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以南宁维罗高岭土为原料,分别利用精细化高岭土和原矿作原料,采用碳热法,在1450℃经氮化合成一定质量分数β-sialon粉体。对氮化工艺过程和合成产品的物相进行分析。结果表明:采用精细化高岭土和原矿均可生成一定质量分数β-sialon粉体;以不同原料合成的产品中,杂相铝硅酸盐含量有明显不同;添加适量Fe_2O_3可抑制铝硅酸盐含量。用精细化处理的高岭土为原料,N_2平均流量为112.5L/min时,合成的β-sialon粉体含量高,产品中的铝硅酸盐、莫来石和β-sialon的质量比为1:0.5:1.5。
Taking Nanning Verona kaolin as raw material, fine kaolin and raw ore were respectively used as raw materials and a certain mass fraction of β-sialon powder was synthesized by carbothermal method at 1450 ℃. Nitriding process and synthesis of the product phase analysis. The results show that: the use of refined kaolin and ore can produce a certain mass fraction of β-sialon powder; different raw materials synthesized products, heterogeneous aluminosilicate content significantly different; add appropriate amount of Fe_2O_3 can inhibit the content of aluminosilicate . Using refined kaolin as raw material, the average content of N_2 is 112.5L / min, the content of synthesized β-sialon powder is high, the mass ratio of aluminosilicate, mullite and β-sialon in the product is 1: 0.5 : 1.5.