Electromagnetic field effects during microwave sintering of alumina-containing ceramic composites
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Sergey Egorov, Anatolii Eremeev*, Vladislav Kholoptsev, Kirill Rybakov, Andrey Sorokin
The sintering kinetics have been compared for direct and susceptor-assisted rapid 24 GHz microwave heating of alumina – 3 % yttria-stabilized zirconia samples prepared from commercial powders and powders obtained by laser evaporation. The temperature of the phase transformation in alumina decreased consistently with increasing microwave electromagnetic field intensity. Ce:YAG + Al2O3 composite samples have been fabricated by microwave reaction sintering. Under microwave heating the temperatures of phase transformations in both alumina and the Y – Al – O system decreased compared to conventional heating.
Keywords: Microwave processing; sintering; optical dilatometry; phase transformations; gyrotron
Proscience vol. 10
Pp 18-23