In order to investigate the effect of in situ synthesized CaZrO3 on the properties of magnesia-zirconia material,calcium carbonate and desilicated zirconia(combined addition of 10% ,20% ,30% ,respectively)were mixed with fused magnesia,formed,dried,and then calcined with heat preservation for 3 h at 1600 and 1 700℃ ,respectively.The bulk density,apparent porosity,perma-nent linear change when heated,cold crushing strength,thermal shock resistance,slag resistance of the sintered samples was investigated,and the phase composition of the samples were analyzed.The results showed as follows that at the same temperature,with the increase of total addition of calcium carbonate and desilicated zirconia,the bulk density and cold crushing strength of the the sintered sam-ples gradually decreased,and the apparent porosity and line shrinkage gradually increased.At the same addition amount,with the increase of temperature,the bulk density,the linear shrinkage rate and cold crushing strength of the sintered samples gradually increased,and the apparent porosity grad-ually decreased.When the calcination temperature was 1 600℃ and the amount of total addition of calcium carbonate and desilicated zirconia was 10% ,the samples had the best thermal shock resist-ance.When the calcination temperature was 1 700℃ and the amount of total addition of calcium car-bonate and desilicated zirconia was 10% ,the samples had the best slagging resistance.
in situ synthesiscalcium zirconatemagnesia-zirconia material
维普
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