中文摘要：

最近研制的二级6—8型大腔体静高压装置可在15GPa以上的压力条件下进行厘米级样品的高压合成，对此装置的高压腔内置加热元件进行了设计与实验测试，并标定了不同的腔体压力下加热功率和温度的关系，同时用六角氮化硼在没有触媒的情况下转化成立方氮化硼的合成实验验证了此装置所达到的温压条件。实验结果表明，所设计的加热组装在高压高温下运行稳定，可以在压力超过14GPa、温度超过1800℃的条件下进行厘米级样品的高温高压处理。

英文摘要：

In the present study,we developed a two-stage 6-8 type multianvil high pressure apparatus,which is capable of pressurizing centimeter-scale samples above 15 GPa. We also designed and tested the heater cell for the apparatus. The relationship between the heating power and the cell temperature was calibrated under different pressures. With the successful experiment of directing transformation of hexagonal boron nitride to cubic boron nitride, the pressure and temperature in the heater cell was demonstrated. The experimental results indicate that the assembly can run stably under a pressure above 14 GPa and at a temperature above 1 800 ℃ for a centimeter size sample.