Integrated-fin gasket for palm cubic-anvil high pressure apparatus
Integrated-fin gasket for palm cubic-anvil high pressure apparatus
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DOI：
10.1063/1.4896473
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发表时间：
2014-09-01
影响因子：
1.6
通讯作者：
Uwatoko, Y.
中科院分区：
文献类型：
--
作者：
Cheng, J. -G.;Matsubayashi, K.;Uwatoko, Y.
我们描述了一种集成鳍片垫片技术，用于专门用于高压和低温测量的手掌立方砧装置。利用半烧结MgO陶瓷和2.5 mm平方顶部的碳化钨砧制成的衬垫，我们成功地在室温和低温（0.5 K）下产生了超过16 GPa的压力。我们观察到这种特殊结构的压力自增，并通过监测高达12 GPa的铬的反铁磁转变温度进一步表征了热诱导的压力变化。这种改进的衬垫除了增大了压力容量外，还大大提高了将样品悬挂在充满液体传压介质的特氟龙胶囊内的电引线的存活率。这些改进应归功于在初始压缩期间减少了垫片材料的挤压。(C) 2014 AIP出版有限责任公司
We described an integrated-fin gasket technique for the palm cubic-anvil apparatus specialized for the high-pressure and low-temperature measurements. By using such a gasket made from the semi-sintered MgO ceramics and the tungsten-carbide anvils of 2.5 mm square top, we successfully generate pressures over 16 GPa at both room and cryogenic temperatures down to 0.5 K. We observed a pressure self-increment for this specific configuration and further characterized the thermally induced pressure variation by monitoring the antiferromagnetic transition temperature of chromium up to 12 GPa. In addition to enlarge the pressure capacity, such a modified gasket also improves greatly the surviving rate of electrical leads hanging the sample inside a Teflon capsule filled with the liquid pressure-transmitting medium. These improvements should be attributed to the reduced extrusion of gasket materials during the initial compression. (C) 2014 AIP Publishing LLC.