Perovskite-like thermistor material and preparation method thereof

A thermistor, perovskite-type technology, applied in the field of perovskite-like thermistor materials and their preparation, can solve problems such as applications that have not received research attention

Active Publication Date: 2021-02-05
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its application in the normal temperature ra

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  • Perovskite-like thermistor material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a. Press Y 2 / 3 Cu 3 Ti 3.9 mn 0.1 o 12 The composition of x=0.1 weighs respectively 2.1622g of yttrium nitrate hexahydrate, 6.1934g of copper nitrate trihydrate, 11.3414g of tetrabutyl titanate, and 0.30227g of manganese nitrate tetrahydrate is dissolved in 99% ethanol to form a mixed solution, Add 250ml of ethylene glycol and 20g of citric acid, and stir for 1 hour by magnetic force to obtain a blue liquid sol;

[0017] b. Heating the blue liquid sol obtained in step a on a heating plate at a temperature of 120° C. to dehydrate until a gel is formed. After the gel is dried at a temperature of 150° C., a loose brown ash powder is obtained;

[0018] c. Grind the powder obtained in step b in a mortar and decompose it at a temperature of 350°C for 1 hour, then grind the powder again and calcinate it at a temperature of 600°C for 5 hours to obtain Y 2 / 3 Cu 3 Ti 3.9 mn 0.1 o 12 Powder;

[0019] d, the powder material that step c obtains is with 10Kg / cm 2 The press...

Embodiment 2

[0022] a. Press Y 2 / 3 Cu 3 Ti 3.7 mn 0.3 o 12 The composition of x=0.3 weighs respectively 2.1596g of yttrium nitrate hexahydrate, 6.1860g of copper nitrate trihydrate, 10.7407g of tetrabutyl titanate, and 0.90722g of manganese nitrate tetrahydrate is dissolved in 99% ethanol to form a mixed solution, Add 250ml of ethylene glycol and 20g of citric acid, and stir for 1.5 hours by magnetic force to obtain a blue liquid sol;

[0023] b. Heating the blue liquid sol obtained in step a on a heating plate at a temperature of 120° C. to dehydrate until a gel is formed. After the gel is dried at a temperature of 150° C., a loose brown ash powder is obtained;

[0024] c. Grind the powder obtained in step b in a mortar and decompose it at a temperature of 350°C for 1.5 hours, then grind the powder again and calcinate it at a temperature of 650°C for 5.5 hours to obtain Y 2 / 3 Cu 3 Ti 3.7 mn 0.3 o 12 Powder;

[0025] d, the powder material that step c obtains is with 12Kg / cm 2 T...

Embodiment 3

[0028] a. Press Y 2 / 3 Cu 3 Ti 3.5 mn 0.5 o 12 The composition of x=0.5 weighs respectively 2.1570g of yttrium nitrate hexahydrate, 6.1787g of copper nitrate trihydrate, 10.1539g of tetrabutyl titanate, and 1.5102g of manganese nitrate tetrahydrate is dissolved in 99% ethanol to form a mixed solution, Add 250ml of ethylene glycol and 20g of citric acid, and stir for 2 hours by magnetic force to obtain a blue liquid sol;

[0029] b. Heating the blue liquid sol obtained in step a on a heating plate at a temperature of 120° C. to dehydrate until a gel is formed. After the gel is dried at a temperature of 150° C., a loose brown ash powder is obtained;

[0030] c. Grind the powder obtained in step b in a mortar and decompose it at a temperature of 350°C for 2 hours, then grind the powder again and calcinate it at a temperature of 700°C for 6 hours to obtain Y 2 / 3 Cu 3 Ti 3.5 mn 0.5 o 12 Powder;

[0031] d, the powder material that step c obtains is with 14Kg / cm 2 The pres...

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Abstract

The invention relates to a perovskite-like thermistor material which is prepared by adopting a Pechini method. A Y2/3Cu3Ti<4-x>Mn<x>O12 (x is more than or equal to 0.1 and less than or equal to 1) thermal sensitive ceramic material with a perovskite-like structure can be obtained by taking yttrium nitrate hexahydrate, copper nitrate trihydrate, tetrabutyl titanate and manganous nitrate tetrahydrate as raw materials, ethylene glycol as polymerizing agent and citric acid as chelating agent, carrying out complex coordination reaction, mixing, stirring, heating, drying, grinding, calcining, regrinding, cold isostatic pressing, high-temperature sintering and electrode coating. The material constant B<-50/250> is 3579K to 4302K, and the resistivity at the temperature of 25 DEG C is 1.70*10<4> Ohm.cm to 2.20*10<7>Ohm.cm. The perovskite-like thermistor material prepared by the method is stable in performance and high in sensitivity, the thermistor material has an obvious negative temperature coefficient characteristic within the temperature range of -50 DEG C to 250 DEG C, and the material system is stable in electrical performance, high in sensitivity and suitable for manufacturing thermistors.

Description

technical field [0001] The invention relates to a perovskite-like thermistor material and a preparation method thereof. The thermistor material has obvious negative temperature coefficient characteristics in the temperature range of -50°C-250°C, and is suitable for manufacturing thermistors. new thermistor material. Background technique [0002] The monitoring and control of temperature is closely related to our daily life. Temperature sensors are ubiquitous in household, industrial, laboratory and medical treatment. Negative temperature coefficient (NTC) thermistors are widely used in various industries due to their multiple advantages such as high reliability, small size, fast response time, and low price. Negative temperature coefficient (NTC) thermistors can be divided into low-temperature (≤60°C) thermistors, normal-temperature (-60°C-300°C) thermistors and high-temperature (≥300°C) thermistors according to the operating temperature range. In recent years, perovskite-...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/622C04B35/632C04B41/88
CPCC04B35/462C04B35/622C04B35/632C04B41/5116C04B41/88C04B2235/3225C04B2235/3262C04B2235/3281C04B2235/3234
Inventor 张博魏亚鑫付志龙常爱民
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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