High-temperature Insulation Property of Opacifier-doped Al2O3-SiO2 Aerogel/Mullite Fiber Composites

doi:10.15541/jim20170570

Abstract

Abstract:

Infrared opacifier-doped Al₂O₃-SiO₂ aerogel/mullite fiber composites were successfully prepared through a mixed Sol-Gel and supercritical drying process by using TiCl₄ and ZrOCl₂·8H₂O as the source of TiO₂ and ZrO₂, respectively. Effects of two kinds of infrared opacifier on microstructure, mechanical property and thermal conductivity of composites were studied. The results show that introduction of infrared opacifier effectively prevent the aerogels from collapse and agglomeration when exposed to high temperature, leading to high-level retention of porosity. The aerogel/mullite fiber composites demonstrate a typical structure of aerogel filled fibrous fiber with marvelous properties—low density (0.21-0.24 g·cm^-1) and high bending strength performance (0.98-1.26 MPa), which expands brilliant potential in many areas of application. When exposed to high temperature of 1050℃, the thermal conductivity of TiO₂ and ZrO₂ doped composites can be significantly reduced from 0.098 W·m^-1·K^-1 to 0.085 W·m^-1·K^-1 and 0.076 W·m^-1·K^-1, respectively, which could be attributed to outstanding scattering and absorbing ability of the infrared opacifiers to the infrared electromagnetic wave. All results indicate that the addition of infrared opacifiers is a promicsing approach to enhance high-temperature properties of aerogel materials.

Key words: Al₂O₃-SiO₂aerogels, infrared opacifier, thermal conductivity, high temperature insulation properties

CLC Number:

TB35

ZHU Zhao-Xian,WANG Fei,YAO Hong-Jun,DONG Jin-Xin,LONG Dong-Hui. High-temperature Insulation Property of Opacifier-doped Al₂O₃-SiO₂Aerogel/Mullite Fiber Composites[J]. Journal of Inorganic Materials, 2018, 33(9): 969-975.

Figures/Tables 10

Fig. 1 SEM images of aerogels before and after thermal treatment at 800℃(a) AS; (b) AST; (c) ASZ; (d) AS-800; (e) AST-800; (f) ASZ-800

Fig. 2 XRD patterns of aerogels after calcined at different temperatures(a) AS; (b) AST; (c) ASZ

Fig. 3 Nitrogen adsorption isotherms (a, c) and pore size distribution curves (b, d) of aerogels before and after heat-treatment at 800℃

Table 1 Pore structure of aerogels

Sample	S ^a_BET/(m²·g^-1)	V ^b_total/(cm³·g^-1)	D_p^c/nm
AS	856	3.15	24.4
AST	540	1.86	4.2
ASZ	590	1.65	4.4
AS-800	332	1.93	16.9
AST-800	496	1.45	3.8
ASZ-800	447	1.57	4.3

Fig. 4 SEM images of mullite fiber/aerogels composites(a) ASMF; (b) ASTMF; (c) ASZMF

Fig. 5 Flexural stress-strain curves of composites

Table 2 Basic physical properties of composites

Sample	Density /(g·cm^-3)	Content of aerogels/%	Bending strength/MPa
ASMF	0.21	42.9	0.98
ASTMF	0.23	47.8	0.62
ASZMF	0.24	50.0	1.26

Fig. 6 Nitrogen adsorption isotherms (a, c) and pore size distribution curves (b, d) of composites before and after heat-treatment at 800℃

Table 3 Pore structure of composites

Sample	S ^t_BET/(m²·g^-1)	S ^a_BET/(m²·g^-1)	V ^b_total/(cm³·g^-1)	D_p^c/nm
ASMF	396	251	0.62	4.4
ASTMF	284	277	0.95	4.8
ASZMF	320	207	0.67	4.3
ASMF-800	/	136	0.34	3.5
ASTMF-800	/	204	0.77	4.4
ASZMF-800	/	192	0.61	3.9

