化学气相沉积法制备硼掺杂玻璃炭材料(英文)  

Boron-doped glassy carbon fabricated by chemical vapor deposition

作　　者：许力[1] 吴峻峰[1] 白朔[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,辽宁沈阳110016

出　　处：《新型炭材料》2012年第3期226-232,共7页New Carbon Materials

基　　金：National Natural Science Foundation of China(50702062)~~

摘　　要：以甲烷和三氯化硼的混合气为反应气体,采用化学气相沉积法制备硼掺杂玻璃炭材料。利用X射线衍射仪、拉曼光谱仪、扫描和透射电子显微电镜对沉积产物的微观结构进行表征。结果表明,沉积产物是一种玻璃炭材料,但在其基体中均匀分布着约20 nm的碳化硼颗粒。由于硼元素强烈的催化石墨化作用,硼掺杂玻璃炭表现出完全不同于传统玻璃炭材料的石墨化行为。硼掺杂玻璃炭经高温热处理后,其结构发生剧烈变化而转变为片层炭结构,其转变过程可能遵循"固溶-析出"机制。A boron-doped glassy carbon was fabricated by chemical vapor deposition from a gaseous CHJBC13 mix- ture. It was characterized by X-ray diffraction, Rarnan spectroscopy, scanning, and transmission electron microscopy. Results show that the deposited carbon is characteristic of a glass-like carbon but with boron carbide nanocrystals around 20 nm in diameter uniformly distributed in its matrix. In contrast to the conventional non-graphitizable glassy carbon, the product behaved similarly to a graphitizable carbon on high-temperature treatment because of the strong catalytic graphiti- zation effect of the boron. The glass carbon was transformed into lamellar carbon structures, probably by a dissolution- precipitation mechanism.

关 键 词：硼 玻璃炭 化学气相沉积法 微观结构 

分 类 号：TB321[一般工业技术—材料科学与工程]