A kind of preparation method of SIC-based composite phase ceramic solidified body
A technology of multiphase ceramics and solidified bodies, which can be used in radioactive purification, nuclear engineering, etc., can solve the problems of excessive graphite and by-products, expensive disposal costs, and poor solidification of solidified bodies, and achieve excellent chemical stability, high mechanical strength, Excellent radiation resistance
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Embodiment 1
[0031] A preparation method of a SiC-based composite phase ceramic solidified body, the steps are: using silicon powder, graphite, ZnO, CaO, Al 2 o 3 , SiO 2 As raw material, the formula is ZnO: CaO: Al 2 o 3 : SiO 2 =0.2:0.7:1:6 (molar ratio), Si:C=1.05 (molar ratio), 85wt% (mass percent) (Si+C)+15wt% ZCAS. First weigh ZnO, CaO, Al 2 o 3 , SiO 2 , adopt planetary mill ball mill for 5 hours, the material of ball mill: ball: dehydrated alcohol is 1: 3: 0.8 (mass ratio), oven dry (temperature 80 ℃, time 6 hours), calcining in ceramic fiber furnace, temperature is 1600 ℃, heat preservation for 1 hour, water quenching, pulverization and fine grinding to obtain ZCAS glass powder, then weigh silicon powder and graphite powder, then weigh the prepared ZCAS glass powder and add a mixture of Si and C, and use a planetary ball mill for 5 hours. Material: ball: absolute ethanol is 1: 3: 2 (mass ratio), vacuum drying (first temperature 50 ℃, time 6 hours; then temperature 120 ℃, t...
Embodiment 2
[0033] A preparation method of a SiC-based composite phase ceramic solidified body, the steps are: using silicon powder, graphite, ZnO, CaO, Al 2 o 3 , SiO 2 As raw material, the formula is ZnO: CaO: Al 2 o 3 : SiO 2 =0.4:0.5:1:6 (molar ratio), Si:C=1.05 (molar ratio), 85wt% (mass percent) (Si+C)+15wt% ZCAS. First weigh ZnO, CaO, Al 2 o 3 , SiO 2 , adopt planetary mill ball mill for 5 hours, the material of ball mill: ball: dehydrated alcohol is 1: 3: 0.8 (mass ratio), oven dry (temperature 80 ℃, time 6 hours), calcining in ceramic fiber furnace, temperature is 1600 ℃, heat preservation for 1 hour, water quenching, pulverization and fine grinding to obtain ZCAS glass powder, then weigh silicon powder and graphite powder, then weigh the prepared ZCAS glass powder and add a mixture of Si and C, and use a planetary ball mill for 5 hours. Material: ball: absolute ethanol is 1: 3: 2 (mass ratio), vacuum drying (first temperature 50 ℃, time 6 hours; temperature 120 ℃, time 6...
Embodiment 3
[0035] A preparation method of a SiC-based composite phase ceramic solidified body, the steps are: using silicon powder, graphite, ZnO, CaO, Al 2 o 3 , SiO 2 As raw material, the formula is ZnO: CaO: Al 2 o 3 : SiO 2 =0.5:0.4:1:6 (molar ratio), Si:C=1.05 (molar ratio), 85wt% (mass percent) (Si+C)+15wt% ZCAS. First weigh ZnO, CaO, Al 2 o 3 , SiO 2, adopt planetary mill ball mill for 5 hours, the material of ball mill: ball: dehydrated alcohol is 1: 3: 0.8 (mass ratio), oven dry (temperature 80 ℃, time 6 hours), calcining in ceramic fiber furnace, temperature is 1600 ℃, heat preservation for 1 hour, water quenching, pulverization and fine grinding to obtain ZCAS glass powder, then weigh silicon powder and graphite powder, then weigh the prepared ZCAS glass powder and add a mixture of Si and C, and use a planetary ball mill for 5 hours. Material: ball: absolute ethanol is 1: 3: 2 (mass ratio), vacuum drying (first temperature 50 ℃, time 6 hours; then temperature 120 ℃, ti...
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