Composition for preparing negative temperature coefficient (NTC) thermistor chip and NTC thermistor made by using composition

A thermistor and composition technology, applied in the direction of resistors with negative temperature coefficient, etc., can solve the problems of affecting the service life and measurement accuracy, insufficient chip thickness and density, easy to produce aging drift, etc., to prevent the resistance value. Drift or even failure, ensure smoothness and consistency, and the effect of good high temperature performance

Active Publication Date: 2013-12-18
HENGSHINKI ELECTRONICS QINGDAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: NTC thermistors currently on the market are affected by changes in the performance of chip raw materials during use, and are prone to aging drift, which affects their service life and measurement. Precision, especially when working at high temperature, it is easy to produce unstable resistance value output; due to insufficient thickness and density of the chip, the chip is easily broken down and failed when the current is passed repeatedly

Method used

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  • Composition for preparing negative temperature coefficient (NTC) thermistor chip and NTC thermistor made by using composition
  • Composition for preparing negative temperature coefficient (NTC) thermistor chip and NTC thermistor made by using composition
  • Composition for preparing negative temperature coefficient (NTC) thermistor chip and NTC thermistor made by using composition

Examples

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Comparison scheme
Effect test

Embodiment 1

[0078] Embodiment 1 The making of a kind of NTC thermistor

[0079] Described NTC thermistor is made according to above-mentioned two described manufacturing methods, wherein: the raw material that takes in the step (1) is: Mn 3 o 4 590g,Co 3 o 4 13g, Fe 2 o 3 115g, SiO 2 15g, NiO265g.

[0080] The performance parameters of the NTC thermistor are shown in Table 1-3.

Embodiment 2

[0081] Embodiment 2 The making of a kind of NTC thermistor

[0082] Described NTC thermistor is made according to above-mentioned two described manufacturing methods, wherein: the raw material that takes in the step (1) is: Mn 3 o 4 600g,Co 3 o 4 14g, Fe 2 o 3 109g, SiO 2 16g, NiO 262g.

[0083] The performance parameters of the NTC thermistor are shown in Table 1-3.

Embodiment 3

[0084] Embodiment 3 The making of a kind of NTC thermistor

[0085] Described NTC thermistor is made according to above-mentioned two described manufacturing methods, wherein: the raw material that takes in the step (1) is: Mn 3 o 4 610g,Co 3 o 4 15g, Fe 2 o 3 105g, SiO 2 17g, NiO 260g.

[0086] The performance parameters of the NTC thermistor are shown in Table 1-3.

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Abstract

The invention discloses a composition for preparing a negative temperature coefficient (NTC) thermistor chip and an NTC thermistor made by using the composition, belonging to the field of thermistors. The composition comprises the following components in parts by weight: 590-610 parts of Mn3O4, 13-15 parts of Co3O4, 105-115 parts of Fe2O3, 15-17 parts of SiO2 and 260-265 parts of NiO, wherein all components are nano-powder and are chemically pure. The composition is made into chip slurry through the following steps of: weighing the raw materials according to the components and the content; evenly mixing the raw materials, pouring the mixture into a ball mill, adding water and grinding for 30-50 hours; dewatering and drying the ground raw materials; and adding adhesive into the dried raw materials and evenly agitating to form the chip slurry. The invention additionally discloses a method for making the NTC thermistor by using the chip slurry. By adjusting the proportions of all components in the combination for the NTC thermistor, the service life of the thermistor is prolonged, the measurement accuracy of the thermistor is improved and the NTC thermistor is suitable for the field of high-temperature equipment such as water heaters.

Description

technical field [0001] The invention relates to the field of thermistors, in particular to a composition for preparing an NTC thermistor chip and the NTC thermistor of the chip made by using the composition. Background technique [0002] Thermistors are a type of sensitive components. They are divided into PTC (Positive Temperature Coefficient, positive temperature coefficient) thermistors and NTC (Negative Temperature Coefficient, negative temperature coefficient) thermistors according to their temperature coefficients. A typical feature of a thermistor is that it is sensitive to temperature and exhibits different resistance values ​​at different temperatures. The higher the temperature of the PTC thermistor, the greater the resistance value, and the lower the resistance value of the NTC thermistor, both belong to semiconductor devices. [0003] NTC thermistor has the advantages of high sensitivity, fast response, small size, and easy remote control and measurement. It is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/04C04B35/01C04B35/622
Inventor 苑广军苑广礼
Owner HENGSHINKI ELECTRONICS QINGDAO
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