Large-volume multianvil cells designed for chemical synthesis at high pressures
Large-volume multianvil cells designed for chemical synthesis at high pressures
复制标题
专为高压化学合成而设计的大容量多砧室
DOI：
10.1080/08957950903422444
复制
发表时间：
2010
影响因子：
2
通讯作者：
K. Leinenweber
中科院分区：
文献类型：
--
作者：
E. Stoyanov;U. Häussermann;K. Leinenweber
两个多砧单元组件与八面体边长（OEL）的18和25毫米，已开发，这使得样品体积分别高达153和387立方毫米。在室温和1200 °C下使用淬灭样品进行压力校准，并且在可变温度下使用原位同步加速器测量进行压力校准。这些校准采用25.4 mm碳化钨砧，对于18 mm OEL池（18/12配置）具有12 mm的截断边缘长度，对于25 mm OEL池（25/15配置）具有15 mm的截断边缘长度，并且在接近800 t的载荷下分别产生高达10和7.5 GPa的样品压力。在1200 °C下测得的热梯度在5-10 °C/mm（18/12）和15-20 °C/mm（25/15）之间变化。通过将大的样品/反应体积与最小的热梯度相结合，新的多砧室组件特别适用于高压、高温条件下的化学合成。
Two multianvil cell assemblies with octahedral edge lengths (OEL) of 18 and 25 mm have been developed, which allow sample volumes of up to 153 and 387 mm3, respectively. Pressure calibrations were performed at room temperature and 1200 °C using quenched samples, and at variable temperature using in situ synchrotron measurements. These calibrations employed 25.4 mm tungsten carbide anvils with a truncation edge length of 12 mm for the 18 mm OEL cell (18/12 configuration) and 15 mm for the 25 mm OEL cell (25/15 configuration) and yielded sample pressures of up to 10 and 7.5 GPa, respectively, at loads approaching 800 t. The measured thermal gradients at 1200 °C vary between 5–10 °C/mm (18/12) and 15–20 °C/mm (25/15). By combining large sample/reaction volumes with minimal thermal gradients, the new multianvil cell assemblies are especially useful for chemical synthesis at high-pressure, high-temperature conditions.