A compact cubic anvil high pressure apparatus

Abstract

The compact cubic anvil apparatus for generating to 100kb in a pyrophyllite cube was devised and the calibration curve of pressure was determined. The external ram force applied to only one axis is converted to six equal components of force and the six anvils are forced to advance equally to the center of pyrophyllite cube by the functions of the tetragonal bipyramidal guide blocks and the trapezoid end blocks, of the four anvils located horizontally and then throughout the pyrophyllite cube except its outer part is compressed homogeneously with increasing pressure. The calibration curve of pressure was determined by the aid of phase transitions of Bi I-II, Tl II-III, Ba II-III and Bi V-VI. The hydrostatic pressure to 100kb can be generated in a pyrophyllite cube with good efficiency, that is, the load loss by gaskets of pyrophyllite is comparatively small.