Method for assembling sample and thermal insulation salt sheet in hole of sample in diamond anvil cell experiment

Abstract

Disclosed is a method for method for assembling a sample and a thermal insulation salt sheet in a hole of the sample in diamond anvil cell experiment. The method is characterized by including the steps of (1), grinding salt into salt powder; (2), arranging a metal gasket (2) with a through hole on a lower diamond anvil (11) and then positioning and fixing the same; (3), filling the through hole with the salt powder; (4), arranging a high-polymer material sheet (3) on the upper surface of the through hole; (5), making an upper diamond anvil (12) contact with the high-polymer material sheet (3) and then pressurizing to 1-5 GPa; (6), forming a lower thermal insulation salt sheet (71) after removing the upper diamond anvil (12) and the high-polymer material sheet (3); (7), placing the sample (8) on the lower thermal insulation salt sheet (71); (8), placing salt powder on the sample (8); (9) making the upper diamond anvil (12) contact with the salt powder at the opening of the through hole and then pressurizing to 1-5 GPa; (10), removing the upper diamond anvil (12), thereby completing assembling of the upper thermal insulation salt sheet (72).

Description

technical field [0001] The invention relates to the field of high-temperature and high-pressure physical experiments, in particular to a method for assembling a heat-insulating salt sheet in a sample hole of a diamond anvil test and a sample. Background technique [0002] The diamond anvil is an important device for studying the properties of matter in extreme high-temperature and high-pressure environments in the fields of earth science, condensed matter physics, chemistry and materials science. The way to realize the high temperature and high pressure of diamond on the anvil includes: using a pair of diamonds with a diameter of micron to generate ultra-high pressure through mechanical extrusion, and the realization of high temperature is to use the focused laser to directly heat the sample. The assembly process of high-temperature and high-pressure experimental samples usually includes the following steps: 1. Place a metal gasket with a pre-processed sample hole (usually t...

AI Technical Summary

Problems solved by technology

This process includes the following technical difficulties: First, cutting the salt flakes with a diameter of millimeters into a size suitable for the sample hole requires superb experimental technology and patience; second, the cutting surface of the salt flakes will absorb moisture after being in the air for a long time. When the sample needle is used to put the salt piece into the sample hole, the salt piece adheres to the sample needle and the salt piece fails to be placed

[0004] Under normal circumstances, it takes about 30-60 minutes for a skilled experimenter to complete step 2, while it may take 1-2 hours for ordinary experimenters

Images