.45
Service temperature/℃	1800	1100	850	650	1100
Linear change/% (1000℃, 24 h)	~1.5	<2	—	—	<2

Fig. 3 The product photo and SEM image of porous silicon nitride-silicon carbide composites[42] (a) Product(STIC-n); (b) SEM photograph

Fig. 4 Comparison of erosion resistance of several insulation materials (a) before and (b) after test[43]

Fig. 5 The influence of Al-Si alloy antioxidant additives on the microstructure and properties of Al2O3-C refractories[44] (a) Fibrous substance formed by antioxidant reaction; (b) Narrowing influence on the pores distribution; (c) Effect on HMOR

Fig. 6 (a) Char yield of phenolic resins, (b) SEM image of carbon fiber and (c)TEM image of carbon fiber[45]

Fig. 7 (a) SEM image of expanded graphite, (b) SEM image of alumina composite powder covered by nano-carbon and (c) TEM image of nano-carbon[4]

Fig. 8 Schematic diagram of the long nozzle with composite structure[42]

Fig. 9 Effects of stress buffer release area with micro-porous structure on temperature field and maximum thermal stress[42]

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