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Negative temperature coefficient thermomagnetic composite sensitive resistance material and preparation method thereof

A negative temperature coefficient, composite sensitive technology, applied in the direction of resistors with negative temperature coefficient, resistors, inorganic material magnetism, etc., can solve problems such as single temperature sensitive characteristics, achieve high uniformity, single crystal phase, sintering temperature low effect

Active Publication Date: 2021-06-25
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] NTC thermistor materials currently used in industrial production mainly use two or more transition metal oxides such as Mn, Co, Ni, Fe, and Cu as raw materials, and the main crystal phase of the obtained thermistor material is sharp. Spar structure, and only a single temperature sensitive characteristic

Method used

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  • Negative temperature coefficient thermomagnetic composite sensitive resistance material and preparation method thereof
  • Negative temperature coefficient thermomagnetic composite sensitive resistance material and preparation method thereof
  • Negative temperature coefficient thermomagnetic composite sensitive resistance material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Implementation according to the following steps, each composition in Table 1 and Table 2 is an embodiment.

[0030] first step:

[0031] Accurately weigh each raw material according to the ratio in Table 1;

[0032] Step two:

[0033] Put the above mixture into a ball mill, use zirconia balls with a diameter of 2mm as the ball milling medium, use deionized water as the solvent, and use 50wt% polyacrylic acid aqueous solution as the dispersant, according to the weight ratio of mixture: ball: water: 1:3 : 1.5 was ground for 6 hours, discharging;

[0034] third step:

[0035] Pass the dry powder obtained in the second step through a 100-mesh sieve, place it in a corundum crucible, and synthesize Ni at 850°C for 1 hour. x co y mn 3-x-y o 4 Powder;

[0036] the fourth step:

[0037] The dried powder obtained in the third step is mixed with 10 wt% polyvinyl alcohol aqueous solution and then granulated, and the granulated size is controlled at 60 mesh;

[0038] the f...

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Abstract

The invention relates to a negative temperature coefficient thermomagnetic composite sensitive resistance material and a preparation method thereof, belonging to the field of electronic component materials. The resistance material of the present invention contains the following composition in terms of oxides by weight percentage: Mn 3 o 4 73-78%, Co 2 o 3 10.5-13%, NiO 11.5-14%, CuO 0-0.5%. The formulation of the present invention does not contain Fe, which ensures high uniformity under high-temperature sintering conditions; the sintering temperature is low, only 1140°C, and has certain energy-saving advantages; raw materials are sufficient in China and the price is suitable, so that large-scale production has no Too high a cost constraint.

Description

technical field [0001] The invention relates to a thermomagnetic composite sensitive resistance material with negative temperature coefficient and a preparation method thereof, belonging to the field of electronic component materials. Background technique [0002] The negative temperature coefficient (Negative Temperature Coefficient, NTC) thermistor material is a material whose resistivity decreases with the increase of temperature. Due to its small size, simple preparation method, fast response, high sensitivity, and low price, it is widely used in the fields of temperature measurement, temperature control, and temperature compensation. [0003] NTC thermistor materials currently used in industrial production mainly use two or more transition metal oxides such as Mn, Co, Ni, Fe, and Cu as raw materials, and the main crystal phase of the obtained thermistor material is sharp. Spar structure, and only a single temperature-sensitive characteristics. The invention combines t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/01C04B35/622H01C7/04H01F1/01
CPCC04B35/016C04B35/622C04B2235/3275C04B2235/3279C04B2235/3281C04B2235/656H01C7/043H01F1/01
Inventor 刘敬松李惠琴李大伦
Owner SOUTHWEAT UNIV OF SCI & TECH
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