硅酸盐学报

冲击波合成立方氮化硅

作者：姚怀徐巧玉唐敬友唐翠霞

单位：河南科技大学材料科学与工程学院河南科技大学机电工程学院西南科技大学材料科学与工程学院西南科技大学材料科学与工程学院河南洛阳471003 河南洛阳471003 四川绵阳621010 四川绵阳621010

关键词：冲击压缩平面飞片装置立方氮化硅合成

分类号：TQ174.1

出版年,卷(期):页码：2008,36(1):6-10

DOI：

摘要：

以α-Si3N4粉体作原材料,采用平面飞片加载装置和样品回收装置进行了冲击波压缩合成实验,完整地回收到c-Si3N4,其单次合成出的c-Si3N4达到克量级。在40GPa,3600K或在65GPa,6200K的条件下,都有c-Si3N4生成;在45～55GPa,4000～4500K的条件下,c-Si3N4的转化率比较高,最高可达80%。在冲击波合成c-Si3N4的过程中,伴随着生成一定量的β-Si3N4。合成出的c-Si3N4粉体团聚体的颗粒尺寸约为1μm。

An apparatus including a planar metal disc flyer and a cylindrical chamber driven by explosives was designed to shock-wave synthesize cubic silicon nitride using α-Si3N4 powders as starting materials. About 1 g c-Si3N4 can be obtained in each test using the apparatus. When the pressure was up to 40 GPa (or 65 GPa) and the temperature was 3 600 K (or 6 200 K), c-Si3N4 can be synthesized. The ratio of transformation from α-Si3N4 to c-Si3N4 approached 80% at pressures from 45 GPa to 55 GPa and temperatures from 4 000 K to 4 500 K. In the synthesized products, a small amount of β-Si3N4 was observed. The c-Si3N4 powders obtained were conglomerated to particles of about 1 μm in size.

基金项目：

国家自然科学基金(50472102);; 西南科技大学引进人才基金(ZK043030)资助项目。

作者简介：

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