Positive temperature coefficient material and thermistor containing the material

A technology of positive temperature coefficient and content, applied in the direction of resistors with positive temperature coefficient, etc., can solve the problems of poor stability, low internal resistance, large internal resistance, etc., and achieve good stability, high PTC strength, and internal resistance low effect

Active Publication Date: 2011-11-30
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of large internal resistance, poor stability and low strength of the positive temperature coefficient thermistor provided in the prior art, the present invention provides a low internal resistance, high stability and PTC Strength Positive Temperature Coefficient Thermistor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of the positive temperature coefficient thermistor provided by the present invention includes heating and melting the mixture containing resin, conductive filler, non-conductive filler and auxiliary agent, and then extruding the obtained melt into granules. Since this method is commonly used in the art Compared with the prior art, the method differs only in the raw materials used. Therefore, the preparation method of the positive temperature coefficient material will not be repeated here.

[0023] The present invention also provides a positive temperature coefficient thermistor, which includes a first electrical conductor, a positive temperature coefficient material and a second conductive conductor that are sequentially attached to the first conductive substrate, wherein the positive temperature coefficient material is The positive temperature coefficient material provided by the invention.

[0024] Wherein, the conductive substrate can be a conv...

Embodiment 1

[0033] This embodiment is used to illustrate the positive temperature coefficient material provided by the present invention and the positive temperature coefficient thermistor using the positive temperature coefficient material.

[0034] The nickel-clad copper powder that accounts for 47.5% by weight of the positive temperature coefficient material, the nickel-clad silver powder (average particle diameter is 10nm) of 2.5% by weight, the low-density polyethylene (density 0.920 g / cm) of 46.953% by weight 3 , melting point 120°C, weight average molecular weight 200,000) and 0.047% by weight of DBS, 0.5% by weight of magnesium hydroxide (average particle size is 2 μm) and aluminum hydroxide (average particle size is 4 μm) mixture (magnesium hydroxide and The weight ratio of aluminum hydroxide is 1: 2), the stearic acid of 0.5% by weight and the titanate coupling agent of 2% by weight are mixed at room temperature (25° C.) in a high mixer, first at 800 rpm The mixture was stirred ...

Embodiment 2

[0039] This embodiment is used to illustrate the positive temperature coefficient material provided by the present invention and the positive temperature coefficient thermistor using the positive temperature coefficient material.

[0040] The nickel-coated copper powder (average particle diameter is 50nm), the nickel-coated silver powder (average particle diameter is 100nm) of 1.4 weight %, the high-density polyethylene (density 0.950 gram) of 26.865 weight % of the positive temperature coefficient material / cm 3 , a melting point of 132 ° C, a weight average molecular weight of 200,000) and 0.135% by weight of DBS, 0.5% by weight of magnesium hydroxide (average particle size of 2 μm) and aluminum hydroxide (average particle size of 3 μm) mixture (magnesium hydroxide and The weight ratio of aluminum hydroxide is 1: 1), the stearic acid of 0.5% by weight and the titanate coupling agent of 2% by weight are mixed at room temperature (25° C.) in a high mixer, first at 800 rpm The...

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Abstract

The invention provides a positive temperature coefficient material, the material comprises resin, a conductive filler, a non-conductive filler and an auxiliary agent, the resin is a mixture composed of one of high-concentration polyethylene, medium-concentration polyethylene, low-concentration polyethylene and polyvinylidene fluoride and 1, 3: 2,4-dibenzylidene sorbitol, the conductive filler is a mixture composed of one of nickel coated copper powder, nickel coated iron powder and nickel coated molybdenum powder and nickel coated silver powder, the non-conductive filler is a mixture composedof one of magnesium hydroxide and magnesium oxide and one of aluminum hydroxide and alumina, simultaneously a positive temperature coefficient thermistor is provided in the invention, the thermistor comprises a first conductor, and the positive temperature coefficient material as well as a second conductive conductor which are successively attached on the first conductor, wherein the positive temperature coefficient material is the positive temperature coefficient material provided in the invention, the positive temperature coefficient thermistor has characteristics of low resistor, high positive temperature coefficient (PCT) strength and good stability.

Description

technical field [0001] The present invention relates to a kind of material, resistance containing the material and their preparation method, in particular, relates to a positive temperature coefficient material and thermistor containing the material. Background technique [0002] In 1950, Haayman et al. of Philips in the Netherlands discovered the PTC effect of materials. Since then, research and development on the mechanism exploration, material preparation, application and other aspects of this phenomenon have been started, and it has been developed for about sixty years until now. With the development of the national economy, positive temperature coefficient (PTC) thermistor elements are widely used in home appliances, communications, electronic equipment, electrical components, temperature sensing and control, heating and other fields. [0003] At present, PTC thermistors include PTC thermistors for degaussing, PTC thermistors for motor starting, PTC thermistors for ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L27/16C08K13/06C08K9/10C08K3/08C08K3/22C08K5/053H01C7/02
Inventor 刘倩倩陈炎刘彦和
Owner BYD CO LTD
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