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Preparation method for monodisperse nanometer ZnO pressure-sensitive ceramic powder

A pressure-sensitive ceramic, monodisperse technology, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of large particle size, different particle size, uneven morphology of zinc oxide, etc., to achieve small leakage current and nonlinear coefficient. big effect

Inactive Publication Date: 2015-03-11
CHANGZHOU CHUANGJIE LIGHTNING PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of preparation method of ZnO pressure-sensitive ceramic material, overcome the shortcoming that traditional solid-phase method and liquid-phase method prepare nano-composite ZnO powder, and solve the problem that current ZnO pressure-sensitive ceramic material prepares powder particle size Large, and the shape of the obtained zinc oxide is uneven, and the particle size is different. According to the selection of a suitable dispersant to improve the microstructure of the ZnO powder, improve the electrical properties of the ZnO varistor ceramic material

Method used

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  • Preparation method for monodisperse nanometer ZnO pressure-sensitive ceramic powder
  • Preparation method for monodisperse nanometer ZnO pressure-sensitive ceramic powder
  • Preparation method for monodisperse nanometer ZnO pressure-sensitive ceramic powder

Examples

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Embodiment 1

[0032] 1. Preparation of nanocomposite ZnO powder

[0033] (1) Configure Zn(NO 3 ) 2 , Bi(NO 3 ) 2 , Co(NO 3 ) 2 , SbCl 3 , MnCl 2 and Cr(NO 3 ) 3 Aqueous solution, (concentration of solution is 1M) is calculated in molar percentage, according to 97% ZnO, 1% Sb 2 o 3 , 0.5% Bi 2 o 3 ,Co 3 o4 , CrO 3 , the ratio of MnO is mixed and stirred evenly.

[0034] (2) Measure 20mL of sodium dodecylsulfonate (SDS) aqueous solution, add it to the prepared mixed solution, heat and stir at 90 ℃ for 30min.

[0035] (3) Prepare 4M NaOH solution, measure 30mL and quickly add to the mixed solution to obtain a precipitate, heat in a water bath at 90°C, and continue to stir rapidly for 2h.

[0036] (4) Suction filter the obtained powder, wash thoroughly with deionized water and ethanol to remove impurities, and finally dry in a vacuum oven at 80°C for 6 hours.

[0037] 2. Preparation of ZnO varistor ceramics

[0038] (1) Prepare polyvinyl alcohol (PVA) with a mass fraction of...

Embodiment 2

[0041] In this example, when preparing nanocomposite ZnO powder, the weight of each component is the same as in Example 1, add 20mL of sodium dodecylsulfonate (SDS) aqueous solution, heat and stir at 80°C, and quickly add 30mL of 4M NaOH solution after 30min , heated in a water bath at 80°C, continued to stir rapidly for 2h, filtered and washed the above-mentioned precipitate to remove impurities, and finally dried in a vacuum oven at 80°C for 6h; the above-mentioned materials were prepared into ZnO pressure-sensitive Ceramics, the difference is that the ceramic sintering temperature is 1100°C.

Embodiment 3

[0043] In this example, when preparing nanocomposite ZnO powder, the weight of each component is the same as in Example 1, add 20mL of sodium dodecylsulfonate (SDS) aqueous solution, heat and stir at 70°C, and quickly add 30mL of 4M NaOH solution after 30min , heated in a water bath at 70°C, continued to stir rapidly for 2h, filtered and washed the above-mentioned precipitate to remove impurities, and finally dried in a vacuum oven at 80°C for 6h; the above-mentioned materials were prepared into ZnO pressure-sensitive Ceramics, the difference is that the ceramic sintering temperature is 1150°C.

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Abstract

The invention relates to nanometer zinc oxide, especially relates to a preparation method for a monodisperse nanometer ZnO pressure-sensitive ceramic powder, and belongs to the technical field of preparation and application of electronic ceramic. According to the preparation method, sodium dodecanesulphonate (SDS) is mainly employed as a dispersant for synthesizing the nanometer composite ZnO powder so as to prepare the high-performance ZnO pressure-sensitive ceramic powder. By employing sodium dodecanesulphonate (SDS) as a dispersant for synthesizing nanometer composite ZnO, the obtained powder is relatively small in dimension, homogeneous in morphology, uniform in phase dispersion and high in powder purity, and helps to effectively improve the electric performances of the ZnO pressure-sensitive ceramic.

Description

technical field [0001] The invention relates to nano zinc oxide, in particular to a method for preparing monodisperse nano ZnO pressure-sensitive ceramic powder, and belongs to the technical field of electronic ceramic preparation and application. Background technique [0002] Zinc oxide (ZnO) is an n-type direct wide bandgap metal oxide semiconductor material (3.36V), with high exciton binding energy (60meV), good chemical and thermal stability; ZnO is doped with trace amounts of Bi, The varistor ceramics made of Pr, Co, Cr, Mn and other elements have extraordinary nonlinear characteristics; the working principle of zinc oxide varistor ceramics is based on the volt-ampere (I-V) nonlinear characteristics, that is, when the voltage is lower than a certain critical When the value is high, the resistance of the varistor is very high, which is equivalent to an insulator. When the voltage exceeds this critical value, the resistance decreases sharply and is close to a conductor. ...

Claims

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Application Information

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IPC IPC(8): C01G9/02C04B35/453
CPCC04B35/453C04B35/632C04B35/63416C04B2235/3241C04B2235/3262C04B2235/3275C04B2235/3294C04B2235/3298C04B2235/656C04B2235/6567C04B2235/658C04B2235/781
Inventor 王茂华束静马小玉江雯
Owner CHANGZHOU CHUANGJIE LIGHTNING PROTECTION
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