摘要
对硅粉在低压氮气中的高温自蔓延合成（ＳＨＳ）Ｓｉ３Ｎ４粉末过程进行了探讨，实验证明了０．６ＭＰａ－０．７ＭＰａ的低氮气压下燃烧合成Ｓｉ３Ｎ４的可行性，超始原料中加人适量的Ｓｉ３Ｎ４粉作稀释剂，可促进Ｓｉ粉向Ｓｉ３Ｎ４的氨化转变。产物为１μｍ～２μｍ纯度较高的Ｓｉ３Ｎ４粉，燃烧温度随氮气压力与孔隙率而变化，而随配料组成的变化不明显。
The self-propagating high-temperature Synthesis of silicon nitride powder from siliconpowder under low nitrigen pressure has been investigated. The feasibility of perparing silicon nitrideby conbustion synthesis reaction under nitrigen pressure 0. 6MPa-0.7MPa is demonstrated. Addition(diluent) of Si3N4 powder to the starting Si promoted conversion of the teactants to homogeneous andfine silicon nitride particles. Silicon nitride powders free from residual Si with size distribution aroud1μm-2μm were obtained. The maximum combustion temperature increased with mitrigen pressureand the porosity of starting powder compact, and is independent on the recipe of the raw materials.
出处
《陶瓷工程》
1999年第4期4-8,28,共6页
Ceramics Engineering
关键词
燃烧合成
硅粉
氮化硅粉
低氮气压
特种陶瓷
Combustion Synthesis(SHS) Si Powder Silicon Nitride Powder Low Nitrogen Pressure.
