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Development of anvil with sintered diamond core for high pressure high temperature experiments

高压高温实验用烧结金刚石芯砧座的研制

基本信息

批准号：
01840029
负责人：
AKAOGI Masaki
金额：
$ 5.18万
依托单位：
Gakushuin University (1990-1991)Kanazawa University (1989)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01840029/
关键词：
Ultra-high pressure sintered diamond phase transition Bridgman anvil 高温高圧実験アンビル

项目摘要

The purpose of this research project is to develop anvils with sintered diamond cores and to generate high pressures and high temperatures using the new anvils. We have developed two kinds of Bridgman anvils which consist of tungsten carbide with sintered diamond core. The diameters of tlie anvils are 26 and 20 mm. We have also constructed a 600-ton press, which is used to compress the Bridgman anvils to generate high pressures. Using these apparatus, the following results have been obtained during this project term.1. We have successfully generated pressure up to about 20.5 GPa using the new anvils. This generated pressure is much higher than those attained by Bridgman anvils made of tungsten carbide. The new anvils have also been used for high pressure high temperature experiments up to 17 GPa and 1400 ﾟC.2. The following phase transition experiments have been caried out. Phase boundaries in KAlSi_3O_8 feldspar to K_2Si_4O_9 wadeite + Al_2SiO_5 kyanite + SiO_2 coesite (or stishovite) and further to KAlSi_3O_8 hollandite have been determined. Stability field of CaAl_2O_4 calcium ferrite has been examined. The decomposition boundary of CaFeSi_2O_6 clinopyroxene to CaSiO_3 perovskite + Fe_2SiO_4 spinel +SiO_2 stishovite has also been determined. These phase boundaries are of geophysical and geochemical importance in the lower mantle.3. As a related topic, the rutile-alphaPbO_2 transition boundary in TiO_2 has accurately been determined by in situ x-ray diffraction techniques at high pressure and high temperature. This boundary is important for pressure calibration at high temperatures.

该研究项目的目的是开发具有烧结金刚石芯的砧座，并使用新砧座产生高压和高温。我们开发了两种布里奇曼砧，由碳化钨和烧结金刚石芯组成。砧座的直径为 26 和 20 毫米。我们还建造了一台 600 吨压力机，用于压缩布里奇曼砧以产生高压。使用这些设备，在本项目期间获得了以下结果： 1．我们使用新砧成功地产生了高达约 20.5 GPa 的压力。产生的压力远高于由碳化钨制成的布里奇曼砧所达到的压力。新砧座还用于高达 17 GPa 和 1400 °C.2 的高压高温实验。进行了以下相变实验。确定了KAlSi_3O_8长石到K_2Si_4O_9硅锰矿+Al_2SiO_5蓝晶石+SiO_2柯石英(或辉石)以及KAlSi_3O_8镁锰矿的相界。对CaAl_2O_4铁酸钙的稳定性场进行了考察。还确定了CaFeSi_2O_6单斜辉石向CaSiO_3钙钛矿+Fe_2SiO_4尖晶石+SiO_2辉石的分解边界。这些相界对于下地幔具有重要的地球物理和地球化学意义。3．作为相关课题，TiO_2中的金红石-αPbO_2转变边界已通过高压高温下的原位X射线衍射技术准确确定。该边界对于高温下的压力校准很重要。