二级6-8型静高压装置厘米级腔体内置石墨加热组装的设计与实验研究

Design and Experimental Research of the Graphite Heating Assembly of Centimeter-Size Chamber for Two-Stage 6-8 Type Multi-Anvil High Pressure Apparatus

基于国产铰链式六面顶压机二级6-8型静高压装置,采用去尖3节式36/20结构,设计了一种"桥式"结构的石墨加热组装,通过高压原位温度测量获取加热功率与温度的对应关系,得到了稳定的p-T(2.5~10.4GPa,0~1 650/1 800℃)区域。同时样品腔体直径可以达到13mm,实现了厘米级大样品的高温高压制备。讨论了组装的电阻与温度之间的关系,并分析了电阻变化的原因。通过对样品烧结情况的表征,来反映腔体的温度分布情况。研究工作对基于国产铰链式六面顶压机的二级6-8型静高压装置的加热设计有一定的参考意义,并具有良好的实用性。

We designed a built-in graphite heating assembly,called ＂Bridge＂,based on a domestic 6-8type static high pressure apparatus and using the cut-apex three-segment 36/20 assembly,and obtained the relationship between the heating power and the temperature using the high pressure in-situ measurement technology.We also achieved a stable p-T（2.5-10.4GPa;0-1 650/1 800℃）region.Moreover,we successfully synthesized a centimeter sample under high pressure and at high temperature,one that can reach 13 mm.We discussed the relation between the resistances of the assembly and the heating temperature,and analyzed the cause of the resistance change.The temperature distribution of the assemble was reflected by the characterization of the sample.This study will broaden the applicability of the domestic hinge-type cubic-anvil press 6-8type static high pressure apparatus,and offer a better practicability.