| 摘要 |
PURPOSE: To suppress the breakage of the piston and anvil, to minimize the frictional force between the piston and piston hole acting on the piston and to detect the deformation data under extra-high pressure with high precision. CONSTITUTION: A conical recess 13 is formed at the tip of an anvil 1 into which a piston 8 is inserted. A conical thin soft sheet 20 and a conical anvil tip member 30 with a conical small recess 32 formed on its upper face are inserted in this order into the recess 13, and a soft substance 40 such as lead is interposed in the small recess 32 of the member 30 and between a hole 31 and the piston 8. The pseudo-hydrostatic pressure of condensed water acts on the piston and anvil to prevent them from being broken, the seduction in the diameter of a piston hole 9 is reduced by the wedge effect of the tip member 30, the frictional force is lowered, and the deformation data are precisely detected.
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