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Preparation method of composite metallic oxide powder

A composite metal and oxide powder technology, applied in chemical instruments and methods, zirconia, manganese compounds, etc., can solve the problems of high cost of liquid phase method, high energy consumption of solid phase method, unfriendly environment, etc., and achieve sintering activity Good, inhibit excessive growth of crystal grains, high atom utilization

Active Publication Date: 2011-08-31
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method for preparing composite metal oxide powders in view of the shortcomings of the existing solid-phase method and liquid-phase method for preparing composite metal oxide powders, which overcomes the high cost of the liquid-phase method , complex process, unfriendly to the environment; solid-phase method has the disadvantages of high energy consumption and poor product performance. It is an environmentally friendly preparation process with low cost, high performance and suitable for industrial production.

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  • Preparation method of composite metallic oxide powder
  • Preparation method of composite metallic oxide powder

Examples

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Embodiment 1

[0028] To prepare 1 kg of LSM submicron powder, the specific preparation method is as follows:

[0029] (1) According to the stoichiometric ratio of the LSM chemical formula, the corresponding doses of lanthanum oxide, strontium carbonate and manganese acetate are added to the ball mill tank, a certain amount of deionized water is added, and ball milled for 5 hours to obtain a slurry;

[0030] (2) Weighing 0.1 kg of sucrose and dissolving it in deionized water, adding the solution to the slurry in step (1), and ball milling for 2 hours to make it evenly mixed;

[0031] (3) Move the slurry obtained after ball milling in step (2) into an oven, and dry at 120° C. for 7 hours;

[0032] (4) Put the dried product obtained in step (3) into an electric furnace and heat-treat at 750° C. to obtain a perovskite-type LSM powder.

[0033] figure 1 It is the X-ray diffraction pattern of the perovskite-type LSM powder prepared by the above method. It can be seen from the figure that the LS...

Embodiment 2

[0035] Prepare 1 kg of YSZ submicron powder, the following is the specific preparation method:

[0036] (1) According to the stoichiometric ratio of the YSZ chemical formula, the corresponding doses of yttrium oxide and zirconia are added to the ball mill tank, a certain amount of deionized water is added, and ball milled for 6 hours to obtain a slurry;

[0037] (2) Weighing 0.4 kg of glucose and dissolving it in deionized water, adding the solution to the slurry in step (1), and ball milling for 3 hours to make it evenly mixed;

[0038] (3) Move the slurry obtained after ball milling in step (2) into an oven, and dry at 250° C. for 4 hours;

[0039] (4) Put the dried product obtained in step (3) into an electric furnace and heat-treat at 850° C. to obtain fluorite-type YSZ powder.

[0040] image 3 It is the X-ray diffraction spectrum of the fluorite-type YSZ powder prepared by the above method. It can be seen from the figure that the YSZ powder prepared by this method is a h...

Embodiment 3

[0042] To prepare 1 kg of LSC submicron powder, the specific preparation method is as follows:

[0043] (1) According to the stoichiometric ratio of the LSC chemical formula, add corresponding doses of lanthanum oxide, strontium acetate and cobalt oxide into the ball mill tank, add a certain amount of deionized water, and ball mill for 7 hours to obtain a slurry;

[0044] (2) Weighing 0.2 kilogram of citric acid is dissolved in deionized water, the solution is added in the slurry of step (1), and ball milled for 5 hours to make it evenly mixed;

[0045] (3) move the slurry obtained after ball milling in step (2) into an oven, and dry at 150° C. for 8 hours;

[0046] (4) Put the dried product obtained in step (3) into an electric furnace and heat-treat at 800° C. to obtain LSC powder with small particles, narrow particle size distribution range, and a particle size of 200 nm to 500 nm.

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Abstract

The invention discloses a preparation method of composite metallic oxide powder. The method comprises the steps of: adding a diffluent organic matter during mixing solid phases, uniformly mixing by means of ball milling, drying under a high temperature, and putting the mixture into an electric furnace under the temperature of 600-900DEG C for thermal treatment so as to obtain a composite metallicoxide powder product. The diffluent organic matter is complexed with metal ions by using the ball-milling energy, so that the phase-forming difficulty of the product is reduced, and the product purity is improved; and the diffluent organic matter plays a part in space limit during the thermal treatment, so that the crystalline grain excessive growth of the composite metallic oxide powder product can be restrained and the happening of aggregation can be effectively reduced. Compared with the prior art, the method is low in cost, simple in technology, and environment-friendly, and suitable for the industrial production. The prepared composite metallic oxide powder is small in crystalline grain, pure in material phase, uniform in granularity, small in aggregation, and good in sintering activity.

Description

technical field [0001] The invention relates to the technical field of metal oxides, in particular to a preparation method of composite metal oxide powder. Background technique [0002] Composite metal oxide inorganic materials have the characteristics of gas sensitivity, magnetism, ion conductivity and catalytic activity, and have a wide range of applications in the fields of information, energy, electronics, metallurgy, aerospace, chemical industry, biology and medicine. [0003] Among composite metal oxides, fluorite and perovskite have attracted much attention due to their versatility due to their variable composition and structure. In renewable energy, solid oxide fuel cells (SOFC), known for their high power generation efficiency and non-pollution, are used to replace traditional fossil energy. The electrolyte material is zirconia-based composite oxide or ceria-based composite oxide with a fluorite structure. Composite oxides, wherein the zirconia-based composite oxid...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01G51/04
CPCC01G45/1264C01P2002/72C01B13/185C01G25/02
Inventor 颜雪冬王蔚国王建新孙嘉隆
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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