采用平均粒径约为10 μm的Ca-ZrO2粉和直径为0.2~1 mm的Ca-ZrO2空心球,选择适当的比例分数,经叠层模压成型后进行常压烧结,成功制备了具有密度梯度的氧化锆多孔陶瓷,并对构成叠层样品的粉球比为50∶50~90∶10试样的密度、抗压强度、显微结构、物相等进行了表征.结果表明,对于单配比试样,在相同烧结温度下其密度和抗压强度显著依赖于ZrO2粉和ZrO2空心球的比例分数,ZrO2粉的含量越高,试样的密度和抗压强度越高;其中1700 ℃烧结的样品,其密度由粉球比为50∶50试样的3.18 g/cm3变化到粉球比为90∶10试样的3.65 g/cm3,相应地其抗压强度则由49MPa变化到130MPa.
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