Effects of firing temperature on the microstructures and properties of porous mullite ceramics prepared by foam-gelcasting

被引：42

作者：

Deng, X. G. ^{[1
,2
]}

Wang, J. K. ^{[1
]}

Zhang, H. J. ^{[1
]}

Liu, J. H. ^{[1
]}

Zhao, W. G. ^{[1
]}

Huang, Z. ^{[1
]}

Zhang, S. W. ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[2] Luoyang Cen Lon Ceram Co Ltd, Luoyang 471003, Peoples R China

来源：

ADVANCES IN APPLIED CERAMICS | 2016年 / 115卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Porous mullite ceramics; Foam-gelcasting; Firing temperature; Thermal conductivity; THERMAL-CONDUCTIVITY; FABRICATION; COMPOSITES; STRENGTH;

D O I：

10.1080/17436753.2015.1116820

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Porous mullite ceramics were prepared at 1300-1600 degrees C for 2h via a foam-gelcasting route using industrial-grade mullite powders as the main raw material, Isobam 104 as the dispersing and gelling agent, triethanolamine lauryl sulphate as the foaming agent and sodium carboxymethyl cellulose as the foam stabilising agent. The effects of firing temperature on the sintering behaviour of green samples as well as microstructures and properties of final porous mullite products were investigated. With increasing the temperature from 1300 to 1600 degrees C, linear shrinkage and bulk density values of fired samples increased, whereas their porosity decreased. Mechanical strength and thermal conductivity values of fired samples decreased with increasing their porosities. Even at a porosity level as high as 79.4%, compressive and flexural strengths of fired samples (with average pore size of 314m) remained as high as 9.0 and 3.7MPa, respectively, and their thermal conductivity (at 200 degrees C) remained as low as 0.21W(m(-1)K(-1)).

引用

页码：204 / 209

页数：6

共 16 条

[1] Thermal conductivity of highly porous mullite material [J].

Barea, R ;

Osendi, MI ;

Ferreira, JMF ;

Miranzo, P .

ACTA MATERIALIA, 2005, 53 (11) :3313-3318

[2] Preparation and characterization of porous mullite ceramics via foam-gelcasting [J].

Deng, Xiangong ;

Wang, Junkai ;

Liu, Jianghao ;

Zhang, Haijun ;

Li, Faliang ;

Duan, Hongjuan ;

Lu, Lilin ;

Huang, Zhong ;

Zhao, Wanguo ;

Zhang, Shaowei .

CERAMICS INTERNATIONAL, 2015, 41 (07) :9009-9017

[3] Porous mullite ceramics with low thermal conductivity prepared by foaming and starch consolidation [J].

Gong, Lunlun ;

Wang, Yonghong ;

Cheng, Xudong ;

Zhang, Ruifang ;

Zhang, Heping .

JOURNAL OF POROUS MATERIALS, 2014, 21 (01) :15-21

[4] Fabrication of porous ceramic composites with improved compressive strength from coal fly ash [J].

Lee, J. H. ;

Kim, W. Y. ;

Yang, T. Y. ;

Yoon, S. Y. ;

Kim, B. K. ;

Park, H. C. .

ADVANCES IN APPLIED CERAMICS, 2011, 110 (04) :244-250

[5]

Luo X. W., 2014, J INORG MATER, V29, P1179

[6] Gelcasting of alumina foams consolidated by epoxy resin [J].

Mao, Xiaojian ;

Shimai, Shunzo ;

Wang, Shiwei .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2008, 28 (01) :217-222

[7] MULLITE ALUMINA PARTICULATE COMPOSITES BY INFILTRATION PROCESSING .3. MECHANICAL-PROPERTIES [J].

MARPLE, BR ;

GREEN, DJ .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (10) :2453-2459

[8] COMPARISON OF STRESS-CONCENTRATION VERSUS MINIMUM SOLID AREA BASED MECHANICAL PROPERTY POROSITY RELATIONS [J].

RICE, RW .

JOURNAL OF MATERIALS SCIENCE, 1993, 28 (08) :2187-2190

[9] In situ synthesis and thermal shock resistance of mullite used for thermal storage ceramics in solar thermal power generation [J].

Wu, J. F. ;

Cheng, H. ;

Xu, X. H. ;

Deng, T. F. ;

Chen, L. ;

Zhang, D. .

ADVANCES IN APPLIED CERAMICS, 2014, 113 (03) :147-152

[10] Synthesis, evaluation and characterization of alumina ceramics with elongated grains [J].

Xu, LH ;

Xie, ZP ;

Gao, LC ;

Wang, XD ;

Lian, F ;

Liu, T ;

Li, WC .

CERAMICS INTERNATIONAL, 2005, 31 (07) :953-958

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