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孔径可控微米级氧化铝直通孔陶瓷的制备

DOI: 10.7521/j.issn.0454-5648.2014.03.01

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Abstract:

采用海藻酸钠自组装法制备不同孔径和气孔率的氧化铝直通孔陶瓷,研究了海藻酸钠种类和陶瓷浆料固相含量对孔径的影响。结果表明选用高α-L-古罗糖醛酸含量的海藻酸钠,并适当增大固相含量,可制备出小孔径直通孔陶瓷;选用高β-D-甘露糖醛酸含量的海藻酸钠,并适当降低固相含量,可制备出大孔径直通孔陶瓷。通过调节浆料固相含量和海藻酸钠溶胶浓度,制备的直通孔陶瓷孔径分布为25~250μm,最高气孔率为67.0%,抗压强度最高可达212.3MPa。

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