Ceramic electric heating assembly and method for manufacturing same

Abstract

The invention provides a ceramic electric heating assembly which comprises a ceramic matrix, heating film resistors, at least two groups of electrodes, screw holes and a protective layer. The heating film resistors are arranged on the ceramic matrix; the electrodes are arranged on the ceramic matrix and are electrically connected with the heating film resistors; the screw holes are formed in the ceramic matrix and are electrically connected with the electrodes; the protective layer covers the outer surfaces of the heating film resistors. The ceramic electric heating assembly has the advantages that the structures of the screw holes are formed in the electric heating assembly, accordingly, braze welding can be omitted during lead wire connection, and the ceramic electric heating assembly is simple in manufacture and low in cost.

Description

technical field [0001] The invention relates to the field of heating devices, in particular to a ceramic electric heating component and a preparation method thereof. Background technique [0002] MCH (Metal Ceramics Heater) metallized ceramic heating element is a new type of heating element with high thermal efficiency, stable performance, long life, safety and environmental protection. Since the launch of MCH metallized ceramic heating element, the product has been widely favored by the market. Its structure includes: a ceramic base, two electrodes arranged on the ceramic base and a heating resistor printed on the ceramic base. The preparation method is as follows: printing metal tungsten or molybdenum-manganese slurry on the ceramic cast body, after hot pressing lamination, and then under the protection of hydrogen atmosphere at 1600 ℃, ceramics and metals are co-sintered to form a ceramic heating element. [0003] The Chinese invention patent application with application...

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Problems solved by technology

[0004] However, the electric heating components prepared by the HTCC high-temperature co-fired ceramic process have obvious technical defects: first, the lead wires need to be fixed on the ceramic components by brazing, and more than two sets of green ceramic lamination processes are used. After many times of high-temperature sintering under special atmosphere conditions above 1600°C, the process is complicated and the manufacturing cost is high; secondly, the heat dissipation performance is poor; thirdly, the electric heating component prepared by this invention uses high-temperature tungsten, molybdenum, manganese copper and other metal materials for the conductive heating layer. Generally, the temperature coefficient of resistance (T.C.R) of the material is high, reaching 1000-2500ppm / ℃. The discreteness of the heating resistance is high, and the temperature drift of the resistance is inconsistent, which leads to obvious dissipation of the heating element during operation, which increases the difficulty of circuit design.

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