【摘要】 本实验通过采用流延成型工艺制备碳化硅多孔陶瓷过滤材料 ,经过比较分析总结出pH值对泥浆性能的影响 ,当浆料的pH值为 7-9时出现大量絮状物 ,导致流动性和悬浮性能都很差 ,当浆料的pH值小于 7时 ,浆料的流动性急剧下降 ,导致无法流延。合适的浆料pH值范围为 >11。流延成型后的试样经过干燥脱模后在 95 0～ 12 5 0℃温度下烧结 ,制得气孔率随着烧成温度的不同而变化的样品 ,其中在 10 5 0℃ ,样品最高气孔率为 5 2 %,通过SEM观察 ,10 5 0℃的制品的孔径平均在 6.5 μm左右 ,气孔分布均匀 ,气孔通道类型微直通道 ,而且成网状结构分布更多还原

【Abstract】 Tape casting method was employed to prepare porous SiC ceramics.The effect of pH value on the taping properties was investigated.It was found that precipitates appeared in the suspension at pH 7-9 and the suspension showed lower flowability.It could be formed freely at pH>11.The samples were sintered at 950-1250℃ for 2h.The porosity of the sample sintered at 1050 was about 52%.The average pore diameter was 6.5μm.更多还原