高岭土的化学组成对碳热还原-氮化法合成β′-sialon粉末的影响

INFLUENCE OF CHEMICAL COMPOSITION OF KAOLIN ON SYNTHESIZED β ′-SIALON POWDER BY CARBOTHERMAL REDUCTION-NITRIDATION REACTION

研究了以不同化学组成的高岭土为主要原料并采用碳热还原－氮化法合成的ｓｉａｌｏｎ粉末的相组成．结果表明：合成粉末的物相组成及β′－ｓｉａｌｏｎ的Ｚ值与高岭土的ｍ（ＳｉＯ２）／ｍ（Ａｌ２Ｏ３）比值密切相关．

β ′-sialon powder was synthesized with different kaolins through carbothermal reduction-nitridation reaction. The products were analysed using X _ray diffraction. It shows that the phase composition and the Z _value of β ′-sialon are affected significantly by the ratio of m (SiO 2)/ m (Al 2O 3) of kaolin.