The influence of hBN crystallinity and additive Lithium hydride on cBN synthesis in Li3N-hBN system

被引：8

作者：

Du, Yonghui ^{[1
]}

Ji, Xiaorui ^{[1
]}

Yang, Xuxin ^{[1
]}

Gong, Xiliang ^{[1
]}

Yang, Dapeng ^{[1
]}

Su, Zuopeng ^{[1
]}

Zhang, Tiechen ^{[1
]}

机构：

[1] Jilin Univ, Natl Lab Superhard Mat, Changchun 130012, Peoples R China

来源：

关键词：

crystallinity; lithium hydride; high pressure and temperature;

D O I：

10.1016/j.diamond.2006.12.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the influence of hBN crystallinity and additive Lithium hydride (LiH) on cBN synthesis with Lithium nitride (Li3N) as catalyst was investigated under the pressure of 4.5-5 GPa and the temperature of 1500-1700 degrees C. hBN with different crystallinities was obtained by the same hBN. Some were explored to high pressure and high temperature, and others were subjected to heat treatment with alkali. X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectronic spectroscopy (XPS) were used to characterize the property of the starting materials. The synthesized samples were observed by optical microscopy (OM). The results indicated that besides the crystallinity of hBN, which is a general parameter for controlling the structural quality of hBN powders, some other factors such as the content of B+ at the surface of hBN and additive LiH all strongly influence the synthesis of cBN. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1475 / 1478

页数：4

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