权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Crystal chemistry study of minerals by high pressure and high temperature in-situ Raman spectroscopy

高压高温原位拉曼光谱研究矿物晶体化学

基本信息

批准号：
15340146
负责人：
FUNAMORI Nobumasa
金额：
$ 9.09万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340146/
关键词：
techniques for high pressure and temperature experiments high pressure and temperature in-situ Raman spectroscopy laser heating with relaxation oscillation pulses gasket made of c-BN powder 超高圧高温実験ダイヤモンドアンビル装置立法晶窒化ホウ素ガスケット地球惑星内部物質レーザー加

项目摘要

The purpose of this study is to develop new techniques for high pressure and temperature in-situ Raman spectroscopy. We have constructed the system that works up to above 100 GPa. By combining it with other techniques such as synchrotron X-ray diffraction, pressure-induced transitions of materials can be studied from a multilateral standpoint. We have explored the dense structure of dioxides and have found that the PbC12 structure, the most dense structure reported so far, further transforms to a new and more dense phase under ultra-high pressure. However, the technical development for in-situ Raman spectroscopy at high temperatures (and simultaneously high pressures) is not satisfactory. Measurements at temperatures up to 800 K can be made with an external heating method. In order to make Measurements at higher temperatures, (1) stabilized generation of high pressure and temperature, and (2) measurements with a gated detector may be necessary. For (1), we have developed a new laser heating method with relaxation oscillation pulses and a new gasket made of c-BN powder. The new heating technique made it possible to generate high temperatures with a lower input energy to the sample than the conventional technique. This prevents the damages on the high-pressure cell and allows more precisely controlled heating. The new gasket made it possible to preserve the sample volume twice as much as the usual sample volume (, and hence to measure stronger signals from the sample). Pressure generation can be stabilized, if we reduce the sample volume with the new gasket. For (2), the CCD camera with an image intensifier would help to achieve the purpose of this study. However, we had to give up the camera because of budgetary restrictions. We would like to achieve the original purpose by getting a new budget.

本研究的目的是开发高压和高温原位拉曼光谱的新技术。我们已经构建了一个系统，可以达到100 GPa以上。通过将其与同步加速器x射线衍射等其他技术相结合，可以从多边角度研究材料的压力诱导跃迁。我们对二氧化氧化物的致密结构进行了探索，发现目前报道的密度最大的PbC12结构在超高压下会进一步转变成一个新的更致密的相。然而，高温（同时高压）原位拉曼光谱技术的发展并不令人满意。温度高达800k的测量可以用外部加热方法进行。为了在更高的温度下进行测量，(1)稳定产生高压和高温，(2)可能需要使用门控检测器进行测量。对于(1)，我们开发了一种新的松弛振荡脉冲激光加热方法和一种新的c-BN粉末衬垫。与传统的加热技术相比，新的加热技术可以用更低的输入能量来产生高温。这防止了高压电池的损坏，并允许更精确地控制加热。新的衬垫可以保持样品体积是通常样品体积的两倍（因此可以测量来自样品的更强信号）。如果我们用新垫圈减少样品体积，产生的压力就可以稳定下来。对于(2)，带图像增强器的CCD相机将有助于实现本研究的目的。然而，由于预算限制，我们不得不放弃相机。我们希望通过获得新的预算来达到原来的目的。

项目成果

期刊论文数量（11）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Heating in a diamond-anvil cell using relaxation oscillations of a Q-switched Nd : YAG laser

使用 Q 开关 Nd : YAG 激光器的弛豫振荡在金刚石砧池中加热

DOI：
发表时间：
2006
期刊：
Review of Scientific Instruments 77
影响因子：
0
作者：
Matsuzaki;SS;Takamura;N;Washitani;I;N. Funamori;T. Sato;T. Sato;N.Funamori;船守展正;N.Funamori
通讯作者：
N.Funamori

In-situ X^ray experiment on the structure of hydrous Mg-silicate melt under high pressure and high temperature

高压高温下水合硅酸镁熔体结构的原位X射线实验