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摘要: 用高分辨率(0.2 nm)电子显微镜,对hBN-触媒体系经高温高压处理后的产物观察中,看到尺寸约为30 nm的微小颗粒,经电子衍射方法判定其具有纤锌矿结构,为wBN的雏形晶粒。Abstract: In the present paper, embryonic form of wBN crystal was observed in hBN-catalyst system after treatments under static high pressure(~5.0 GPa) and high temperature (~1500 ℃), the size of the embryonic crystal was about 20~30 nm. It is larger than the critical nuclei and smaller than the critical crystal. The phase of wBN was determined by the electron diffraction.
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Key words:
- EMS /
- wBN /
- embryonic crystal
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Wentorf R H Jr. J Chem Phys, 1957, 26: 956. Bundy F P, Wentorf R H Jr. J Chem Phys, 1963, 38: 1144. 张铁臣, 于三, 郭伟力, 等. 高压物理学报, 1996, 10(1): 76-80. Фрацевича И Н. Сверхтвёр Матер. Киев: Наукова Думка, 1980: 143-149. -
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