Design of a double radius type large volume cubic anvil for achieving longer lifetime and higher cell pressure

摘要

Large volume cubic anvil (LVCA) have been widely used in cubic high pressure apparatus, which can accommodate a large sample volume (the largest volume of compressed cell is 422 cm3), but they are limited by shorter lifetime (<3000 times) and lower cell pressure (<6 GPa). In this paper, we have designed of a double radius type LVCA, which has three advantages. Firstly, the rate of cell pressure transmitting and the pressurized seal stability of the sample cell can be maintained, which is often sacrificed with optimum the geometrical condition of the anvil. Secondly, the lifetime of double radius type LVCA can be increased about 19.86 % than that of traditional anvil. Thirdly, the cell pressure can be increase about 13.45 % after the modification of the anvil. This work makes an effective solution for solve the choke points of LVCA and would be used widely in other types of Multi-anvil apparatuses.