Fundamental studies on the comparison between ultrafine particles produced in laboratory and grains produced in universe.

实验室产生的超细粒子与宇宙产生的颗粒比较的基础研究。

• 批准号: 07409007
• 负责人: KAITO Chihiro
• 金额: $ 12.16万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07409007/
• 关键词: Ultrafine particle; Interstellar dust; Crystal; Amorphous; QCC; Silicon Carbide; Functional quantum Ball; 非品質; 赤外線スペクトル; 形; 電子顕微鏡; 酸化物; 欠陥; 構造; 微粒子; 非晶質酸化ケイ素; 酸化マグネシウム; サイズ; アルミナ; 赤外吸収; 電子顕微鏡法; 非晶質カーボン; グラファイト; シリコンカーバイド; 外形効果

It becomes evident through out present experiments that the structure of particles produced in laboratory becomes key point to elucidate the spectra observed in space. These experiments are increasing interest for the shake of discovery of pre-solar grains such as diamond, graphite, SiC, TiC, MoC, ZrC, Al_2O_3 and Si_3N_4. Since these materials are non volatile, having polymorphism, and amorphous substance, the reading of the structure becomes difficult, which is the origin to diffuse the spectroscopy, In the present project, size, shape and defect effects on the. spectroscopy have been elucidated for some materials. If the size of the particles decreased, the directions of diffusion atom were changed (Size effect). In the growth of SiC, it becomes evident that SiC can be produced by the reaction between Si and carbon even at room temperature. In addition to proceedings .of grain formation work shops, Proceedings of Antactic meteorites, 22 papers and 2 submitted papers have been collected on these reports. Results on carbon, diamond, SiC, SiO, Al_2O_3, MgO are also contained. The next developing direction of research has been seen from the present results.

通过目前的实验，很明显，实验室产生的粒子结构成为阐明太空中观察到的光谱的关键点。这些实验越来越引起人们对金刚石、石墨、SiC、TiC、MoC、ZrC、Al_2O_3 和 Si_3N_4 等前太阳颗粒的发现的兴趣。由于这些材料是非挥发性的、具有多晶型和无定形的物质，结构的读取变得困难，这就是扩散光谱的起源，在本项目中，尺寸、形状和缺陷对其产生影响。某些材料的光谱学已得到阐明。如果颗粒尺寸减小，扩散原子的方向就会改变（尺寸效应）。在SiC的生长中，很明显即使在室温下也可以通过Si和碳之间的反应来生成SiC。这些报告除了谷物形成研讨会的会议论文集外，还收集了安泰克陨石会议论文集、22篇论文和2篇已提交的论文。还包含碳、金刚石、SiC、SiO、Al_2O_3、MgO 的结果。从目前的结果可以看出下一步研究的发展方向。

项目成果

N.Suzuki: "A New Attempt to Produce a Functional Quantum Ball from Ultrafine Particles" Phys.Low-Dim.Struct.3/4. 55-64 (1998)

N.Suzuki：“用超细粒子生产功能性量子球的新尝试”Phys.Low-Dim.Struct.3/4。

Y.Saito: "Size control of carbon grains and their optical properties" Planet.Space Sci.Vol.43, Nos.10/11. 1303-1309 (1995)

Y.Saito：“碳颗粒的尺寸控制及其光学特性”Planet.Space Sci.Vol.43，Nos.10/11。

S.Komura etal.: "Size effect of aluminium Ultrafine Particles on Formation of Alumina Phase" Antarctic Meteorite XXI. 21. 70-73 (1996)

S.Komura 等人：“铝超细颗粒对氧化铝相形成的尺寸效应”南极陨石 XXI。

C.Kaito: "Growth of SiC grains by gas evaporation method and relationship between optical properties and structure of SiC grains" Planet.Space SCI.Vol.43, Nos.10/11. 1271-1281 (1995)

C.Kaito：“通过气体蒸发法生长 SiC 晶粒以及 SiC 晶粒光学性质与结构之间的关系”Planet.Space SCI.Vol.43，Nos.10/11。

C.Kaito: "Structure and Stability of Metallic Dots Covered with Amorphous Silicon Oxide or Carbon" Phys.Low-Dim.Struct.9/10. 115-126 (1998)

C.Kaito：“覆盖有非晶硅氧化物或碳的金属点的结构和稳定性”Phys.Low-Dim.Struct.9/10。