检索结果-南通市图书馆

Plasma Science and Technology 2017年第3期19卷 93-97页

作者： A F POPOvICH v G ralchenko v K BALLA A K MALLIK A A KHOMICH A P BOLSHAKOv D N SOvYK E E ASHKINAZI v Yu YUROv Institute of Radio Engineering and Electronics of Russian Academy of Sciences Fryazino 141190 Russia General Physics Institute of Russian Academy of Sciences Moscow 119991 Russia Harbin Institute of Technology Harbin 150001 People's Republic of China National Research Nuclear University MEPhI Moscow 115409 Russia Central Glass and Ceramic Research Institute Kolkata 700 032 India

Polycrystalline diamond（PCD） films 100 mm in diameter are grown by 915 MHz microwave plasma chemical vapor deposition（MPCvD） at different process parameters,and their thermal conductivity（TC） is evaluated by a laser flash technique（LFT） in the temperature range of230-380 *** phase purity and quality of the films are assessed by micro-Raman spectroscopy based on the diamond Raman peak width and the amorphous carbon（a-C） presence in the *** and increasing dependencies for TC with temperature are found for high and low quality samples,***,as high as 1950 ± 230 W m-1 K-1 at room temperature,is measured for the most perfect material.A linear correlation between the TC at room temperature and the fraction of the diamond component in the Raman spectrum for the films is established.

关键词： thermal conductivity polycrystalline diamond microwave plasma chemical vapordeposition Raman spectroscopy

维普期刊数据库

Nitrogen-Doped Chemical vapour Deposited Diamond： a New Material for Room-Temperature Solid State Maser

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第7期24卷 2088-2090页

作者： N. A. Poklonski N. M. Lapchuk A. v. Khomich 吕反修唐伟忠 v. G. ralchenko I. I. Wlasov M. v. Chukichev Sambuu Munkhtsetseg Department of Physics Belarusian State University Minsk 220030 Belarus v. A. Kotelnikov Institute of Radio Engineering and Electronics Russia Academy of Sciences Fryazino 141191 Russia School of Material Science and Engineering University of Science and Technology Beijing Beijing 100083 A. M. Prokhorov General Physics Institute Russia Academy of Sciences Moscow 119991 Russia Department of Physics M. V. Lomonosov Moscow State University Moscow 119899 Russia National University of Mongolia Ulaanbaatar 210646 Mongolia

Electron spin resonance （ESR） in polycrystalline diamond films grown by dc arc-jet and microwave plasma chemical vapour deposition is studied. The films with nitrogen impurity concentration up to 8 × 10^18 cm^-3 are also characterized by Raman, cathodoluminescence and optical absorption spectra. The ESR signal from P1 centre with g-factor of 2.0024 （nitrogen impurity atom occupying C site in diamond lattice） is found to exhibit an inversion with increasing the microwave power in an H102 resonator. The spin inversion effect could be of interest for further consideration of N-doped diamonds as a medium for masers operated at room temperature.

关键词： ELECTRON-SPIN RESONANCE SYNTHETIC DIAMOND SINGLE-CRYSTAL EPR SIGNAL FILMS CATHODOLUMINESCENCE DEFECTS CvD MORPHOLOGY ENERGY

甲烷浓度对CvD金刚石薄膜晶体学生长过程的影响

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

无机材料学报 2007年第3期22卷 570-576页

作者：朱宏喜毛卫民冯惠平吕反修 vlasov I I ralchenko v G Khomich A v 北京科技大学材料学系 General Physics Institute Russia Academy of SciencesMoscow 119991 Russia Institute of Radio Engineering & Electronics Russia Academy of SciencesFryazino 141190 Russia

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、微区晶界分布和表面形貌．研究了金刚石晶体{100}面和{111}面生长的晶体学过程．研究表明,{100}面通过吸附活性基... 详细信息

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、微区晶界分布和表面形貌．研究了金刚石晶体{100}面和{111}面生长的晶体学过程．研究表明,{100}面通过吸附活性基团CH2 2-,而{111}面通过交替吸附活性基团CH3 -和CH3-后脱氢堆积碳原子．低甲烷浓度时,{111}面表面能低于{100}面,使{111}面生长略快于{100}面．甲烷浓度升高,动力学作用增强使{100}面生长明显快于{111}面,使金刚石薄膜产生{100}纤维织构;同时显露的{100}面平行于薄膜表面,竞争生长使位于晶体侧面的{111}面由于相互覆盖而减小,形成了不同于单晶体自由生长的薄膜表面形貌组织．

