Li_3N、Mg_3N_2、Ca_3N_2催化作用的比较和分析  

Study on the Catalytic Function of Li_3N,Mg_3N_2,Ca_3N_2

作　　者：徐晓伟[1] 李玉萍[1] 赵红梅[1] 范慧俐[2] 张永杰[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京科技大学应用科学学院,北京100083

出　　处：《高压物理学报》2003年第2期141-144,共4页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金 (5 9972 0 0 3 );山东大学国家重点实验室开放经费资助

摘　　要：Li3N、Mg3N2 和Ca3N2 是高温高压下以hBN为原料合成cBN的催化剂。在实验中发现它们对常压高温下生成hBN的反应也表现出催化作用。对比了三种氮化物催化效果的差异 ,发现三种氮化物都只有在熔融状态下才能表现出催化效果 ,以及三种氮化物对生成hBN反应的催化效果与它们在高温高压下合成cBN反应的催化效果次序相似。It is well known that Li 3N,Mg 3N 2 and Ca 3N 2 are catalysts for cBN synthesis under high temperature and high pressure.We discovered that they could also act as catalysts for hBN formation at high temperature and normal pressure.It is confirmed that,from a series comparative experiments, each of them has catalysts effect only on melting condition,the catalytic order for hBN formation is Li 3N>Mg 3N 2>Ca 3N 2,which is similar to that for cBN synthesis.The suggestion that a catalyst for hBN formation may also be a catalyst for cBN synthesis may be reliable.

关 键 词：Li3N Mg3N2 Ca3N2 催化作用 比较分析 催化剂 氮化锂 氮化镁 氮化钙 高温高压 

分 类 号：O643.36[理学—物理化学]