Sintering control method of ceramic manufacturing

Abstract

The present invention provides a sintering control method of ceramic manufacturing. The method includes the following steps: S1: preparing a pore-forming agent containing a porogen; S2: mixing the pore-forming agent with a ceramic slurry and forming a greenpart; S3: sintering the greenpart at a first temperature in an oxygen-free environment to form a semi-finished object; and S4: sintering the semi-finished object at a second temperature in an oxygen-containing environment to form a ceramic article. Wherein, the first temperature is higher than the second temperature. While the porogen is a carbon-based material, the second temperature is from 300 DEG C. to 600 DEG C., and the porosity of the ceramic article may reach 30% to 70%. By this method, the property of the ceramic article (including mechanical strength, porosity, pore shape and size) can be designed according to requirement and controlled for quality assurance.

Description

technical field [0001] The invention provides a sintering control method for ceramic materials, especially a method for controlling the porosity and pore size of ceramic materials by multi-stage sintering. Background technique [0002] Ceramic engineering is the science and technology of making objects using inorganic non-metallic materials. In recent years, ceramic materials have been widely used in materials engineering, electronic engineering, chemical engineering and mechanical engineering. Because ceramics are generally very heat-resistant, they can be used in many applications that metals and polymers cannot, such as mining, aerospace, biomedical, refining, food and chemical plants, electronics, industrial power transmission, and optical waveguide transmission. [0003] According to different industries, the specifications and characteristics of ceramics have different requirements. In the field of biomedicine, to develop replacement implants for human bone, the poro...

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Problems solved by technology

[0004] However, during the sintering process of ceramics, due to the change of molecular arrangement affected by temperature, porosity will become a factor that is difficult to control accurately, which affects the uncertainty of the quality of sintered products

To accurately adjust the porosity, the industry generally uses low-temperature processes, sacrificing the mechanical strength of ceramic materials

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