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Method for preparing nano powder material

A technology of nano-powder and powder material, which is applied in nano-structure manufacturing, nano-technology, nano-technology and other directions, can solve the problems of powder particle size distribution and unsatisfactory sintering activity, and achieve social and economic benefits. Narrow distribution and high sintering activity

Inactive Publication Date: 2011-02-02
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When preparing ceramic powder materials with anhydrous alcohols as solvents, ammonia water or other inorganic bases and aqueous solutions of other inorganic precipitants are usually used as precipitants. Although this weakens the degree of agglomeration of the powder to a certain extent, the synthesized The agglomeration of the powder is still serious, so that the particle size distribution and sintering activity of the powder are not ideal

Method used

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  • Method for preparing nano powder material
  • Method for preparing nano powder material
  • Method for preparing nano powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Nano 8YSZ (8mol% Y 2 O 3 -92mol% ZrO 2 ) preparation:

[0031] First start with Y(NO 3 ) 3 ·6H 2 O and ZrO (NO 3 ) 2 ·8H 2 O is used as raw material, and absolute ethanol is used as solvent to prepare 400 mL of nitrate mixed solution of yttrium nitrate and zirconium oxynitrate with a total metal ion concentration of 0.10 mol / L. Using ethanol as a solvent, 400 mL of an ethanolamine ethanol solution with an ethanolamine concentration of 1.0 mol / L was prepared, and 1.5 wt.% PEG6000 was added as a surfactant based on the mass of the final synthetic powder, and stirred and heated to dissolve it to form a transparent solution. Under constant stirring, the above-mentioned nitrate mixed solution was added to the ethanolamine ethanol solution to obtain a precipitated suspension; continued stirring for 30 minutes, allowed to stand for ageing for 12 hours, then filtered, and washed 3 times with absolute ethanol to obtain the precipitate, Vacuum dry at 75°C for 6h, grind a...

Embodiment 2

[0034] Nano ZrO 2Preparation of:

[0035] First, ZrO (NO 3 ) 2 ·8H 2 O is used as raw material, and anhydrous isopropanol is used as solvent to prepare 400 mL of nitrate mixed solution of yttrium nitrate and zirconium oxynitrate with a total metal ion concentration of 0.05 mol / L. Using isopropanol as a solvent, prepare 400 mL of an ethanolamine isopropanol solution with an ethanolamine concentration of 0.25 mol / IL, and add 0.5 wt.% PEG2000 based on the final synthetic powder mass as a surfactant, stir and heat to dissolve it A clear solution was formed. Under constant stirring, the above-mentioned nitrate mixed solution was added to the ethanolamine isopropanol solution to obtain a precipitation suspension; continued stirring for 30 minutes, allowed to stand for ageing for 6 hours, then filtered, and washed 3 times with anhydrous n-butanol The precipitate was obtained, vacuum-dried at 110 °C for 6 hours, ground and then calcined at 600 °C for 4 hours; using ethanol as sol...

Embodiment 3

[0038] Nano 10ScSZ-1CeO 2 (10mol% Sc 2 O 3 -89mol% ZrO 2 -1mol% CeO 2 ) preparation:

[0039] First start with Sc(NO 3 ) 3 ·4H 2 O, Ce (NO 3 ) 3 ·6H 2 O and ZrO (NO 3 ) 2 ·8H 2 O is used as raw material, and absolute ethanol is used as solvent to prepare 400 mL of nitrate mixed solution of yttrium nitrate and zirconium oxynitrate with a total metal ion concentration of 0.25 mol / L. Using ethanol as a solvent, 400 mL of an ethanolamine ethanol solution with an ethanolamine concentration of 1.5 mol / L was prepared, and 3.0 wt.% PEG6000 was added as a surfactant based on the mass of the final synthetic powder, and stirred and heated to dissolve it to form a transparent solution. Under constant stirring, the above-mentioned nitrate mixed solution was added to the ethanolamine ethanol solution to obtain a precipitated suspension; the stirring was continued for 15 minutes, allowed to stand for ageing for 2 hours, then filtered, and washed 3 times with absolute ethanol to ...

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Abstract

The invention relates to a method for preparing a nano powder material, and belongs to the field of inorganic synthesis and material chemistry. In the method, a crystalline hydrate of nitrate is taken as a raw material, anhydrous C2 to C4 alcohols are taken as a solvent, ethanolamine is taken as a precipitator; and the nano powder material, such as zirconium oxide, cerium oxide and the like, is prepared by a coprecipitation method. The method overcomes the defects of nonuniform precipitation, easy aggregation, need of special drying method and equipment, and the like in the conventional coprecipitation method in which water is taken as the solvent, and an inorganic base or an inorganic salt is taken as the precipitator; and the prepared nano powder material, such as zirconium oxide and cerium oxide has the advantages of small grain size (the grain size is 6 to 20nm), small particle size, narrow particle size distribution range (the particle size distribution range is 50 to 150nm), no hard aggregation, high sintering activity and the like. The prepared nano powder material is suitable for the fields of a solid oxide fuel cell, a chemical sensor, a special functional ceramic, a catalyst or a catalyst carrier and the like.

Description

technical field [0001] The invention belongs to the field of inorganic synthesis and material chemistry, and particularly relates to a preparation method of nanometer powder material. Specifically, the crystalline hydrate of nitrate is used as raw material, anhydrous C2-C4 alcohol is used as solvent, organic base-ethanolamine is used as precipitant, and zirconia and cerium oxide nano-powder materials are prepared by coprecipitation method. a method. Background technique [0002] The commonly used wet chemical preparation methods of nano-powders mainly include co-precipitation method, alkoxide hydrolysis method, sol-gel method, hydrothermal method and combustion method. Among them, the co-precipitation method has a good application prospect in the industrial field due to its advantages of accurately controlling the content of each component, low cost, simple process, and easy large-scale production. However, in the process of preparing powder by co-precipitation method, an ...

Claims

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Application Information

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IPC IPC(8): C01F17/00C01G25/02B82B3/00
Inventor 雷泽韩敏芳周龙蒋先锋彭苏萍王丽娜
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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