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Method for fabricating electric-heating film PTC heating devices

A technology for heating devices and manufacturing methods, applied in electric heating devices, electrical components, ohmic resistance heating, etc., can solve the problems of unsafe use, rise, easy to be damaged, etc., and achieve safe and reliable use, simple process flow, and bonding strength. high effect

Inactive Publication Date: 2009-04-01
SHENZHEN JINKE SPECIAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these electrothermal film heating devices, due to the defects in the processing technology of the important part of the electrothermal film, the main problem is that the temperature cannot be self-limited. After the power is turned on, the temperature will continue to rise without an external temperature control device. It is not safe to use when it is above 700 degrees, and it cannot work stably and continuously
Especially in an oxidizing atmosphere or a humid environment, short-circuit failure is prone to occur, and there are potential safety hazards
Chinese Patent No. 03114238.9 discloses "A New Type of Manufacturing Method for Heating Elements". This technical solution provides a method for manufacturing an electric heating film heating element. The electric heating film heating element manufactured by this method is due to the The technical scheme of bonding the ceramic plates together with ceramic sintering aids is adopted. Therefore, the bond between the ceramic plates of the produced electrothermal film heating element will be easily destroyed at high temperature, and cannot work for a long time. Short-circuit failure is prone to occur in oxidizing atmosphere or humid environment

Method used

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  • Method for fabricating electric-heating film PTC heating devices
  • Method for fabricating electric-heating film PTC heating devices
  • Method for fabricating electric-heating film PTC heating devices

Examples

Experimental program
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Embodiment 1

[0043] Firstly, the ceramic substrate green body is made by using the green body casting process: adding an appropriate binder to the alumina ceramic powder, and the alumina used as the raw material of the upper ceramic substrate and the lower ceramic substrate is required to have a content of 96% after sintering . A high-viscosity slurry is formed after ball milling and mixing. The thickness of the casting layer is controlled by a scraper located above the conveyor belt, and a certain thickness of slurry is evenly distributed on the carrier belt when the conveyor belt moves. After drying at 100°C, it is ready for use. This process is prior art. The ceramic substrate green body has a flat surface and a thickness of 0.8mm. as attached figure 1 and 2 As shown in , the ceramic substrate green body in this embodiment has a rectangular structure, and three gaps 6 or two gaps are left on the upper ceramic substrate 4, and the positions of the gaps are directly opposite to the l...

Embodiment 2

[0053] Firstly, the ceramic green body tape-casted with aluminum nitride as the raw material is selected as the ceramic substrate, and the content of aluminum nitride used as the raw material of the upper ceramic substrate and the lower ceramic substrate is required to be 94% after sintering. The green body of the ceramic substrate in this embodiment is a circular flat plate structure, and there are two gaps on the upper ceramic substrate 4, and the positions of the gaps are directly opposite to the lead-out ends of the electrodes 2 of the lower ceramic substrate 3, as shown in the attached Figure 5 And attached Image 6 shown in . The surface of the ceramic substrate green body is flat and the thickness is 1.0mm

[0054] In this example, 60% molybdenum-manganese mixed powder is selected as the electric heating film raw material in the electric heating film slurry screen printing, and 40% glass powder is added, and then mixed with the binder at a ratio of 4:1 . The ratio o...

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Abstract

This invention relates to electric heating film PTC device process method, which is characterized by comprising the following steps: adopting streamline shaped ceramic green compact as upper ceramic base board and down ceramic base board by use of materials of alumina and aluminium nitride; electric heating film plasm wire net printing, heat rolling and glue drainage with temperature of 60-120 DEG C and pressure of 50-300kg.cm-2,sintering and connection with temperature of 1500-1700 DEG C ; wherein the said plasm is made of tungsten powder or molybdenum and manganese powder of 90%-99% with glass powder of 1%-10% by their proportion of 10:1-1:1.

Description

Technical field: [0001] The invention relates to a manufacturing method of an electrothermal film PTC heating device, which belongs to a manufacturing method of an electric heating device. Background technique: [0002] At present, there are various types of electrothermal film heating devices made of metal, semiconductor or other composite materials in the prior art. In these electrothermal film heating devices, due to the defects in the processing technology of the important part of the electrothermal film, the main problem is that the temperature cannot be self-limited. After the power is turned on, the temperature will continue to rise without an external temperature control device. When it is above 700 degrees, it is not safe enough to use, and it cannot work stably and continuously. Especially in an oxidizing atmosphere or a humid environment, short-circuit failure is prone to occur, and there are potential safety hazards. Chinese Patent No. 03114238.9 discloses "A N...

Claims

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Application Information

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IPC IPC(8): H05B3/28H05B3/12
Inventor 郜长福陈闻杰
Owner SHENZHEN JINKE SPECIAL MATERIALS CO LTD
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