Polarization Method and Polarization Device of Piezoelectric Ceramics in Sulfur Hexafluoride Gas

Abstract

Polarization method of piezoelectric ceramics in sulfur hexafluoride gas: (1) Put the piezoelectric ceramics with silver electrodes into the polarization fixture; (2) In a seamless barrel with a depth of 0.8-1.2 meters Place a tinfoil hydrogen balloon with a specific gravity similar to that of air; (3) Inject sulfur hexafluoride gas into the seamless barrel so that the tinfoil hydrogen balloon floats to half the height of the barrel; (4) Place the piezoelectric ceramic chip in the Put the polarization fixture into the barrel and under the tinfoil hydrogen balloon, so that the sulfur hexafluoride gas cannot pass through the ceramic; (5) Turn on the polarization power supply and apply the specified voltage polarization. The polarization device includes aluminum plates, insulating ceramic positioning plates, connecting rods, lifting rods, insulating resin plates, conductive probes, protective resistors, etc. The method of the invention can prevent ceramics from being contaminated by oil, and the polarization process is not affected by climate conditions, ensuring that the piezoelectric ceramics obtain fully perfect polarization intensity, and is particularly suitable for polarization of piezoelectric ceramics with high coercive fields.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramics, in particular to a polarization method and a polarization device for piezoelectric ceramics in sulfur hexafluoride gas. Background technique [0002] As a piezoelectric ceramic, only after the polarization process can it show the piezoelectric effect. The so-called polarization is to add a strong DC electric field on the piezoelectric ceramics, so that the electric domains in the piezoelectric ceramics are aligned along the direction of the electric field. Only under the action of a polarized electric field, the electric domains in the piezoelectric ceramics can be aligned along the direction of the electric field. And the higher the polarization electric field is, the greater the role of electric domain alignment is, and the more perfect the polarization is. In order to fully polarize the piezoelectric ceramics, the polarization electric field must be reasonably selected accordi...

AI Technical Summary

Problems solved by technology

Generally, high-temperature polarization in air is suitable for polarizing products with large size and difficult conventional polarization, but the efficiency is very low and the equipment is more complicated.

Images