Effects of the Sintering Temperature on the Structure and Properties of the Alumina Foamed Ceramics

Alumina foam ceramics reinforced with alumina fibers were prepared with gel-casting. The effects of the sintering temperature on the foam ceramics were investigated. The foam ceramics were composed of α-Al 2 O 3 , C-AlPO 4 , and T-AlPO 4 phases. And the mount of T-AlPO 4 phase decreased, while the mount of C-AlPO 4 phase increased once the sintering temperature exceeded 1180℃ due to the phase transformation of T-AlPO4 to C-AlPO4 phase. The grain average size of the foam ceramic increased obviously with the sintering temperature rise, so did its bulk density. While its open porosity decreased. The compression strength of the foam ceramic continuously increased with the sintering temperature rise from 980 to 1580 °C.

[1]  Toru Shimizu,et al.  Thermal conductivity of high porosity alumina refractory bricks made by a slurry gelation and foaming method , 2013 .

[2]  E. Longo,et al.  Sintering of porous alumina obtained by biotemplate fibers for low thermal conductivity applications , 2013 .

[3]  L. Bing.  Research progress of porous alumina ceramics , 2013 .

[4]  Haiyan Du,et al.  Preparation of self-reinforcement of porous mullite ceramics through in situ synthesis of mullite whisker in flyash body , 2012 .

[5]  H. Al-Qureshi,et al.  Fiber-Matrix Compatibility in an All-Oxide Ceramic Composite with RBAO Matrix , 2012 .

[6]  Wen Chen,et al.  Effects of MCAS glass additives on dielectric properties of Al2O3–TiO2 ceramics , 2008 .

[7]  A. Eckel,et al.  Oxidation Kinetics and Stress Effects for the Oxidation of Continuous Carbon Fibers within a Microcracked C/SiC Ceramic Matrix Composite , 2008 .

[8]  Li Shen,et al.  Thermal shock resistance of the porous Al2O3/ZrO2 ceramics prepared by gelcasting , 2007 .

[9]  E. Hodgson,et al.  Electrical and mechanical behaviour of improved platinum on ceramic bolometers , 2007 .

[10]  M. Weinmann,et al.  Fabrication of Fiber‐Reinforced Ceramic Composites by the Modified Slurry Infiltration Technique , 2007 .

[11]  G. Zhimeng.  Study on the Influencing Factors of Green Strength by Gelcasting , 2007 .

[12]  David S. Smith,et al.  Preparation and thermal conductivity characterisation of highly porous ceramics: Comparison between experimental results, analytical calculations and numerical simulations , 2007 .

[13]  R. Hay,et al.  Zirconia–Silica–Carbon Coatings on Ceramic Fibers , 2005 .

[14]  S. McKeever,et al.  The response of thermally and optically stimulated luminescence from Al2O3:C to high-energy heavy charged particles. , 2004, Radiation measurements.