Development of ultrahigh pressure apparatus based on high pressure produced by constraining expansion due to breaking of bonds between atoms and between molecules
开发基于由于原子间和分子间键断裂而约束膨胀而产生的高压的超高压装置
基本信息
- 批准号:14209014
- 负责人:
- 金额:$ 32.61万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:2002
- 资助国家:日本
- 起止时间:2002 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
An ultrahigh-pressure apparatus is proposed where pressures are generated by constraining expansion due to breaking of bonds in matter. Glassy carbon constrained by a sapphire anvil cell was irradiated through one anvil with a pulsed YAG laser. A measurement of fluorescence emission from a ruby in the sample chamber was made. A measurement of reflectivity of a diamond was also made in the experiment using the sapphire and diamond anvils for volume constraint. A pulsed X-ray diffraction device was developed to measure transiently generated pressures, which was assembled into the apparatus. The results are as follows: 1. Pressures beyond 300 GPa were achieved for 〜1 ms in the sapphire cell. 2. The fluorescence emission over a wide wavelength range observed in the diamond cell arises from the pressure-induced ^4T_2→^4A_2 transition in ruby, which seems not to result from the pressure-induced diamond fluorescence. 3. High reflectivity suggesting the metallization of diamond was observed at the interface between the diamond crystal and anvil. 4. The observed dislocation density for the diamond is comparable to those for highly deformed crystals, suggesting large plastic deformation of the diamond. 5. As is theoretically predicted by Nielsen, the diamond may have metallized at a uniaxial stress near 400 GPa. 6. The output of pulsed laser required to generate high pressures in the apparatus is some orders of magnitude less than those in the conventional methods. 7. Diffraction data can be obtained from a very small amount of metal powder using the pulsed X-ray diffraction device. 8. The volume of the unit cell for the metal can be determined from the diffraction data. Although several technical problems to be settled for detecting diffracted X-ray from a sample still remain, researches on high-pressure phase of matter in the terapascal region will be started in the near future.
提出了一种超高压装置,其中通过约束由于物质中的键断裂而引起的膨胀来产生压力。玻璃碳约束的蓝宝石砧座细胞照射通过一个砧与脉冲YAG激光。对样品室中红宝石的荧光发射进行了测量。在实验中还测量了金刚石的反射率,使用蓝宝石和金刚石砧进行体积约束。开发了一种脉冲X射线衍射装置来测量瞬时产生的压力,并将其组装到设备中。研究结果如下:1.在蓝宝石单元中,超过300 GPa的压力达到100 ms。2.在金刚石池中观察到的宽波长范围的荧光发射来自于红宝石中的压力诱导^4T_2→^4A_2跃迁,而这似乎不是压力诱导金刚石荧光的结果。3.在金刚石晶体与砧座的界面处观察到高反射率,表明金刚石金属化。4.观察到的金刚石位错密度与高度变形的晶体相当,表明金刚石的塑性变形很大。5.正如Nielsen在理论上预测的那样,金刚石可能在接近400 GPa的单轴应力下金属化。6.在装置中产生高压所需的脉冲激光的输出比常规方法中的输出小几个数量级。7.使用脉冲X射线衍射装置可以从非常少量的金属粉末获得衍射数据。8.可以从衍射数据确定金属的晶胞体积。虽然从样品中检测衍射X射线还有几个技术问题需要解决,但在不久的将来,对四帕斯卡区域物质高压相的研究将开始。
项目成果
期刊论文数量(7)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Evidence for nonplanar atomic arrangement in graphite obtained by Raman spectroscopy
- DOI:10.1103/physrevb.66.104109
- 发表时间:2002-09
- 期刊:
- 影响因子:3.7
- 作者:Y. Kawashima;G. Katagiri
- 通讯作者:Y. Kawashima;G. Katagiri
川島 康: "パルスXによる高圧測定"第45回高圧討論会. (発表予定).
Yasushi Kawashima:“使用脉冲 X 进行高压测量”第 45 届高压研讨会(已安排演示)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
川島 康: "原子間結合の分解による膨張を拘束する超高圧発生:ダイヤモンドの光学転移と塑性変形の観察"第43回高圧討論会講演要旨集. 255-255 (2002)
Yasushi Kawashima:“由于原子间键的分解而抑制膨胀的超高压产生:金刚石的光学转变和塑性变形的观察”第43届高压研讨会摘要255-255(2002年)。
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- 影响因子:0
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KAWASHIMA Yasushi其他文献
KAWASHIMA Yasushi的其他文献
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{{ truncateString('KAWASHIMA Yasushi', 18)}}的其他基金
An ultrahigh-pressure apparatus based on high presure produced by constraining thermal expansion and its application
一种基于约束热膨胀产生高压的超高压装置及其应用
- 批准号:
11490032 - 财政年份:1999
- 资助金额:
$ 32.61万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
A Study on Change in Structure of Graphite under High Pressure by Raman Scattering
拉曼散射研究高压下石墨结构变化
- 批准号:
08459023 - 财政年份:1996
- 资助金额:
$ 32.61万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of ultrahigh pressure apparatus based on high pressure produced by constraining thermal expansion
基于约束热膨胀产生高压的超高压装置的研制
- 批准号:
06559013 - 财政年份:1994
- 资助金额:
$ 32.61万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
High pressure apparatus for growth of diamond based on thermal pressure produced by constraining thermal expansion
基于约束热膨胀产生的热压力生长金刚石的高压装置
- 批准号:
05650125 - 财政年份:1993
- 资助金额:
$ 32.61万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
High-Pressure Apparatus Using Pressure Generated by Restraining Thermal Expansion
利用抑制热膨胀产生的压力的高压装置
- 批准号:
01550104 - 财政年份:1989
- 资助金额:
$ 32.61万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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