Preparation method of zinc cobalt sodium silicate nano powder

A nano-powder and zinc silicate technology, which is applied in the field of sol-gel preparation of nano-scale zinc-cobalt silicate powder, can solve the problem of less microwave dielectric ceramics, achieve good sintering characteristics, low price, and simple preparation process Effect

Inactive Publication Date: 2011-10-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But about Co x Zn 2-x SiO 4 There are few reports on the soft chemical method of microwave dielectric ceramics, and the synthesis of Co by sol-gel method has not been seen. x Zn 2-x SiO 4 Report on Microwave Dielectric Ceramic Nanopowder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Press CO 0.1 Zn 1.9 SiO 4 Stoichiometric ratio, dissolve 56.523 grams of zinc nitrate hexahydrate in absolute ethanol, heat at 90°C for 30 minutes with magnetic stirring to dissolve, and obtain zinc nitrate solution; dissolve 2.91 grams of cobalt nitrate hexahydrate in absolute ethanol, heat at 90°C Stir magnetically for 45 minutes to dissolve it to obtain a cobalt nitrate solution; then mix the above two solutions, heat at 90°C and magnetically stir for 4 hours to obtain a transparent mixed solution, and control the concentration of the solution to 1mol / L;

[0019] (2) 20.833 grams of ethyl orthosilicate was dissolved in absolute ethanol, and magnetically stirred at room temperature to obtain an ethyl orthosilicate solution, and the concentration of the control solution was 0.5mol / L;

[0020] (3) Drop the mixed solution of step (1) into the tetraethyl orthosilicate solution of step (2), add HNO 3 Adjust the pH value of the solution to 3, and add deionized water ...

Embodiment 2

[0024] (1) Press CO 0.3 Zn 1.7 SiO 4 Stoichiometric ratio, dissolve 50.573 grams of zinc nitrate hexahydrate in absolute ethanol, heat at 90°C for 30 minutes with magnetic stirring to dissolve, and obtain zinc nitrate solution; dissolve 8.731 grams of cobalt nitrate hexahydrate in absolute ethanol, heat at 90°C Stir magnetically for 45 minutes to dissolve it to obtain a cobalt nitrate solution; then mix the above two solutions, heat at 90°C and magnetically stir for 4 hours to obtain a transparent mixed solution, and control the concentration of the solution to 1mol / L;

[0025] (2) 20.833 grams of ethyl orthosilicate was dissolved in absolute ethanol, and magnetically stirred at room temperature to obtain an ethyl orthosilicate solution, and the concentration of the control solution was 0.5mol / L;

[0026] (3) Drop the mixed solution of step (1) into the tetraethyl orthosilicate solution of step (2), add HNO 3 Adjust the pH of the solution to 3, and add deionized water to pr...

Embodiment 3

[0030] (1) Press CO 0.5 Zn 1.5 SiO 4Stoichiometric ratio, dissolve 44.624 grams of zinc nitrate hexahydrate in absolute ethanol, heat at 90°C for 30 minutes with magnetic stirring to dissolve, and obtain zinc nitrate solution; dissolve 14.552 grams of cobalt nitrate hexahydrate in absolute ethanol, heat at 90°C Stir magnetically for 45 minutes to dissolve it to obtain a cobalt nitrate solution; then mix the above two solutions, heat at 90°C and magnetically stir for 4 hours to obtain a transparent mixed solution, and control the concentration of the solution to 1mol / L;

[0031] (2) 20.833 grams of ethyl orthosilicate was dissolved in absolute ethanol, and magnetically stirred at room temperature to obtain an ethyl orthosilicate solution, and the concentration of the control solution was 0.5mol / L;

[0032] (3) Drop the mixed solution of step (1) into the tetraethyl orthosilicate solution of step (2), add HNO 3 Adjust the pH value of the solution to 3, and add deionized water...

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Abstract

The invention discloses a preparation method of zinc cobalt sodium silicate microwave dielectric ceramic nano powder. The method comprises the following steps: (1) firstly preparing a zinc nitrate solution and a cobalt nitrate solution and then mixing the two solutions, wherein the raw material components and molar percentage content are shown in the following formula: CoxZn2-xSiO4, and x is larger than 0 and less than or equal to 1; (2) preparing a tetraethyl orthosilicate solution; (3) dropwise adding the mixed solution in the step (1) to the tetraethyl orthosilicate solution, wherein the pH value is 2-4, adding deionized water and then magnetically stirring so as to obtain CoxZn2-xSiO4 sol; (4) drying the CoxZn2-xSiO4 sol to form jelly-shaped gel, and then drying the gel to form dried gel; and (5) thermally treating the dried gel at the temperature of 650-950 DEG C so as to obtain the CoxZn2-xSiO4 nano powder. The CoxZn2-xSiO4 nano powder prepared by using the method has an averageparticle size of 90nm and has the advantages of high purity, simple process, cheap raw material, high activity and good sintering property; and the sintering temperature of the nano power is lowered by 100-300 DEG C as compared with that of a solid phase method, and a material support is provided for preparation of high-property CoxZn2-xSiO4 microwave dielectric ceramic.

Description

technical field [0001] The invention belongs to the field of electronic information materials and components, in particular to a sol-gel preparation method of nano-scale zinc cobalt silicate (CoxZn2-xSiO4) powder. Background technique [0002] The rapid development of new communication systems such as multimedia mobile communication systems, ultra-high-speed wireless local area networks, and intelligent transportation systems has put forward higher requirements for the performance of microwave dielectric ceramics, and urgently requires the adoption of new material research methods. As a new material preparation idea, soft chemical method has been paid more and more attention in recent years. [0003] In order to improve the quality factor of microwave dielectric ceramics, in addition to selecting a low-loss dielectric ceramic material system, the advanced soft chemical method can improve material purity, refine powder particle size, and improve the sintering characteristics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/16C04B35/626C04B35/624
Inventor 张平王涛赵建渊李玲霞王玉翠
Owner TIANJIN UNIV
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