A high-pressure heat treatment device for ceramic sheets

Abstract

The invention discloses a ceramic wafer high pressure heat treatment device, comprising an induction heater provided with an induction heating power supply, an induction coil, refrigeration water and a regulating valve and used for heating a die, a pressing die fixed on a universal tester by upper and lower die holders, a temperature sensor connected with the pressing die, an optical strain gauge connected with the side wall of a strip, a temperature PID controller connected with the temperature sensor and a control valve on the induction heater and used for receiving a temperature signal sent by the temperature sensor and adjusting induction heater parameters according to the received temperature signal, and a pressure PID controller connected with a strain sensor and a displacement control panel on the universal tester. According to the ceramic wafer high pressure heat treatment device, the induction heater parameters and pressure are adjusted according to the thicknesses, holding temperatures and needed temperature and time for pressure maintaining and holding time of different materials, and pressing heat treatment with single high pressure in the thickness direction is realized.

Description

technical field [0001] The invention belongs to the technical field of ceramic heat treatment, in particular to a high-pressure heat treatment device for ceramic sheets. Background technique [0002] Heat treatment is very important to improve the microstructure and properties of most metal and non-metal materials. For ceramic sheets, due to their high hardness, heat treatment under high pressure is usually used to refine the microstructure and improve the ferroelectric properties. In order to shorten the cooling time and quality of high-pressure heat treatment of cemented carbide, ceramics and other materials, a high-pressure heat treatment furnace is proposed in the invention patent (patent number: 200480030470.7) of Ishikawajima Harima Heavy Industries Co., Ltd., Japan. A pressure vessel is installed inside the heating furnace , heater, insulation wall, insulation cover and cooling fins, so as to realize heating and rapid cooling under internal high pressure conditions. ...

AI Technical Summary

Problems solved by technology

However, this method of using the atmosphere in the heating furnace to achieve high pressure produces limited pressure, and does not have unidirectionality, and the heating speed is slow, the structure is relatively complicated, the energy consumption is high, and the cost is expensive.

At present, some researchers use six-sided top press to carry out higher pressure heat treatment process of high-hard alloy or ceramics, but the main function of this equipment is to prepare super-hard materials, the pressure does not have a single direction, and the pressure and temperature stability The control accuracy is limited, the material size is strict, and the machine cost is relatively expensive, which is not suitable for the promotion and application of heat treatment process.

Images