DISCRETE STEPS OF DIAMOND-GRAPHITE PHASE TRANSITION AT ANNEALING OF NANODIAMONDS IN WIDE TEMPERATURE RANGE

被引：0
|
作者：
Kornienko, N. E. [1 ]
Kirichenko, A. N. [2 ]
机构：
[1] Taras Shevchenko Natl Univ Kyiv, Fac Phys, Dept Theoret Phys, Volodymyrska Str 64-3, UA-01601 Kiev, Ukraine
[2] FSBI TISNCM, Dept Struct Res, Tsentralnaya Str 7a, Moscow 108840, Russia
来源：
IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA I KHIMICHESKAYA TEKHNOLOGIYA | 2016年 / 59卷 / 09期
关键词：
diamonds anneling; vibration D and G bands; spectral components; phase transition discreate steps;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We present the short review of the works on a problem of phase transitions (PT) which are distributed in the temperature range Delta T of PT. Experimental studies of Raman spectra (laser wavelength 514.5 nm) of nanodiamonds after annealing at 900-2000 degrees C and their detailed numerical analysis with decomposition of the allocated oscillatory D and G bands on the compound spectral components D and G, D (k) and G (k') relating to various states of Brillouin's zones were conducted. Detection of temperature maxima of intensities, frequencies and full width at half maximum (FWHM) of individual Raman components as well as intensity of a background defines discrete steps of PT of diamond - onion-shaped carbon in temperature ranges of 940-1200 degrees C and 1500-2000 degrees C.
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页码：50 / 56
页数：7
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