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Thermistor

A thermistor and resistance technology, applied in the direction of resistors, non-adjustable metal resistors, circuits, etc., can solve the problems of poor stability and unfavorable practical application, and achieve the effect of good stability and high volume expansion rate

Active Publication Date: 2011-11-09
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the material is bonded by two materials, its stability is poor, which is not conducive to practical application.

Method used

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Embodiment Construction

[0011] The thermistor of the present invention will be described in detail below with reference to the accompanying drawings.

[0012] See figure 1 , the embodiment of the present invention provides a thermistor 20 , which includes a silicone rubber matrix 22 and a plurality of carbon nanotubes 24 dispersed in the silicone rubber matrix 22 . The plurality of carbon nanotubes 24 are uniformly distributed in the silicone rubber matrix 22 , arranged randomly, and overlapped with each other, so as to form a conductive network in the silicone rubber matrix 22 . Since the thermistor is made of carbon nanotubes and silicon rubber, compared with the thermistor bonded with the two materials, it has better stability and is beneficial to practical application.

[0013] The mass percentage content of the silicone rubber matrix 22 in the thermistor 20 is greater than or equal to 85%.

[0014] The mass percentage content of the carbon nanotubes 24 in the thermistor 20 is greater than or e...

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Abstract

The invention relates to a thermistor which comprises a silicon rubber matrix and a plurality of carbon nano tubes, wherein the carbon nano tubes are uniformly dispersed in the silicon rubber matrix and mutually lap-jointed to form a conducting network. The thermistor has both NTC characteristics and PTC characteristics and dual functions of power striking current suppression and abnormal overcurrent protection and can be applied to special circuits.

Description

technical field [0001] The invention relates to a thermistor, in particular to a thermistor with both PTC and NTC characteristics. Background technique [0002] A thermistor is a resistor whose resistance changes with temperature. Thermistors can be classified into two types based on the relationship between their resistance and temperature. The characteristic that the resistance increases sharply with the rise of temperature is called the positive temperature coefficient (Positive Temperature Coefficient, PTC) characteristic, and the thermistor with this characteristic is called PTC thermistor for short; It is called the negative temperature coefficient (Negative Temperature Coefficient, NTC) characteristic, and the thermistor with this characteristic is called NTC thermistor for short. The thermistor may be composed of conductive filler filled in polymer. [0003] The Institute of Metal Research, Chinese Academy of Sciences applied on December 14, 2005, and published a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/00H01B1/24C08L83/04C08K3/04
Inventor 陈鲁倬刘长洪范守善
Owner TSINGHUA UNIV