关键词：金刚石薄膜织构晶体生长表面形貌组织

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

CvD金刚石薄膜孪晶形成的原子机理分析

物理学报 2007年第7期56卷 4049-4055页

作者：朱宏喜毛卫民冯惠平吕反修 I.I.vlasov v.G.ralchenko A.v.Khomich 北京科技大学材料学系北京100083 General Physics Institute Russia Academy of Sciences Institute of Radio Engineering & Electronics Russia Academy of Sciences

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、晶界分布和表面形貌.研究了一阶孪晶在金刚石晶体{111}面生长的原子堆垛过程.结果表明,由于一阶孪晶〈111〉60°... 详细信息

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、晶界分布和表面形貌.研究了一阶孪晶在金刚石晶体{111}面生长的原子堆垛过程.结果表明,由于一阶孪晶〈111〉60°的取向差关系以及{111}面的原子堆垛结构,使{111}面上容易借助碳原子的偏转沉积产生一阶孪晶.低甲烷浓度时,碳原子倾向于在表面能较低的{111}面沉积,为孪晶的形成提供了便利,且高频率孪晶使薄膜织构强度减弱.甲烷浓度升高使生长激活能较小的{001}面成为主要前沿生长面,因而只有〈001〉晶向平行薄膜法向的晶粒能够不断长大,因此孪晶形核概率明显减小.另外,在薄膜中发现二阶孪晶,并对二阶孪晶的形成进行了分析.

关键词：金刚石薄膜孪晶原子机理取向差

维普期刊数据库

COATING FORMATION vIA METAL IGNITION BY CW CO2 LASER BEAM

在线全文

学校读者我要写书评

暂无评论

COATING FORMATION VIA METAL IGNITION BY CW CO2 LASER BEAM

International Conference on Millimeter Wave and far-Infrared Technology

作者： v.I.Konov v.G.ralchenko Institute of General Physics USSR Academy of Sciences Moscow 117942 Vavilov str. 38 USSR Institute of General Physics USSR Academy of Sciences Moscow 117942 Vavilov str. 38 USSR

＜正＞ Introduction Laser induced chemical reactions of metals with gases can be success-fully used for surface compounds folmation, icluding oxides, nitrides,carbides etc. Some of these reactions deliberate a large amount of heat,leading to laser assisted combustion （LAC） of metals [1,2]. Only fewattemptes [3,4] were made to measure exothermic power during LACprocess. The properties of oxide films obtained at very high growthrates upon cw irradiation are not studied sufficiently.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

大尺寸单晶金刚石同质连接技术

自然杂志 2019年第2期41卷 100-110页

作者：舒国阳 ralchenko v. Bolshakov A. 刘康孙明琪姚凯丽赵继文高鸽刘本建王伟华李一村刘雪冬代兵朱嘉琦哈尔滨工业大学特种环境复合材料技术国家级重点实验室俄罗斯科学院普通物理研究所

介绍了制备人造单晶金刚石的技术途径及发展现状,重点讨论并对比了几种化学气相沉积法(CvD)金刚石制备技术的优缺点,详细阐述了基于微波等离子体CvD (MPCvD)法的同质连接技术——一种突破晶体尺寸限制,实现大尺寸单晶金刚石的有效途径... 详细信息

介绍了制备人造单晶金刚石的技术途径及发展现状,重点讨论并对比了几种化学气相沉积法(CvD)金刚石制备技术的优缺点,详细阐述了基于微波等离子体CvD (MPCvD)法的同质连接技术——一种突破晶体尺寸限制,实现大尺寸单晶金刚石的有效途径。通过该技术实现了英寸级单晶金刚石晶片的制备,并针对横向生长、界面质量及演化、三维结构连接控制等核心科学技术问题进行了分析和讨论,展望了其在尖端应用领域的发展前景。

关键词：人造金刚石单晶微波等离子体化学气相沉积同质连接