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Preparation process of zirconium oxide base composite nano powder

A nano-powder, zirconia-based technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of small particle size, low benefit, narrow distribution, etc.

Inactive Publication Date: 2006-11-15
SHANGHAI UNIV
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Problems solved by technology

Physical methods have strict requirements on technology and materials, and require large investment. Although some chemical preparation methods have their own advantages, they also have shortcomings. For example, alkoxides are generally used as raw materials in hydrolysis methods, and alkoxide raw materials are expensive. If industrialized production , low benefit; the powder particles prepared by the microemulsion method have good dispersibility, small particle size and narrow distribution, but the production process is more complicated and the cost is higher

Method used

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Examples

Experimental program
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Embodiment 1

[0015] Nano ZrO in this embodiment 2 -HfO 2 -Y 2 o 3 -Sc 2 o 3 The preparation process and steps of the powder are as follows:

[0016] (1), the ZrOCl 2 ·8H 2 O, HfOCl 2 ·8H 2 O, Y (NO 3 ) 3 ·6H 2 O and Sc 2 o 3 Weigh according to the ratio of molar ratio 80:10:8:12; ZrOCl 2 ·8H 2 O, HfOCl 2 ·8H 2 O and Y (NO 3 ) 3 ·6H 2 O soluble in alcohol-water solution, Sc 2 o 3 After being dissolved in hydrochloric acid, it is also mixed in the above mixed solution to prepare metal ion Zr 4+ 、Hf 4+ , Y 3+ 、Sc 3+ A solution with a total concentration of 0.5 mol / L; the alcohol-water weight ratio of the alcohol-water solution is 5:1; and 1 wt% of the total alcohol-water solution PEG 6000 is added as a dispersant.

[0017] (2) Place the prepared solution in a constant temperature water bath and slowly heat it to 80°C while stirring; keep the reaction solution warm for 30 minutes, add ammonia water dropwise to make the pH value 12, and continue to maintain the constan...

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Abstract

The invention relates to a method to produce the composite zirconia nano powder. It is to make the ZrO2-HfO2-Y2O3-Sc2O3 nano powder in the alcohol-water solution by the method of sol-gel. The invention controls the addition of the metal ion and the PEG 6000 and adjusts the pH by adding the ammonia the process includes the sol-gel, the de-ionized water washing, the absolute ethyl alcohol filtration, drying and calcinations. The average particle diameter is 15nm.

Description

technical field [0001] The invention relates to a preparation method of zirconia-based composite nanometer powder, which belongs to the technical field of inorganic non-metallic materials. Background technique [0002] Zirconia is a widely used important ceramic material with many excellent physical and chemical properties. Yttria-doped zirconia-stabilized cubic zirconia (YSZ) has excellent oxygen ion conductivity. As an ideal solid electrolyte (also known as fast ion conductor) material, it has been widely used in solid oxide fuel cells, transparent Oxygen film and oxygen sensor. When the crystal grains of solid electrolyte materials are as small as nanometers, due to small size effects, quantum effects, and high interface volume ratio effects, their mechanical and electrical properties change greatly, which can change the performance of the material to a large extent. Therefore, the grain refinement of solid electrolyte materials is of great significance to improve the p...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/00
Inventor 甄强陈瑞芳
Owner SHANGHAI UNIV
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