本研究采用一种快速凝胶的氮化铝凝胶通过在氮气气氛下烧结制备A1N陶瓷.将AlN粉体、少量的Y2O3粉体(烧结助剂)和去离子水以一定比例混合制得A1N浆料,在浆料中加入一种新型的水溶性共聚物Isobam(由异丁烯和马来酸酐形成的共聚物)作为交联剂,所得浆料在室温空气中自发凝胶成型.研究了Isobam和A1N、Y2O3粉体表面的有机包裹剂聚亚氨酯对浆料流变性能和凝胶性能的影响.结果表明,加入0.3wt％ Isobam可制备出固含量达52vo1％的低粘度(0.2 Pa·s)A1N浆料.将凝胶干燥并脱粘,获得的A1N素坯在氮气气氛下1800℃烧结4h,可制备出鳍状A1N陶瓷,所得陶瓷的密度为3.33 g/cm3,热导率为204 W/(m·K).
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