Influence of ZrO2 and WO3 Doping Additives on the Thermal Properties of Porous Mullite Ceramics
Ceramics International 2018
Ludmila Mahņicka-Goremikina, Ruta Švinka, Visvaldis Švinka

Porous mullite-corundum refractory ceramics were produced by a patented slurry slip casting method from compositions based on commercially available α-Al2O3 and γ-Al2O3, fused SiO2 and kaolin. Pores were formed as a result of a chemical reaction of aluminium with water. The influence of usage of raw materials and doping additives such as micro-size ZrO2 and WO3 on the sintering temperature, formation of crystalline phases, linear thermal expansion, thermal conductivity and thermal shock resistance of mullite-corundum ceramic was studied. The best thermal shock resistance and, simultaneously, lower thermal conductivity was achieved for the samples doped with WO3. This was due to the influence of micro-sized WO3 on the change in γ-Al2O3 modification to α-Al2O3 and on the structure of mullite ceramics.


Keywords
Porous mullite ceramics, Linear thermal expansions
DOI
10.1016/j.ceramint.2018.06.125
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0272884218315670?via%3Dihub

Mahņicka-Goremikina, L., Švinka, R., Švinka, V. Influence of ZrO2 and WO3 Doping Additives on the Thermal Properties of Porous Mullite Ceramics. Ceramics International, 2018, Vol.44, Iiss.14, pp.16873-16879. ISSN 0272-8842. Available from: doi:10.1016/j.ceramint.2018.06.125

Publication language
English (en)
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