采用莰烯基冷冻浇注成型工艺制备了氧化铝定向贯通直孔结构的多孔陶瓷.借助DNJ-1型旋转式粘度计、扫描电子显微镜、显气孔率容重测试仪等表征方法,研究了固含量对料浆粘度的影响、坯体升华干燥行为随时间变化的影响、固含量与孔隙率的关系以及氧化铝多孔陶瓷孔的方向和断面显微结构.结果表明:在固含量为10～50vol%范围内的料浆,经冷冻干燥,在1650 ℃下烧成,制备出了平均孔径在10～50 μm、气孔率在14%～78%、固含量为10vol%时,抗压强度高达15.6 MPa的氧化铝定向贯通直孔结构的多孔陶瓷,并且固含量与孔隙率呈线性关系.
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