含硅原料对合成氮氧化硅粉末的影响

本文通过对比实验，分别以（１）天然石英粉（２）硅酸钠（３）碳酸钠与天然石英粉（４）活性ＳｉＯ２等为原料合成氮氧化硅（Ｓｉ２Ｎ２Ｏ）粉末，实验结果表明：直接碳热还原氮化天然石英粉，难以合成Ｓｉ２Ｎ２Ｏ。而以（２），（３）两种原料虽然能合成较纯的Ｓｉ２Ｎ２Ｏ粉末，且工艺简单，但原料中ＳｉＯ２含量太低，应用价值不大，而用活性ＳｉＯ２为原料，能合成较高纯度的Ｓｉ２Ｎ２Ｏ尽管工艺较（２），（３）复杂，但此法

EFFECT OF VARIOUS SOURCES OF SiO_2 ON THE SYNTHESIS OF Si_2N_2O

Used various of sources of SiO2, Si2N2O was prepared by carbothermal reduction and nitridation of SiO2. Thesesoures of SiO2 were: (A)natural quartz powder; (B) Na2SiO3; (C) natural quartz powder mixed Na2CO3, and (D) ac-tivated SiO2. The following conclussions could be obtained by comparing the experiment results: (1) It is difficult tosynthesize Si2N2O from Source (A); (2) Although the process in which Source (B) was used would be simplier andthe purity of Si2N2O synthesized by using Source (C) would be higher, it was difficult to synthesize Si2N2O fromSource (B) and (C) in industry, because the SiO2 contents in Source (B) and (C) were too low; (3) Not only thepurity of Si2N2O synthesized from activated SiO2 would be higher, but also the synthesizing process was more valu-able in industrial application, although the process was more difficult than both process in which deurce (A) and (B)were used, respectively.