Fig. 7 Thermal conductivity of composites varying with temperature

References 20

[1]	ARAKI K, KAMOTO D, MATSUOKA S.Optimization about multilayer laminated film and getter device materials of vacuum insulation panel for using at high temperature.Journal of Materials Processing Technology, 2009, 209(1): 271-282.
[2]	LIU ZHAO-HUI, SU XUN-JIA, HOU GEN-LIANG.Effects of silicon content on microstructure and photocatalytic activity of TiO2/SiO2 composite aerogels.Journal of Inorganic Materials, 2010, 25(9): 911-915.
[3]	HU JIE-GANG, CHEN QI-YUAN, LI JIE,et al. Preparation of TiO2 aerogels by ambient presure drying. Journal of Inorganic Materials, 2009, 24(4): 685-689.
[4]	RANDALL J P, MEADOR M A B, JANA S C. Tailoring mechanical properties of aerogels for aerospace applications.ACS Applied Materials & Interfaces, 2011, 3(3): 613-626.
[5]	WANG DONG, WANG YU-JIN.Processing, microstructure and properties of ZrC ceramic composites.Journal of Inorganic Materials, 2015, 30(5): 449-458.
[6]	BAETENS R, JELLE B P, GUSTAVSEN A.Aerogel insulation for building applications: a state-of-the-art review.Energy and Buildings, 2011, 43(4): 761-769.
[7]	WANG LI-JIU, ZHAO SHAN-YU, YANG MEI.Structural characteristics and thermal conductivity of ambient pressure dried silica aerogels with one-step solvent exchange/surface modification.Materials Chemistry and Physics, 2009, 113(1): 485-490.
[8]	ANDERSON A M, WATTLEY C W, CARROLL M K.Silica aerogels prepared via rapid supercritical extraction: effect of process variables on aerogel properties. Journal of Non-Crystalline Solids, 2009, 355(2): 101-108.
[9]	YODA S, OHTAKE K, TAKEBAYASHI Y,et al. Preparation of SiO2-TiO2 aerogels using supercritical impregnation. Journal of Sol-Gel Science and Technology, 2000, 19(1/2/3): 719-723.
[10]	ZHANG HU, FANG WEN-ZHEN, WANG XIAN,et al. Thermal conductivity of fiber and opacifier loaded silica aerogel composite. International Journal of Heat and Mass Transfer, 2017, 115(1): 21-31.
[11]	ZENG J S Q, GREIF R, Stevens P, et al. Effective optical constants n and κ and extinction coefficient of silica aerogel.Journal of Materials Research, 1996, 11(3): 687-693.
[12]	DENG ZHONG-SHENG, ZHANG HUI-LIN, WANG JIAN-DONG,et al. Structure and thermal properties of SiO2 doped aerogels. Journal of Aeronautical Materials, 1999, 19(4): 38-43.
[13]	LU GUI, WANG XIAO-DONG, DUAN YUAN-YUAN,et al. Effects of non-ideal structures and high temperatures on the insulation properties of aerogel-based composite materials. Journal of Non-Crystalline Solids, 2011, 357(22): 3822-3829.
[14]	KWON Y G, CHOI S Y, KANG E S,et al. Ambient-dried silica aerogel doped with TiO2 powder for thermal insulation. Journal of Materials Science, 2000, 35(24): 6075-6079.
[15]	ZHAO JUN-JIE, DUAN YUAN-YUAN, WANG XIAO-DONG,et al. An analytical model for combined radiative and conductive heat transfer in fiber-loaded silica aerogels. Journal of Non-Crystalline Solids, 2012, 358(10): 1303-1312.
[16]	XU LIN, JIANG YONG-GANG, FENG JUN-ZONG,et al. Infrared-opacified Al2O3-SiO2 aerogel composites reinforced by SiC- coated mullite fibers for thermal insulations. Ceramics International, 2015, 41(1): 437-442.
[17]	ABE H, ABE I, SATO K,et al. Dry powder processing of fibrous fumed silica compacts for thermal insulation. Journal of the American Ceramic Society, 2005, 88(5): 1359-1361.
[18]	LIANG BO, CAI AN, CHEN HUANG,et al. Thermophysical properties of air plasma sprayed zirconia coating deposited by reconstituted nanosize particles. Journal of Inorganic Materials, 2010, 25(7): 695-699.
[19]	CHA J, KIM S, PARK K W,et al. Improvement of window thermal performance using aerogel insulation film for building energy saving. Journal of Thermal Analysis and Calorimetry, 2014, 116(1): 219-224.
[20]	FU TAI-RAN, TANG JIA-QI, CHEN KAI, ,et al. Determination of scattering. Determination of scattering and absorption coefficients of porous silica aerogel composites. Journal of Heat Transfer, 2016, 138(3): 032702-1-7.

