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Ceramic heating slice

A ceramic heating element and ceramic technology, applied in the direction of electric heating devices, ohmic resistance heating, heating element materials, etc., can solve the problems of alumina ceramic heating elements that do not meet the requirements, reduce the risk of disconnection of heating lines, and reduce material costs , the effect of improving the service life

Active Publication Date: 2015-06-10
张耿荻
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ceramic heating sheets in the prior art The common alumina ceramic heating sheet uses a heating line printed with a tungsten-containing paste between mm-level two-layer alumina ceramic clips, and the two are co-fired at a high temperature of at least 1500°C. As the requirements of the times change, the requirements for the heating rate and appearance of the ceramic heating element are becoming more and more stringent, especially in the rapid detection of food and medical treatment. The visualization requirements for heating circuit faults in equipment are becoming more and more clear, and the original alumina ceramic heating elements are increasingly not meeting the requirements

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] figure 1 A schematic cross-sectional structure diagram of the ceramic heating sheet of the present invention is given, figure 2 It is a schematic structural diagram of the ceramic heating sheet for rapid food detection of the present invention, image 3 It is a schematic structural diagram of the medical ceramic heating sheet of the present invention, combined with Figure 1~3 It can be seen that the ceramic heating sheet of the present invention includes a ceramic substrate (10, 110, 210) in the lower layer, which is an alumina ceramic material, preferably an alumina ceramic with an Al2O3 content of 92 or more, and is prepared by tape casting; the printed circuit of the middle layer (20, 120, 220 ), the printed circuit adopts a paste containing metal tungsten, and is mixed with Al2O3 according to the resistance requirement. Usually, the printed cir...

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Abstract

The invention relates to a ceramic heating slice. The ceramic heating slice comprises a ceramic substrate and a printing circuit which are burned together under high temperature; the ceramic is used as a supporting structure and has excellent insulation and heat-conducting performance; a heating circuit is used as a heating function element and placed between at least two layers o ceramic substrates; each of the ceramic substrates comprises a 0.4-1.2 mm thick aluminum oxide ceramics substrate and a 3-100 miu m transparent protecting film covering on the printing circuit. The invention further provides a corresponding preparation technique. Through the 3-100 miu m transparent protecting film, heating lines are clear and visible; for reducing the thickness of an upper ceramic, the temperature raising speed is obviously improved and can meet the rapid temperature raising requirement at about 300 DEG C in rapid food detection and medical treatment. Meanwhile, for the upper mm grade aluminum oxide ceramics of the prior art is improved, the material cost is lower. Furthermore, for there is no relative thick aluminum oxide ceramics at the upper layer, the risk of heating circuit disconnection caused by heat loss and rupture of the upper aluminum oxide ceramics in the prior art is reduced, and the service life of the ceramic heating slice is improved.

Description

technical field [0001] The invention relates to a ceramic heating sheet, in particular to a ceramic heating sheet with a clearly visible heating circuit with a fast heating rate. Background technique [0002] Ceramic heating element is a heating element with good corrosion resistance, insulation and thermal conductivity obtained through high-temperature co-firing technology of ceramics and metals. It does not contain lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs) And other harmful substances, in line with EU RoHS environmental protection directives and other environmental protection requirements, widely used in various heating equipment. Ceramic heating sheets in the prior art The common alumina ceramic heating sheet uses a heating line printed with a tungsten-containing paste between mm-level two-layer alumina ceramic clips, and the two are co-fired at a high temperature of at least 1500°C. As the req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/28H05B3/10
Inventor 孙庄黄泽光苏方宁
Owner 张耿荻
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