Dynamic loading device based on symmetrical diamond anvil cell technology

Abstract

The invention discloses a dynamic loading device based on a symmetrical diamond anvil cell technology. The dynamic loading device comprises a carrier, a symmetrical DAC (diamond anvil cell), a plurality of piezoelectric ceramics and static pressure loading screws, wherein the carrier comprises an upper cover and a sleeve; the upper cover is in a circular plate shape; the sleeve is cylindrical; a groove is formed in the center of the top of the sleeve and used for loading the symmetrical DAC; a piston part of the symmetrical DAC and the sleeve of the carrier are fixed by screws; a plurality of perforated piezoelectric ceramic filling holes and a plurality of static pressure loading threaded mounting holes are centrally symmetrically distributed at the bottom of the sleeve of the carrier in a loading axis direction; light holes are formed in the centers of the upper cover and the sleeve of the carrier; the piezoelectric ceramics are columnar and parallel to an axis of the sleeve; the piezoelectric ceramics are fixedly arranged in the filling holes at the periphery of the sleeve; the lower ends of the piezoelectric ceramics are fixed in the filling holes at the periphery of the is fixed via fixing screws; and the upper ends of the piezoelectric ceramics are contacted with the bottom surface of the upper cover. The device is an experimental device capable of using the symmetrical DAC and testing quick loading / unloading; an operation process of an experiment is simplified; a use rate of the device is increased; and the experiment difficulty is reduced.

Description

technical field [0001] The invention relates to a high voltage device. Background technique [0002] The science of high pressure experiments can traditionally be divided into two fields, static high pressure experiments and dynamic loading experiments. Hydrostatic high pressure experiments are mainly used to study the changes of substances under quasi-hydrostatic pressure conditions. Dynamic or impact experiments mainly study the change of physical properties of materials under different strain rates. Appropriate strain rate can make the material deviate from the conventional chemical equilibrium state and form some metastable phases, which are of great significance for the study of the growth process and dynamics of earth minerals. Therefore, in order to better study and understand the effect of strain rate on material properties, a tool that can effectively implement dynamic loading is urgently needed. [0003] DAC (diamond anvil cell, diamond anvil) is an experimental...

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Problems solved by technology

[0004] Although the dDAC of Lawrence Livermore National Laboratory can achieve a relatively high loading rate, it requires a specialized design and a large volume, which makes it difficult to prepare and fill the device with samples, and cannot use the commonly used symmetrical DAC. The device can only prepare one sample at a time, and the sample cannot be quickly replaced according to the demand during the experiment, which greatly reduces the utilization rate of the device and increases the difficulty of the experiment, resulting in difficulty in device deployment, poor experimental operability, and low device utilization. technical problem

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