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Temperature sensing material with negative temperature coefficient effect and method for preparing same

A technology with negative temperature coefficient and effect, applied in the fields of chemical industry and electronics, it can solve the problems of high use cost and high material cost, and achieve the effect of simple structure

Inactive Publication Date: 2005-06-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The destructive temperature detector is a one-time-use temperature detector, and the cost of use is high; the large-area non-destructive temperature detector is currently mostly imported from abroad, and the material cost is relatively high

Method used

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  • Temperature sensing material with negative temperature coefficient effect and method for preparing same
  • Temperature sensing material with negative temperature coefficient effect and method for preparing same
  • Temperature sensing material with negative temperature coefficient effect and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a high-speed mixer, add 5 parts of heat-sensitive organic-inorganic composite powder, 50 parts of dibutyl phthalate, 20 parts of epoxy soybean oil, mix at 500 rpm for 5 minutes, add 100 parts of polyvinyl chloride, 5 parts of tribasic lead sulfate, 5 parts of dibasic lead phthalate, 2 parts of oxidized polyethylene wax, 5 parts of ACR, mixed at 80°C and 2500 rpm for 15 minutes, masticated with an internal mixer for 10 minutes, Granulating and extruding to obtain a temperature-sensitive material with a negative temperature coefficient effect.

Embodiment 2

[0022] In a high-speed mixer, add 45 parts of heat-sensitive organic-inorganic composite powder, 60 parts of trimellitate, and 20 parts of dioctyl maleate, mix at a low speed of 1000 rpm for 5 minutes, add polyethylene / 10 parts of vinyl acetate EVA, 90 parts of polyvinyl chloride, 10 parts of tribasic lead sulfate, 8 parts of dibasic lead phosphite, 2 parts of oleic acid amide, 3 parts of chlorinated paraffin, 2 parts of talcum powder, at 100 ℃ 2500 R / M mixing for 10 minutes, masticating with an extruder for 20 minutes, granulation and extrusion molding to obtain a temperature-sensitive material with a negative temperature coefficient effect.

Embodiment 3

[0024] In a high-speed mixer, add 20 parts of heat-sensitive organic-inorganic composite powder, 40 parts of dibutyl phthalate, and 10 parts of epoxy dioctyl soybean oil, mix at 1500 rpm for 3 minutes, add chloroprene 100 parts of rubber, 2 parts of dibutyltin lauryl mercaptide, 3 parts of zinc stearate, 3 parts of calcium laurate, 1 part of butyl stearate, 3 parts of chlorinated paraffin, 1 part of erucamide, 8 parts of AMS, carbonic acid 8 parts of calcium, mixed at 120°C and 3500 rpm for 12 minutes at high speed, masticated with an internal mixer for 10 minutes, granulated and extruded to obtain a temperature-sensitive material with a negative temperature coefficient effect.

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Abstract

The invention provides a temperature sensing material with negative temperature coefficient effect and method for preparing process, wherein the NTC material comprises polymer, temperature-sensitive organic-inorganic composite powder and auxiliary agent, wherein the temperature on certain spot of the temperature-sensitive material changes, the resistance will be lowered substantially, thus the value of resistance of the detecting circuit will be changed greatly. The conductivity process of the temperature-sensitive material is realized through carrier supply by the temperature-sensitive organic-inorganic composite powder.

Description

technical field [0001] The invention relates to the technical fields of chemical industry and electronics, in particular to a temperature-sensing material with a negative temperature coefficient effect (NTC) and a preparation method thereof. The temperature range of this temperature-sensing material is 0-250°C, and it can be used as a recoverable alarm cable, temperature-sensing detector, equipment overheating protection device, temperature controller, etc. Background technique [0002] General temperature monitoring components such as thermocouples, platinum resistors, and ceramic thermistors can only measure the temperature in a narrow area (which can be abstracted as a point). In some occasions (such as large buildings, rainy, foggy and sandy open-air environments, various industrial sites, flammable and explosive dangerous places, protective tunnels, cables, conveyor belts, various pipelines, etc.), it is necessary to perform a larger second Temperature monitoring in th...

Claims

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Application Information

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IPC IPC(8): C08K5/521C08L11/00C08L23/04C08L23/16C08L27/06C08L27/12C09K5/14
Inventor 游波武利民施剑秋王秀萍宋士敏曹云
Owner FUDAN UNIV
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