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Ceramic electric heating assembly and method for manufacturing same

An electric heating and ceramic technology, which is applied in the field of ceramic electric heating components and its preparation, can solve problems such as complicated process, inconsistent resistance temperature drift, poor heat dissipation performance, etc., and achieve the effect of improving production efficiency, simplifying the preparation process, and good temperature consistency

Active Publication Date: 2015-07-01
张飞林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Ceramic electric heating assembly and method for manufacturing same
  • Ceramic electric heating assembly and method for manufacturing same
  • Ceramic electric heating assembly and method for manufacturing same

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preparation example Construction

[0080] The invention also discloses a method for preparing a ceramic electric heating component, which includes the following steps:

[0081] (1) obtain the ceramic substrate with screw hole through forming;

[0082] (2) setting electrodes on the ceramic substrate, and the screw holes are electrically connected to the electrodes;

[0083] (3) Obtain the heating film resistor connected to the electrode and arranged on the ceramic substrate by thick film screen printing, film deposition or sputtering;

[0084] (4) A protective layer covering the resistor is formed on the ceramic substrate by thick-film silk screen printing to obtain a ceramic electric heating component.

[0085] According to the present invention, firstly, a ceramic matrix with screw holes is obtained by molding. The ceramic matrix is ​​preferably alumina or aluminum nitride ceramics with a purity not lower than 95%. The ceramic substrate is preferably formed into a specific shape by casting, film pressing or...

Embodiment 1

[0097] A cylindrical 95% alumina ceramic substrate is obtained by molding; two screw holes are arranged on the top surface of the ceramic substrate;

[0098]The electrode paste is printed on the side wall of the ceramic substrate and sintered at 850°C; the formed electrode and the screw hole are sintered to form a side conductive electrode, and the side conductive electrode makes the electrode and the screw hole electrically connected.

[0099] The prepared ruthenium oxide slurry is deposited on the side wall of the ceramic substrate by printing, and sintered in a tunnel furnace under 850°C clean air atmosphere to form a heating film resistor.

[0100] The glass paste is coated on the outer surface of the heating film resistor by printing, and sintered in a tunnel furnace at 600°C to obtain a protective layer.

[0101] Cut the cross-section of the resistor body by laser cutting the formed heating film resistor, and adjust the resistance value by reducing the cross-sectional ar...

Embodiment 2

[0110] A cylindrical 95% alumina ceramic substrate is obtained by molding; two screw holes are arranged on the side of the ceramic substrate;

[0111] The electrode paste is printed on the side wall of the ceramic substrate and sintered in a 900°C tunnel furnace; the electrodes and the screw holes are electrically connected.

[0112] The prepared ruthenium oxide slurry was deposited on the side wall of the ceramic substrate by printing, and sintered in a tunnel furnace at 900°C to form a heating film resistor.

[0113] The glass paste is coated on the outer surface of the heating film resistor by printing and sintered at 600°C to obtain a protective layer.

[0114] Lead wires matching the screw holes are prepared, the two are connected by threads, and insulating sleeves are sheathed on the lead wires.

[0115] A graphene coating is coated on the bottom surface of the ceramic substrate.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/12
Inventor 张飞林蔡德静
Owner 张飞林
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