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

An anion-cation, 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. It can improve the stability, reduce the absorption ratio and improve the whiteness.

Active Publication Date: 2019-02-01
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 of deionized water, stirred for 20 minutes to form a homogeneous and stable solution A, weigh 20g of NH 4 HCO 3 Dissolve in 100ml of deionized water, stir for 20 minutes to form a homogeneous and stable solution B, slowly add solution B dropwise to solution A, the drop rate is 10ml / min, and keep stirring, the stirring rate is 600r / min; control the reaction at the same time The temperature of the solution is between 20°C and 40°C, and the pH value of the reaction solution is monitored. When the pH value of the solution is close to neutral, the dropwise addition of solution B is stopped, and the stirring is continued for 20 minutes to obtain precipitation;

[0038] 2) The precipitate obtained in step 1) was dried at 120° C. for 12 hours after being filtered, washed with water 4 times, washed with ethanol 2 times (the volume ratio of water or ethanol used for washing and...

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 of deionized water, stirred for 20 minutes to form a homogeneous and stable solution A, weigh 20g of NH 4 HCO 3Dissolved in 100ml of deionized water, stirred for 20 minutes to form a homogeneous and stable solution B, other methods were the same as in Example 1, except that 0.4g ZnF was used before calcination 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, the volume resistivity is 10Ωcm, the volume resistivity is 55Ωcm after being placed in the natural environment for 50 days, and the volume resistivity is 132Ωcm when the air environment is heated to 500°C.

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

[0046] The whiteness of the obtained powder is 71, ...

Embodiment 3

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

[0049] The whiteness of the obtained powder was 81, the volume resistivity was 31Ωcm, the volume resistivity was 98Ωcm after being placed in the natural environment for 50 days, and the volume resistivity was 180Ωcm when the air environment was heated to 500°C.

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

[0051] The whiteness of the obtained powder is 65, the volume resistivity is 136Ωc...

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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, and is widely used in aerospace and electronic industries, such as missiles, non-metallic plastic parts of 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, and nickel have good electrical conductivity, but have disadvantages such as high density and poor stability. Light-colored oxide conductive powders include indium oxide, tin oxide...

Claims

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Application Information

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Patent Type & Authority Applications(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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