【摘 要】
：
This paper reprots that with Ni-based catalyst/solvent and with a dopant of NaN3>, large green single crystal diamonds with perfect shape are successfully synth
【机 构】
：
National Lab of Superhard Materials, Jilin University, Jilin 130012, China“,”Henan Polytechnic Unive
论文部分内容阅读
This paper reprots that with Ni-based catalyst/solvent and with a dopant of NaN3>, large green single crystal diamonds with perfect shape are successfully synthesized by temperature gradient method under high pressure and high temperature in a China-type cubic anvil high-pressure apparatus (SPD-6×1200), and the highest nitrogen concentration reaches approximately 1214-1257 ppm calculated by infrared absorption spectra. The synthesis conditions are about 5.5 GPa and 1240-1300℃. The growth behaviour of diamond with high-nitrogen concentration is investigated in detail. The results show that, with increasing the content of NaN3> added in synthesis system, the width of synthesis temperature region for growth high-quality diamonds becomes narrower, and the morphology of diamond crystal is changed from cube-octahedral to octahedral at same temperature and pressure, the crystal growth rate is slowed down,nevertheless, the nitrogen concentration doped in synthetic diamond increases.
其他文献
试验采用氮磷钾3因素4水平“3414”设计,以当前甜菜生产主栽品种KWS0143为试验材料,系统研究了不同处理条件下单株光合速率、叶绿素含量、叶面积和氮素代谢关键酶在生育期期间的动态变化,分析各酶间的活性变化关系及其对甜菜产质量的影响；研究氮磷钾营养元素对甜菜光合特性和氮代谢关键酶活性的调控规律。本研究可为甜菜生理研究提供基础性资料,为提高肥料利用率、制定合理栽培措施,提供理论依据。研究结果如下：
Using unitary transformations, this paper obtains the eigenvalues and the common eigenvector of Hamiltonian and a new-defined generalized angular momentum (Lz)
<正> 开始工作的头一天,我走进《芝加哥论坛报》的新闻部时,看见的是一片揉皱的白衬衫上面男人面孔的海洋。简直象话剧《头版》场景的再现:一些记者叼着雪茄,还有几个编辑戴着绿色的眼罩。那是1968年。四年之后我离开该报时,情况还是没什么变化。所以我对该报的性别歧视提出了指控。然而十二年后的今天,《论坛报》的采访记者已经有29%是妇
小麦低分子量麦谷蛋白（LMW-GS）是小麦种子储藏蛋白的主要组成部分，是决定小麦面团粘弹特性的关键因素之一，对小麦的加工品质具有重要影响。由于低分子量麦谷蛋白亚基是一个多基因家族，其基因拷贝数多，分子量小，且在电泳图谱上与醇溶蛋白相互重叠，利用SDS-PAGE等传统方法很难有效的分离鉴定一个小麦品种中的所有LMW-GS亚基，尤其是对大量种质材料的LMW-GS亚基鉴定工作来说更是困难。LMW-GS基
TiO2 nano powders with Mn concentration of 0 at%-12 at% were synthesized by the sol-gel process, and were annealed at 500 ℃ and 800 ℃ in air for 2 hrs. X-ray
为了解石油烃污染对水生生物生长、繁殖和发育的影响,采用实验生态学方法研究了润滑油对蒙古裸腹溞 Moina mongolica的急性毒性和慢性毒性.结果表明:润滑油对蒙古裸腹溞的24
2008年5月12日,中国四川省汶川地区发生了里氏8.0级特大地震。一年多后的2009年8月7日晚11时45分,强台风“莫拉克”在台湾东海岸中段的花莲以每秒40米的速度正式登陆,并由风
This paper is conceed with the problem of robust H∞ control for structured uncertain stochastic neural networks with both discrete and distributed time varying
This paper presents theoretical computations of the ionization rate of Rydberg lithium atom above the classical ionization threshold using semiclassical approxi