Novel infrared conductive ceramics and preparation method thereof
A conductive ceramic, infrared technology, applied in ceramic molding machines, ceramic layer products, chemical instruments and methods, etc., can solve the problem of low insulation strength of insulating layers, difficult to bond tightly, material flexural strength, resistivity uniformity restrictions, etc. problems, to achieve the effect of reducing porosity, reducing oxidation, improving uniformity and high temperature aging resistance
Inactive Publication Date: 2010-12-15
SHANDONG UNIV OF TECH
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Problems solved by technology
This molding method leads to low dielectric strength of the insulating layer, and it is difficult to tightly bond between the glaze layer and the conductive layer, as well as the conductive layer and the ceramic substrate, and the flexural strength and resistivity uniformity of the material are also greatly limited.
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[0014] exist figure 1 In the shown embodiment: the new infrared conductive ceramic adopts an upper, middle and lower layered composite structure, wherein the upper and lower layers are insulating layers 1 and the middle is a conductive layer 2 . The two insulating layers 1 and the conductive layer 2 are three-layered fabrics, which are pressed into a ceramic body by a ceramic press, and then sintered at a high temperature to become a conductive ceramic body; the material of the insulating layer 1 is a non-conductive ceramic raw material, and the conductive layer 2 The material of the insulating layer is doped with conductive materials based on the raw material of the insulating layer. The added conductive material can be one of carbon, conductive ceramic powder, metal material or a mixture of the above-mentioned conductive materials.
[0015] Preparation method 1: The insulating material and the conductive material are prepared through the processes of batching, ball milling,...
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The invention provides a novel infrared conductive ceramics with a composite structure of upper, middle and lower layers wherein the lower and the upper layers are insulating layers and the middle layer is the conductive layer, which is characterized in that forming raw materials of the conductive layer and the insulation layer are different, wherein the insulation layer material is non-conductive ceramic materials and the conductive layer material is a base material of insulation layer materials doping with conductive material and the additive conductive material can be one or a mixture of carbon type, conductive ceramic powder, metal materials; the three layers are pressed, molded and sintered into one body. The preparation process includes the working procedure in turn of producing, drying and high-temperature firing of ceramics green body, which is characterized in that the three layers of two insulation layers and the conductive layer are distributed respectively and are pressedby ceramics press machine to a ceramic green body. The infrared conductive ceramic material of the invention is provided with a dense surface, a high insulating strength and a high bending strength, thereby effectively solving the problems that the conductive ceramics has an uneven resistivity and is easy to absorb moisture and rapid in aging at high temperature, and so on.
Description
technical field [0001] The invention provides a novel infrared conductive ceramic and a preparation method thereof, belonging to the technical field of functional ceramics and electrothermal materials. Background technique [0002] Infrared electric heating ceramics is a new type of electric heating material, and has the functions of infrared health care, decoration and so on. There are already patented technologies related to the preparation of conductive ceramics, such as the introduction in the invention patent (ZL00107278.1) "Graphite Conductive Ceramics": Graphite conductive ceramics are clay, graphite and an appropriate amount of water mixed into a uniform mud material, which is pressed and composited, dried , It is made by high-temperature firing in a kiln; the patent (ZL03124488.2) "Composite Conductive Ceramics and Its Preparation Technology" introduces: the preparation method of composite conductive ceramics is: mixing ingredients, molding, and sintering. The comm...
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IPC IPC(8): C04B35/00B32B18/00B32B7/02H05B3/14H01B1/14B28B3/00
Inventor 刘俊成郑昕白佳海
Owner SHANDONG UNIV OF TECH