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基于Al-SiO2-蔗糖体系制备空心陶瓷微珠

, PP. 174-178

Keywords: 团聚粉,Al2O3-Si,空心陶瓷微珠,自反应淬熄法,陶瓷熔滴

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Abstract:

以Al-SiO2-蔗糖为反应体系,利用自反应淬熄法合成了Al2O3-Si复相空心陶瓷微珠,研究了其形成机制。结果表明,熔射产物由球形、类球形和不规则粉状物三类颗粒组成,球形颗粒和类球形颗粒为内部空心结构,由Al2O3-Si复相以及可能含有的少量未反应SiO2组成,粉状物由SiC、C与可能含有的SiO2和发生反应但未成球的颗粒组成。高的反应放热量与快的反应速率有利于陶瓷熔滴的形成,C氧化产生的大量气体是形成内部空心结构的关键,3个因素共同决定着空心陶瓷微珠的形成。

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