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Anion-cation co-doped zinc oxide conductive powder and preparation method thereof

An anion-cation and conductive powder technology, applied in the direction of zinc oxide/zinc hydroxide, conductive coatings, etc., can solve the problem that the whiteness of light-colored conductive powder doped with zinc oxide is not high enough, it is unfavorable for large-scale industrial production, and the preparation process is complicated To solve the problem of high density, achieve the effect of improving stability, reducing absorption ratio and improving whiteness

Active Publication Date: 2021-01-12
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many problems in the existing light-colored zinc oxide-doped conductive powder and its preparation method, mainly in the high complexity of the preparation process, which is not conducive to large-scale industrial production, and the white powder doped with zinc oxide light-colored conductive powder. Insufficient high temperature, rapid decrease in conductivity after being placed in the air for a long time, etc.

Method used

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  • Anion-cation co-doped zinc oxide conductive powder and preparation method thereof
  • Anion-cation co-doped zinc oxide conductive powder and preparation method thereof
  • Anion-cation co-doped zinc oxide conductive powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1) Accurately weigh 29.75g Zn(NO 3 ) 2 ·6H 2 O and 0.38g Al(NO 3 ) 3 9H 2 O, dissolved in 100ml deionized water, stirred for 20 minutes to form a uniform and stable solution A, weighed 20gNH 4 HCO 3 Dissolve in 100ml deionized water, stir for 20 minutes to form a uniform and stable solution B, slowly add solution B to solution A at a rate of 10ml / min, and keep stirring at a rate of 600r / min; while controlling the reaction The temperature of the solution is between 20°C and 40°C. Monitor the pH value of the reaction solution. When the pH value of the solution is close to neutral, stop adding solution B dropwise and continue stirring for 20 minutes to obtain a precipitate;

[0038] 2) The precipitate obtained from the reaction in step 1) was filtered, washed 4 times with water, and washed 2 times with ethanol (the volume ratio of the water used for washing or ethanol to the precipitate was 3:1), and then dried at 120°C for 12 hours. 0.4g of AlF with a particle size...

Embodiment 2

[0043] Accurately weigh 29.75g Zn(NO 3 ) 2 ·6H 2 O and 0.46gGa(NO 3 ) 3 9H 2 O, dissolved in 100ml deionized water, stirred for 20 minutes to form a uniform and stable solution A, weighed 20gNH 4 HCO 3Dissolve in 100ml deionized water and stir for 20 minutes to form a uniform and stable solution B. Other methods are the same as in Example 1, except that 0.4g ZnF 2 replace AlF 3 , and then mixed with the dried co-precipitated product and ball milled for 2 hours.

[0044] The whiteness of the obtained powder is 88, and the volume resistivity is 10Ωcm. After 50 days in the natural environment, the volume resistivity is 55Ωcm. When the air environment is heated to 500°C, the volume resistivity is 132Ωcm.

[0045] Comparative experiment without fluorine doping: other methods are the same as above, except that ZnF is not added during the experiment 2 Powder.

[0046] The whiteness of the obtained powder is 71, and the volume resistivity is 29Ωcm. After 50 days in the natur...

Embodiment 3

[0048] Accurately weigh 29.75g Zn(NO 3 ) 2 ·6H 2 O with 0.59g In(NO 3 ) 3 9H 2 O was dissolved in 100ml deionized water, stirred for 20 minutes to form a uniform and stable solution A, and 20g NH 4 HCO 3 Dissolve in 100ml deionized water and stir for 20 minutes to form a uniform and stable solution B. Other methods are the same as in Example 1, except that 0.4g ZnF 2 Mix with the dried co-precipitation product and ball mill for 2 hours.

[0049] The whiteness of the obtained powder is 81, and the volume resistivity is 31Ωcm. After 50 days in the natural environment, the volume resistivity is 98Ωcm. When the air environment is heated to 500°C, the volume resistivity is 180Ωcm.

[0050] Comparative experiment 3 without fluorine doping: the other methods are the same as above, except that ZnF is not added during the experiment 2 Powder.

[0051] The obtained powder has a whiteness of 65 and a volume resistivity of 136Ωcm. After being placed in the natural environment for...

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Abstract

The invention discloses anion-cation co-doped zinc oxide conductive powder and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing aluminum, galliumor indium-doped basic zinc carbonate by a coprecipitation method, then mixing the basic zinc carbonate with aluminum fluoride or zinc fluoride powder, performing ball milling, and finally performing high temperature calcination under a reducing gas atmosphere. The anion-cation co-doped zinc oxide conductive powder has the following advantages: the surface dangling bonds of the zinc oxide powder isinactivated by doped fluorine atoms to inhibit the zinc oxide light-colored conductive powder from adsorbing oxygen from air, thereby greatly improving the stability of the zinc oxide powder; the fluorine atoms can also inhibit formation of deep defects in the zinc oxide light-colored conductive powder, thereby reducing absorption of the conductive powder on visible light and improving the whiteness of the conductive powder; and the fluorine atoms can provide one more electron after substituting oxygen atoms in a zinc oxide crystalline lattice, thereby improving the conductivity of the zinc oxide light-colored conductive powder. A product prepared by the method disclosed by the invention has the characteristics of high conductivity, high whiteness, good stability of resistivity, and the like, and is suitable to serve as a filler of an antistatic coating.

Description

technical field [0001] The invention relates to an anion-cation co-doped zinc oxide conductive powder and a preparation method thereof, belonging to the field of conductive materials. Background technique [0002] Conductive powder can eliminate static electricity generated by friction, impact and other factors. Light-colored conductive powder also has the ability to reflect infrared light. It is widely used in aerospace and electronics industries, such as non-metallic plastic parts of missiles and electrical equipment. surface. The main performance parameters of light-colored conductive powder include whiteness, conductivity and stability. Light-colored conductive powder materials are mainly metals and doped metal oxides. Among them, metal light-colored conductive powders such as titanium, silver, nickel, etc. have good conductivity, but have disadvantages such as high density and poor stability. Light-colored oxide conductive powder includes indium oxide, tin oxide, ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02C09D5/24
CPCC01G9/02C01P2004/04C01P2004/80C01P2006/40C01P2006/60C09D5/24
Inventor 刘益春马剑钢张伟徐海阳李鹏
Owner NORTHEAST NORMAL UNIVERSITY
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