Device and method for preparing ceramic through hydrothermal process

Abstract

The invention discloses a device and a method for preparing ceramic by a hydrothermal process. In the device for preparing ceramic by the hydrothermal process, an inner shell is located in an outer shell, a cavity is formed by the inner shell and the outer shell, the cavity is covered with a kettle cover, an objective table is positioned in the inner shell, a ceramic green body is placed on the objective table, the kettle cover has an inlet and an outlet, a conduit is communicated with the inlet and a pressure pump, a gas flow regulating valve is fixedly connected with the guide pipe, a safetypressure release valve is fixedly connected with the kettle cover and is communicated with the outlet, a temperature sensor and a pressure sensor are both fixed in the inner shell, a heating assemblysurrounds the periphery of the inner shell and is arranged in the cavity, and the pressure pump, the gas flow regulating valve, the safety pressure release valve, the temperature sensor, the pressuresensor and the heating assembly are all electrically connected with a controller. By using hydrothermal sintering, hydrothermal densification of the ceramic body is achieved by controlling the pressure and the heat preservation time of the ceramic green body at the temperature lower than 400 DEG C, the ceramic body with the relative density larger than 90% is obtained, and the device and the method have the advantages of being accurate, controllable, low in energy consumption and capable of achieving large-scale production.

Description

technical field [0001] The invention relates to the technical field of low-temperature sintering of ceramics, in particular to a device and method for preparing ceramics by a hydrothermal method. Background technique [0002] The development of new materials progresses with the progress of science and technology. At present, the focus of the material field is on the rapid development of new materials with new characteristics, high cost performance and environmental friendliness throughout the life cycle. Furthermore, ceramics and their high-performance components are widely used in automobiles, electronic information, energy and the environment, Mechanical engineering, medical technology, etc., but these materials can meet the specific requirements of different applications due to their special properties, especially under the demand of high functionality and high reliability. These ceramic materials are generally oxides, sulfates, carbonates, phosphates, silicates, non-oxi...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a hydrothermal preparation ceramic device and method, aiming to solve the problem of ceramic sintering and densification at a lower temperature

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