摘要
以三聚氰胺和氧化硼为原料,利用真空热处理和高温高压技术,对BCN化合物的形成及结构进行了研究。在真空条件下,原料经1 100 K热处理得到非晶BCN的前驱物,将前驱物在5.0 GPa1、500 K条件下高温高压热处理30 min,合成出了单相的六角BCN晶体。采用Materials Studio软件的Reflex模块对样品的X射线衍射图谱进行分析,结果表明,得到的样品为纯的六角相,晶格常数为a=0.250 5 nm,c=0.665 9 nm。对样品进行了透射电镜(TEM)分析,得到了样品的形貌和电子衍射,同样证实了样品为六角BCN晶体,晶粒尺寸约200 nm。对样品进行了XPS表征,确定了样品中存在C—C、C—N、C—B、N—B键,表明B、C、N三元素之间达到了原子级化合,样品的组分含量通过EDX进行标定。
h-BCN compounds were synthesized with C3H6N6 and B2O3 as raw materials,combined with heat treatment,high pressure and high temperature.An amorphous BCN precursor was prepared at 1 100 K under vacuum.Annealed for 30 min,at 1 500 K under 5.0 GPa,the amorphous BCN precursor crystallizes into hexagonal BCN compound with lattice constants of α=0.250 5 nm,c=0.665 9 nm determined by using the reflex module combined in the Materials Studio program analysis.The shape and SAD of sample also approved that the sample was h-BCN crystal by TEM analysis.The grain size about was 200 nm.XPS analysis was applied for the sample.The results confirmed bending energy of C—C,C—N,C—B,N—B.It indicated atom level chemical combination of BCN.The composition and content of the sample were analyzed by EDX.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2007年第3期237-241,共5页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(50334030)
国家重点基础研究发展计划(2001CB711201)
教育部科学技术研究重点项目(03057)
关键词
高温高压
h-BCN
前驱物
high temperature and high pressure
h-BCN
precursor
