Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Thermal sensitive ceramic chip, and thermistor and preparation method thereof

A technology of heat-sensitive ceramics and thermistors, used in thermometers with directly sensitive electrical/magnetic components, measuring heat, using electrical devices, etc., can solve problems such as affecting battery life and damaging batteries, achieving strength and Improved material stability, good material uniformity, and uniform powder particle size distribution

Inactive Publication Date: 2021-01-26
SHENZHEN SUNLORD ELECTRONICS
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the charging process, after the battery is fully charged, the temperature rises rapidly. If it is charged with a large current, it will seriously affect the life of the battery and even damage the battery.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thermal sensitive ceramic chip, and thermistor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The embodiment of the present invention also provides a method for preparing a heat-sensitive ceramic sheet, comprising the following steps:

[0032] ①The mass percentage is: 40%-47% of manganese dioxide, 50%-56% of cobalt tetroxide, 2%-5% of copper oxide, and 1%-4% of titanium dioxide are mixed by solid phase synthesis to obtain initial powder;

[0033] ② Calcining the initial powder at high temperature to form a preliminary spinel structure;

[0034] ③ The powder obtained after calcination is made into the initial green body of the ceramic sheet by pulping, casting, lamination, cutting and other processes;

[0035] ④ Sintering the obtained initial green body of the ceramic sheet to obtain the heat-sensitive ceramic sheet.

[0036] Such as figure 1 As shown, the embodiment of the present invention also provides a thermistor, including the thermosensitive ceramic chip 1 and a pair of electrodes 2 formed at both ends of the thermosensitive ceramic chip 1 . Preferably...

Embodiment 1

[0053] ① Manganese dioxide, cobalt tetroxide, copper oxide and titanium dioxide are mixed according to the mass percentage of 42%: 53%: 3%: 2% by solid phase synthesis.

[0054] ②Calcinate the mixed powder at 800°C for 6 hours.

[0055] ③ Cut the prepared powder into a rectangular body with a length of 1.80 mm, a width of 0.88 mm and a height of 0.88 m through pulping and casting lamination.

[0056] ④ Sinter the green body at 1150°C to form a heat-sensitive ceramic sheet.

[0057] ⑤ Dip the two sides of the heat-sensitive ceramic sheet in the length direction with silver-coated silver terminal paste with a silver content of 60%-90%, and then sinter at 700°C for 20 minutes to form silver electrodes.

[0058] 6. Plating a nickel layer and a tin layer on the silver electrode by means of electroplating to obtain the thermistor.

[0059] Test and comparison results: The thermistor prepared by the above method has a resistance value of 3.5kΩ at 25°C, a B value of 3900, and a maxi...

Embodiment 2

[0061] ① Manganese dioxide, cobalt tetroxide, copper oxide and titanium dioxide are mixed according to the mass percentage of 44%: 51%: 3%: 2% by solid phase synthesis.

[0062] ②Calcinate the mixed powder at 800°C for 6 hours.

[0063] ③ Cut the prepared powder into a rectangular body with a length of 1.10 mm, a width of 0.58 mm and a height of 0.58 m through pulping and casting lamination.

[0064] ④ Sinter the green body at 1150°C to form a heat-sensitive ceramic sheet.

[0065] ⑤ Dip the two sides of the heat-sensitive ceramic sheet in the length direction with silver-coated silver terminal paste with a silver content of 60%-90%, and then sinter at 700°C for 20 minutes to form silver electrodes.

[0066] 6. Plating a nickel layer and a tin layer on the silver electrode by means of electroplating to obtain the thermistor.

[0067] Test and comparison results: The thermistor prepared by the above method has a resistance value of 8kΩ at 25°C, a B value of 3970, and a maximu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistanceaaaaaaaaaa
electrical resistanceaaaaaaaaaa
electrical resistanceaaaaaaaaaa
Login to View More

Abstract

The invention relates to a thermal sensitive ceramic chip, and a thermistor and a preparation method thereof. The thermal sensitive ceramic chip is formed by mixing metal oxide powder by adopting a solid-phase synthesis method and sintering at a high temperature, wherein the metal oxide powder comprises the following components in percentage by mass: 40-47% of manganese dioxide, 50-56% of cobaltosic oxide, 2-5% of copper oxide and 1-4% of titanium dioxide. The thermistor prepared by the invention has a low resistance value R25 and a high B value, and the strength and stability of the materialare obviously improved.

Description

technical field [0001] The invention relates to a heat-sensitive ceramic sheet, a heat-sensitive resistor and a preparation method thereof. Background technique [0002] NTC thermistor can detect the temperature of a specific location and place, and measure the temperature information of the internal and external environment of the battery in nickel-cadmium, nickel-metal hydride and lithium-ion batteries: maintain the battery temperature within a certain range, thereby protecting the battery Function; prevent the wrong working state caused by the change of ambient temperature; abnormal operation and external circuit cause the battery to overheat, resulting in damage to the battery. [0003] During the charging process, after the battery is fully charged, the temperature rises rapidly. If the battery is charged with a large current, it will seriously affect the life of the battery, and even damage the battery. When the battery temperature rises rapidly, the resistance of the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/622C04B41/90G01K7/22
CPCC04B35/01C04B35/622C04B41/90C04B41/52G01K7/22C04B2235/3262C04B2235/3281C04B2235/3232C04B2235/6025C04B2235/6567C04B41/5116C04B41/4539C04B41/0072C04B41/5144C04B41/4564C04B41/5161
Inventor 黄飞王清华姚斌黄雄
Owner SHENZHEN SUNLORD ELECTRONICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com