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Ceramic room-temperature sintering method

A sintering method and ceramic technology, which is applied in the field of ceramic sintering at room temperature, can solve the problems of difficulty in preparing nano-ceramic materials, excessive ceramic grains, etc., and achieve the effect of reducing the average grain size and increasing the relative density

Active Publication Date: 2021-08-27
佛山华骏特瓷科技有限公司 +1
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  • Application Information

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Problems solved by technology

[0003] However, none of the above methods can avoid the long holding time, which leads to excessively large ceramic grains, making it very difficult to prepare nano-ceramic materials.

Method used

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Embodiment Construction

[0025] The concept, specific structure and technical effects of the present disclosure will be clearly and completely described below in conjunction with the embodiments and drawings, so as to fully understand the purpose, scheme and effect of the present disclosure. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0026] like figure 1 Shown is a flow chart of a ceramic room temperature sintering method according to the present disclosure, combined below figure 1 A room temperature sintering method for ceramics according to an embodiment of the present disclosure will be described.

[0027] The present disclosure proposes a method for sintering ceramics at room temperature, which specifically includes the following steps:

[0028] Step 1, mixing raw materials, and pressing the mixed materials into a shaped green body;

[0029] Step 2, heating the molded gree...

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Abstract

The invention discloses a ceramic room-temperature sintering method which is characterized in that local dielectric breakdown of ceramic room-temperature flash sintering is controlled by calculating an air pressure variable. The method comprises steps: mixing raw materials, and pressing a mixed material into a molded green body; heating the molded green body to remove an adhesive in the molded green body, drying and continuously heating to obtain a ceramic green body; coating two ends of the ceramic green body with silver paste to reduce contact resistance with a circuit, and baking and curing the silver paste to obtain a cured ceramic green body; placing the cured ceramic green body in a vacuum chamber, and connecting a copper wire with a high-voltage alternating-current power supply to prepare flash burning; in the flash burning process, placing a corundum plate between the cured ceramic green body and the bottom of a vacuum chamber for insulation, and connecting a high-voltage resistor with a sample and a power supply in series; adjusting the local dielectric breakdown of the ceramic material during room-temperature flash burning by adjusting the burning air pressure value, voltage and current. In addition, the method has the following two advantages: (1) the relative density of the ceramic sample is increased; and (2) the average grain size of the ceramic sample is reduced.

Description

technical field [0001] The disclosure belongs to the field of preparation of ceramic materials, and in particular relates to a method for sintering ceramics at room temperature. Background technique [0002] At present, general ceramic materials are prepared by traditional powder metallurgy methods, which involve pre-processing, sintering and post-sintering treatment of raw powder materials, and are widely used in industrial fields. Ordinary flash sintering In the flash sintering process, a strong electric field and a large current flow through the ceramic sample. Compared with other sintering techniques, the densification time of the ceramic is shorter, and the furnace temperature of the flash sintering is lower. So far, various materials including ionic conductors, semiconductors and insulators have been successfully prepared by flash sintering [0003] However, none of the above methods can avoid the long holding time, which leads to excessively large ceramic grains, mak...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622C04B35/64C04B41/88
CPCC04B35/48C04B35/622C04B35/64C04B41/88C04B41/5116C04B2235/6562C04B2235/6567C04B2235/666C04B2235/6581C04B41/4539C04B41/0072
Inventor 王希林黄荣厦祝志祥吴昂轩贾志东
Owner 佛山华骏特瓷科技有限公司
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