Manganese-cobalt-copper thermistor material

A thermistor and resistivity technology, applied in the direction of resistors with negative temperature coefficients, etc., can solve the problems of limited linear relationship, narrow temperature measurement range, low stability, etc., to achieve good linearity, strong stability, and convenient application Effect

Inactive Publication Date: 2014-11-19
JURONG BOYUAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art manganese, cobalt, and copper-based formulations, if the B value is 3600-3800K, the resistivity can only be 20-80 (kΩ.mm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A manganese-cobalt-copper thermistor material, including the following components by weight percentage: Mn 2 O 3 35%, Co 2 O 3 58% and CuO7%.

[0018] The manufacturing method includes the following steps:

[0019] (1) Preparation of ceramic slurry: firstly mix the above components into powder according to weight percentage, then add ethanol, binder, and dispersant to prepare slurry, wherein powder: ethanol: binder (CK24): disperse The weight ratio of the agent (BYK110) is 1:0.3:0.5:0.08; the adhesive is CK24, which is an electronic ceramic vinyl modified adhesive. The dispersant is BYK110.

[0020] (2) Casting, placing the prepared slurry in a vacuum box, using a pipe to absorb the slurry on the water-bearing film to obtain a film with a thickness of 20-70μm, and then convey it in a loop and dry it in an oven at 30-60℃ Dry each layer, cycle to produce the number and thickness of the designed layer, after drying, separate, cut, de-glue, and sinter to obtain til...

Embodiment 2

[0033] Example 2: Basically the same as Example 1, except for the thermistor components and the ratio of powder to ethanol, binder, and dispersant, as follows:

[0034] The weight percentage of each component is as follows: Mn 2 O 3 40%, Co 2 O 3 55% and CuO5%.

[0035] The weight ratio of powder: ethanol: binder: dispersant=1:0.4:0.66:0.6.

[0036] After testing, the B value of the thermistor is 3600~3800K, and the resistivity is 0.1~5.0 (kΩ.mm).

Embodiment 3

[0037] Example 3: Basically the same as Example 1, except for the thermistor components and the ratio of powder to ethanol, binder, and dispersant, as follows:

[0038] The weight percentage of each component is as follows: Mn 2 O 3 30%, Co 2 O 3 60% and CuO10%.

[0039] The weight ratio of powder: ethanol: binder: dispersant=1:0.38:0.65:0.08.

[0040] After testing, the B value of the thermistor is 3600~3800K, and the resistivity is 0.1~5.0 (kΩ.mm).

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Abstract

The invention discloses a manganese-cobalt-copper thermistor material which comprises the following components in percent by weight: 30%-60% of Mn2O3, 40%-80% of Co2O3 and 2%-30% of CuO. The thermistor material has good linearity and can be conveniently applied to the temperature measuring industry; if the B value of the manganese, cobalt and copper formula in the prior art is 3600K-3800K, the resistivity only can be 20 (kOhm.mm)-80 (kOhm.mm), and the resistivity is difficult to reach 0.1(kOhm.mm)-5.0(kOhm.mm) when the B value is 3600K-3800K, so that a temperature measuring range is narrow; the manganese-cobalt-copper thermistor material can be used in a wider temperature range; and the resistivity and the B value are relatively moderate, so that temperature compensation can be realized in the wider range to satisfy use of a special client, and thus, the manganese-cobalt-copper thermistor material has strong stability.

Description

Technical field [0001] The invention relates to a thermistor, in particular to a manganese-cobalt-copper thermistor material. Background technique [0002] NTC (Negative Temperature Coefficient, negative temperature coefficient) thermistors are generally sintered from transition metal oxide powders. The existing transition metal oxide powders have many systems and formulas for their composition and content. The material characteristic constant B value of the thermistor is affected by the metal oxide powder formulation, and is also related to the resistivity of the thermistor. In the prior art manganese, cobalt, and copper formula, if the B value is 3600~3800K, the resistivity can only be 20~80 (kΩ.mm), the temperature measurement range is relatively narrow, the linear relationship is limited, and the stability is not high. Summary of the invention [0003] Objective of the invention: In order to overcome the shortcomings of the prior art, the objective of the present invention i...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/622H01C7/04
Inventor 王梅凤
Owner JURONG BOYUAN ELECTRONICS
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