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Thermistor raw material and its preparation method and application

A technology of thermistors and raw materials, applied in the direction of resistors with negative temperature coefficients, etc., can solve the problems of inability to prepare thermistors, inconvenience, and limited temperature range

Active Publication Date: 2019-06-07
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the resistance value of NTC thermistor generally decreases exponentially with the increase of temperature, that is, its resistance temperature characteristic changes exponentially. This nonlinear characteristic is very inconvenient when used as a temperature measuring element, especially when combined with a computer When connected to a digital instrument, it must be linearized before it can be used, which not only complicates the circuit, but also reduces the detection accuracy, and the temperature measurement range is also limited to a certain extent.
That is to say, traditional thermistor raw materials cannot prepare thermistors whose resistance temperature characteristics change linearly.

Method used

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  • Thermistor raw material and its preparation method and application
  • Thermistor raw material and its preparation method and application
  • Thermistor raw material and its preparation method and application

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preparation example Construction

[0052] Such as figure 1 As shown, a method for preparing a thermistor raw material according to an embodiment includes the following steps S110-S140.

[0053] S110, mixing cadmium tungstate, cadmium antimonate and borosilicate zinc glass to obtain a mixture.

[0054] In the above mixture, by weight, cadmium tungstate accounts for 30-50 parts, cadmium antimonate accounts for 49-69 parts, and borosilicate-zinc glass accounts for 1-5 parts.

[0055] Among them, cadmium tungstate (CdWO 4 ) and cadmium antimonate (Cd 2 Sb 2 o 7 ), borosilicate zinc glass can be produced by domestic manufacturers.

[0056] In one embodiment, in the above mixture, by weight, cadmium tungstate accounts for 30 parts, cadmium antimonate accounts for 69 parts, and borosilicate zinc glass accounts for 1 part.

[0057] In another embodiment, in the above mixture, by weight, cadmium tungstate accounts for 50 parts, cadmium antimonate accounts for 49 parts, and borosilicate zinc glass accounts for 1 pa...

Embodiment 1

[0099] Weigh 30 parts of CdWO by weight 4 , 69 copies of Cd 2 Sb 2 o 7 and 1 part of borosilicate zinc glass to obtain a mixture. Take the mixture with a total weight of 250g and pour it into a polyurethane ball mill jar equipped with 600g of zirconium balls with a diameter of 3mm, add 250g of deionized water, seal it and wet mill it on a planetary ball mill for 4 hours at a speed of 400r / min. Pour the ground powder into a stainless steel pan, put it in an oven at 120°C and bake for 5 hours, pre-burn the dried powder in a muffle furnace at 900°C for 2 hours, and pour the pre-fired powder into a 600g container 1. In the polyurethane ball mill jar of zirconium balls with a diameter of 3 mm, add 250 g of deionized water, seal and wet mill for 4 hours on a planetary ball mill at a speed of 400 r / min. Pour the ground calcined material into a stainless steel pan, put it into an oven at 120°C and bake for 5 hours. Pass the dried powder through an 80-mesh sieve to obtain the NTC ...

Embodiment 2

[0101] Weigh 50 parts of CdWO by weight 4 , 49 copies of Cd 2 Sb 2 o 7 and 1 part of borosilicate zinc glass to obtain a mixture. Take the mixture with a total weight of 250g and pour it into a polyurethane ball mill jar equipped with 700g of zirconium balls with a diameter of 3mm, add 350g of deionized water, seal it and wet mill it on a planetary ball mill for 5 hours at a speed of 450r / min. Pour the ground powder into a stainless steel pan, put it in an oven at 130°C and bake for 4 hours, pre-burn the dried powder in a muffle furnace at 950°C for 1.5 hours, and then pour the pre-fired powder into a Add 350 g of deionized water to a polyurethane ball mill jar with 700 g of zirconium balls with a diameter of 3 mm, seal it, and wet grind it on a planetary ball mill for 5 hours at a speed of 450 r / min. Pour the ground calcined material into a stainless steel pan, put it into an oven at 130°C and bake for 4 hours. Pass the dried powder through an 80-mesh sieve to obtain the...

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Abstract

The invention discloses a thermistor raw material, a method for preparing the same and application of the thermistor raw material. The thermistor raw material comprises, by weight, 30-50 parts of cadmium tungstate (CdWO4), 49-69 parts of cadmium antimonate (Cd2Sb2O7) and 1-5 parts of zinc borosilicate glass. The thermistor raw material, the method and the application have the advantages that crystalline grains of thermistors prepared from the thermistor raw material are uniform and compact; as tested by experiments, resistance-temperature characteristics of the thermistors prepared from the thermistor raw materials can linearly vary.

Description

technical field [0001] The invention relates to the technical field of resistance materials, in particular to a thermistor raw material and its preparation method and application. Background technique [0002] Thermistor is a kind of sensitive element that is sensitive to temperature and exhibits different resistance values ​​at different temperatures. According to different temperature coefficients, it is divided into positive temperature coefficient thermistor (PTC) and negative temperature coefficient thermistor (NTC) . Among them, the negative temperature coefficient thermistor (NTC) is a kind of semiconductor material whose resistance value decreases with the increase of temperature. It has the advantages of temperature sensitivity, small size, fast response, low price and good interchangeability, and is widely used in temperature detection, temperature control and temperature compensation. [0003] However, the resistance value of NTC thermistor generally decreases e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/01C04B35/622C03C3/066C04B35/626H01C7/04
CPCC03C3/066C04B35/01C04B35/495C04B35/622C04B35/626C04B35/62615C04B35/62645C04B2235/365H01C7/04
Inventor 唐斌周庆波李强
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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