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A ceramic electromagnetic coupler core and preparation method thereof

An electromagnetic coupling and ceramic technology, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., can solve the problems of reduced aluminum powder in the core, limited service life, and reduced product qualification rate, so as to improve the product qualification rate. , excellent insulation performance, and the effect of ensuring the product rate

Inactive Publication Date: 2016-01-20
GUANGDONG SHUNXIANG ENERGY SAVING LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the cores of electromagnetic couplers at home and abroad are cast by manganese-copper alloy and wrapped with insulating polyvinyl chloride film. This kind of core is expensive, and the polyvinyl chloride film is easily deteriorated and damaged by high temperature aging, and its service life is limited.
[0004] In the prior art, an electromagnetic coupler core prepared by doping porcelain powder and aluminum has been disclosed (see Chinese patent CN200810029263.X). However, the defect of this core is that the aluminum powder is very active. During the sintering process, It is easy to oxidize, which reduces the effective amount of aluminum powder in the core, reduces the heat transfer efficiency of the core, and reduces the qualified rate of products

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The core of the ceramic electromagnetic coupler in this embodiment is composed of components calculated by weight percentage as follows: waste porcelain powder 98%; high thermal conductivity graphite 2%.

[0022] (1) Put the waste porcelain powder into the ball mill, and carry out wet ball milling according to the weight ratio of material: ball: water = 1:1.5:1.2, until the residue of 10,000-hole sieve is 0.03%, and the porcelain slurry is obtained;

[0023] (2) Add high thermal conductivity graphite to the above porcelain slurry, and add an appropriate amount of sodium hydroxymethyl cellulose, and mix well;

[0024] (3) Pour the mixed porcelain slurry into a mold for casting, and then sinter the molded body at 950-1000° C. to obtain the ceramic electromagnetic coupler core.

Embodiment 2

[0026] The core of the ceramic electromagnetic coupler in this embodiment is composed of the following components by weight percentage: waste porcelain powder 98.5%; high thermal conductivity graphite 1.5%.

[0027] (1) Put the waste porcelain powder into the ball mill, and carry out wet ball milling according to the weight ratio of material: ball: water = 1:1.5:1.2, until the residue of 10,000-hole sieve is 0.02%, and the porcelain slurry is obtained;

[0028] (2) Add high thermal conductivity graphite to the above porcelain slurry, and add an appropriate amount of sodium hydroxymethyl cellulose, and mix well;

[0029] (3) Pour the mixed porcelain slurry into a mold for casting, and then sinter the molded body at 950-1000° C. to obtain the ceramic electromagnetic coupler core.

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PUM

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Abstract

The invention discloses a ceramic electromagnetic coupler core and a preparation method of the ceramic electromagnetic coupler core. The ceramic electromagnetic coupler core comprises the following components in percentages by weight: 98-98.5% of waste ceramic powder and 1.5-2% of high thermal-conductive graphite. The preparation method of the ceramic electromagnetic coupler core comprises the following steps of: carrying out wet ball milling on the waste ceramic powder in a ball mill to obtain ceramic paste; then adding the high thermal-conductive graphite and a dispersant to be uniformly mixed; and finally injecting into a mold for casting, and then sintering a green body obtained by casting at 950-1,000 DEG C. The ceramic electromagnetic coupler core has the characteristics of excellent insulativity, high temperature resistance, good thermal-conductive property, long service life and low cost and can meet the requirement of practical application.

Description

technical field [0001] The invention belongs to the field of electromagnetic energy-saving lamps, and in particular relates to a ceramic electromagnetic coupler core and a preparation method thereof. Background technique [0002] High-efficiency electromagnetic energy-saving lamps have the advantages of high light efficiency and energy saving, high power factor, high color rendering, long life, green environmental protection, optional color temperature, and no flicker. High-efficiency electromagnetic energy-saving lamps do not have filaments and electrodes. High-frequency currents are generated by high-frequency generators, which are converted into high-frequency magnetic fields by electromagnetic couplers, and the high-frequency magnetic fields excite bulb phosphors to emit light. Generally, it consists of three parts: high-frequency generator, electromagnetic coupler and bulb. [0003] The electromagnetic coupler must have the following characteristics: 1. Insulation, rat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/255H01F1/11H01F41/02C04B35/622
Inventor 林大祥
Owner GUANGDONG SHUNXIANG ENERGY SAVING LIGHTING TECH