High-temperature Insulation Property of Opacifier-doped Al₂O₃-SiO₂Aerogel/Mullite Fiber Composites

RichHTML

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

Figures/Tables 10

References 20

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	CHEN Qiang, BAI Shuxin, YE Yicong. Highly Thermal Conductive Silicon Carbide Ceramics Matrix Composites for Thermal Management: a Review [J]. Journal of Inorganic Materials, 2023, 38(6): 634-646.
[2]	ZHANG Shuo, FU Qiangang, ZHANG Pei, FEI Jie, LI Wei. Influence of High Temperature Treatment of C/C Porous Preform on Friction and Wear Behavior of C/C-SiC Composites [J]. Journal of Inorganic Materials, 2023, 38(5): 561-568.
[3]	FU Shi, YANG Zengchao, LI Honghua, WANG Liang, LI Jiangtao. Mechanical Properties and Thermal Conductivity of Si₃N₄ Ceramics with Composite Sintering Additives [J]. Journal of Inorganic Materials, 2022, 37(9): 947-953.
[4]	HU Jiajun, WANG Kai, HOU Xinguang, YANG Ting, XIA Hongyan. Boron Phosphide with High Thermal Conductivity: Synthesis by Molten Salt Method and Thermal Management Performance [J]. Journal of Inorganic Materials, 2022, 37(9): 933-940.
[5]	WANG Pengjiang, KANG Huijun, YANG Xiong, LIU Ying, CHENG Cheng, WANG Tongmin. Inhibition of Lattice Thermal Conductivity of ZrNiSn-based Half-Heusler Thermoelectric Materials by Entropy Adjustment [J]. Journal of Inorganic Materials, 2022, 37(7): 717-723.
[6]	RUAN Jing, YANG Jinshan, YAN Jingyi, YOU Xiao, WANG Mengmeng, HU Jianbao, ZHANG Xiangyu, DING Yusheng, DONG Shaoming. Porous SiC Ceramic Matrix Composite Reinforced by SiC Nanowires with High Strength and Low Thermal Conductivity [J]. Journal of Inorganic Materials, 2022, 37(4): 459-466.
[7]	LOU Xunuo, DENG Houquan, LI Shuang, ZHANG Qingtang, XIONG Wenjie, TANG Guodong. Thermal and Electrcial Transport Properities of Ge Doped MnTe Thermoelectrics [J]. Journal of Inorganic Materials, 2022, 37(2): 209-214.
[8]	WANG Weide, CHEN Huanbei, LI Shishuai, YAO Dongxu, ZUO Kaihui, ZENG Yuping. Preparation of Silicon Nitride with High Thermal Conductivity and High Flexural Strength Using YbH₂-MgO as Sintering Additive [J]. Journal of Inorganic Materials, 2021, 36(9): 959-966.
[9]	WANG Haoxuan, LIU Qiaomu, WANG Yiguang. Research Progress of High Entropy Transition Metal Carbide Ceramics [J]. Journal of Inorganic Materials, 2021, 36(4): 355-364.
[10]	SANG Weiwei, ZHANG Hongsong, CHEN Huahui, WEN Bin, LI Xinchun. Preparation and Thermophysical Properties of (Sm_0.2Gd_0.2Dy_0.2Y_0.2Yb_0.2)₃TaO₇High-entropy Ceramic [J]. Journal of Inorganic Materials, 2021, 36(4): 405-410.
[11]	MU Tinghai, XU Wentao, LING Junrong, DONG Tianwen, QIN Zixuan, ZHOU Youfu. Microstructure and Properties of ZrO₂-AlN Composite Ceramics by Microwave Sintering [J]. Journal of Inorganic Materials, 2021, 36(11): 1231-1236.
[12]	GAO Jiming, YANG Yang, LEI Ting, WANG Jin, LIU Jie, ZHANG Limin. Synthesis and Characterization of SiC@SiO₂/BN/PI Composites by in-situ Polymerization [J]. Journal of Inorganic Materials, 2021, 36(1): 36-42.
[13]	QIU Xiaoxiao,ZHOU Xiying,FU Yuntian,SUN Xiaomeng,WANG Lianjun,JIANG Wan. Influence of Ge_1-_xIn_xTe Microstructure on Thermoelectric Properties [J]. Journal of Inorganic Materials, 2020, 35(8): 916-922.
[14]	JI Xiaojuan,YU Yueguang,LU Xiaoliang. Effects of Impurities on Properties of YSZ Thermal Barrier Coatings [J]. Journal of Inorganic Materials, 2020, 35(6): 669-674.
[15]	ZHOU Xingyuan, LIU Wei, ZHANG Cheng, HUA Fuqiang, ZHANG Min, SU Xianli, TANG Xinfeng. Optimization of Thermoelectric Transport Properties of Nb-doped Mo_1-_xW_xSeTe Solid Solutions [J]. Journal of Inorganic Materials, 2020, 35(12): 1373-1379.