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Method for preparing manganese-cobalt-nickel ternary oxide nano powder material

A nano-powder and oxide technology, applied in nickel oxide/nickel hydroxide, manganese oxide/manganese hydroxide, cobalt oxide/cobalt hydroxide, etc., can solve the problem of poor powder uniformity, high experimental requirements, and high equipment requirements problem, to achieve the effect of low cost, good dispersion and good morphology

Active Publication Date: 2013-12-11
中科传感(佛山)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common is the solid-phase method, which has the advantages of simple operation, low cost, and mass production. However, the powder material obtained by pulverizing with a ball mill has a particle size of micron and poor uniformity, so it is easy to cause A series of problems such as poor uniformity of powder after sintering and low yield
The liquid-phase synthesis method includes a variety of synthesis methods such as precipitation method, sol-gel method, and hydrothermal method. In the case of uniform chemical solvents, uniform nanometer-sized powders can be obtained, and then more ideal thermistor resistivity and electrical properties can be obtained. Performance, but the operation is more complicated and the experimental requirements are relatively high
The gas phase method can improve the powder mixing degree and refine the particles, but the process is complicated, the equipment requirements are high, and it is not easy to operate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the molar ratio of Mn:Co:Ni=52:32:16, weigh 10.62g of manganese sulfate monohydrate, 10.81g of cobalt sulfate heptahydrate, and 5.11g of nickel sulfate hexahydrate, put them into a polytetrafluoroethylene ball mill jar, polytetrafluoroethylene Vinyl fluoride ball mill jar contains 150-200 grains φ 10.5 and 200 pcs φ 6 PTFE balls, then add 16.99g of anhydrous sodium sulfate for mixing, place the PTFE ball mill jar in a planetary ball mill, grind for 1 hour, wait until the mixture is complete, then add 2.8 times the mass of anhydrous sodium sulfate 47.84g of granular sodium hydroxide, after continuing ball milling for 1 minute, after the sodium hydroxide and four kinds of metal sulfates are evenly mixed, open the lid of the ball mill jar, and leave it open for 1 hour at room temperature, and wait for the sodium hydroxide to After slightly absorbing moisture, continue ball milling for 5 hours, so that a completely violent solid-solid phase reaction occurs bet...

Embodiment 2

[0026] Weigh 10.14g of manganese sulfate monohydrate, 5.62g of cobalt sulfate heptahydrate, and 7.86g of nickel sulfate hexahydrate according to the molar ratio of Mn:Co:Ni=60:20:20, and put them into a polytetrafluoroethylene ball mill jar. Vinyl ball mill jar contains 150-200 grains φ 10.5 and 200 pcs φ 6 polytetrafluoroethylene balls, then add 14.2g of anhydrous sodium sulfate to mix, then place the polytetrafluoroethylene ball mill jar in a planetary ball mill, grind for 2 hours, wait until the mixture is complete, then add 5.6 times the mass of anhydrous sodium sulfate 88g of granular sodium hydroxide, continue ball milling for 5 minutes, after the sodium hydroxide and four kinds of metal sulfates are evenly mixed, open the lid of the ball mill jar, leave it open for 1.5 hours at room temperature, and wait for the sodium hydroxide to absorb slightly Tidal, continue ball milling 6 hours, make completely violent solid-solid phase reaction between metal sulfate and sodium h...

Embodiment 3

[0030] Weigh 8.45g of manganese sulfate monohydrate, 8.43g of cobalt sulfate heptahydrate, and 5.24g of nickel sulfate hexahydrate according to the molar ratio Mn:Co:Ni=50:30:20, and put them into a polytetrafluoroethylene ball mill jar, polytetrafluoroethylene The vinyl fluoride ball mill jar contains 150-200 grains φ 10.5 and 200 pcs φ 6 polytetrafluoroethylene balls, then add 14.2g of anhydrous sodium sulfate to mix, then place the polytetrafluoroethylene ball mill jar in a planetary ball mill, grind for 3 hours, wait until the mixture is complete, then add 4.2 times the mass of anhydrous sodium sulfate 60g of granular sodium hydroxide, after continuing ball milling for 10 minutes, after the sodium hydroxide and four kinds of metal sulfates are evenly mixed, open the lid of the ball mill jar, and leave it open for 2 hours at room temperature, until the sodium hydroxide is slightly After absorbing moisture, continue ball milling for 5-8 hours to make a completely violent so...

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Abstract

The invention relates to a method for preparing a manganese-cobalt-nickel ternary oxide nano powder material, which is an improved method for synthesizing the Mn-Co-Ni ternary oxide nano powder by a room temperature solid phase method. The method comprises the following steps: firstly, using sulfate of manganese, cobalt, nickel and sodium and sodium hydroxide as the raw materials; carrying out ball milling, washing, drying and calcination on the raw material powder to obtain the nano powder. The method has the advantages of simplicity and convenience for operation, low cost, short period, high yield and no pollution to the environment; the obtained Mn-Co-Ni ternary oxide nano powder is of a spinel structure and has a small grain size, a good shape, good dispersibility and high quality.

Description

technical field [0001] The invention relates to a preparation method of a manganese, cobalt and nickel ternary system oxide nanometer powder material applied to an NTC thermistor. Background technique [0002] Negative Temperature Coefficient (NTC) resistors refer to materials whose resistance decreases exponentially with increasing temperature within the operating temperature range. It occupies a very important position in military, aerospace, home appliances, automobiles and other application fields. In particular, Mn-Co-Ni-O type NTC thermosensitive materials with high B value, low resistivity and good thermal stability have been widely used in the field of space infrared detection and become the best choice for the preparation of uncooled infrared detectors. Ideal material. With the continuous improvement of theoretical research and preparation technology, the electrical properties, thermal stability and repeatability of materials have been greatly improved. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04C01G51/04C01G45/02
Inventor 高博孔雯雯常爱民蒋春萍陈龙赵鹏君
Owner 中科传感(佛山)科技有限公司
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