Preparation method of yttria-stabilized zirconia tetragonal nano powder with high specific surface area

A technology of stable zirconia and high specific surface area, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of difficult control conditions, high raw material costs, long production cycle, etc., and achieve reduction Lower sintering temperature, improved mechanical properties, and improved densification

Active Publication Date: 2014-01-22
赣州点金新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sol-gel method has the disadvantages of high cost of raw materials and pollution to the environment, long processing time, colloidal particles and gel filtration, and washing are not easy to control.
The problem of hard agglomeration of the powder obtained by co-precipitation is serious, the sintering activity of the powder is poor, the reaction conditions of the hydrothermal law are harsh, and the equipment is complicated and expensive
Other methods also have disadvantages such as poor performance of the prepared powder or high requirements for preparation equipment, long production cycle, and difficult control conditions.

Method used

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  • Preparation method of yttria-stabilized zirconia tetragonal nano powder with high specific surface area
  • Preparation method of yttria-stabilized zirconia tetragonal nano powder with high specific surface area
  • Preparation method of yttria-stabilized zirconia tetragonal nano powder with high specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 3.1283 g ZrOCl 2 ·8H 2 O and 0.0339 gY 2 o 3 , add excess 1:1 nitric acid and heat to dissolve Y 2 o 3 , to form a clear solution of yttrium nitrate, the weighed ZrOCl 2 ·8H 2 O is completely dissolved in it to obtain the mixed salt solution of the metal contained in the target product, then add 1.7532 g NaCl and 1.6936 g glycine to the solution, heat to dissolve completely, then concentrate the mixed solution until it is viscous, and put it into the set temperature It is ignited in a chamber with a constant temperature of 600°C. After the combustion is completed, the product is taken out, washed, filtered, and dried to obtain a specific surface area of ​​151 m 2 g -1 of (Y 2 o 3 ) 0.015 (ZrO 2 ) 0.97 of white powder.

Embodiment 2

[0033] Weigh 3.1283 g ZrOCl 2 ·8H 2 O and 0.1149 g Y (NO 3 ) 3 ·6H 2 O, add excess 1:1 nitric acid and heat to dissolve Y 2 o 3 , to form a clear solution of yttrium nitrate, the weighed ZrOCl 2 ·8H 2 O is completely dissolved in it to obtain the mixed salt solution of the metal contained in the target product, then add 2.2365 g KCl and 1.6936 g glycine to the solution, heat and dissolve completely, then concentrate the mixed solution to a viscous state, and put it into the set temperature Ignite in a chamber with a constant temperature of 500°C. After the combustion is completed, take out the sample, wash, filter, and dry to obtain a specific surface area of ​​325 m 2 g -1 of (Y 2 o 3 ) 0.015 (ZrO 2 ) 0.97 of white powder.

Embodiment 3

[0035] Weigh 3.0315g ZrOCl 2 ·8H 2 O and 0.1236 gY 2 (CO 3 ) 3 ·3H 2 O, add excess 1:1 nitric acid and heat to dissolve Y 2 o 3 , to form a clear solution of yttrium nitrate, the weighed ZrOCl 2 ·8H 2 O is completely dissolved in it to obtain the mixed salt solution of the metal contained in the target product, then add 2.9820 g KCl and 1.0312 g urea to the solution, heat and dissolve completely, then concentrate the mixed solution until viscous, and put it into the set temperature Ignition is carried out in a chamber with a constant temperature of 500°C. After the combustion is completed, the sample is taken out, washed, filtered, and dried to obtain a specific surface area of ​​378 m 2 g -1 of (Y 2 o 3 ) 0.03 (ZrO 2 ) 0.94 of white powder.

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Abstract

A preparation method of an yttria-stabilized zirconia tetragonal nano powder with high specific surface area. The method is characterized by comprising the following steps: (1) respectively weighing zirconium oxychloride octahydrate?and an yttrium raw material according to a stoichiometric ratio of zirconium and yttrium in (Y2O3)x(ZrO2) 1-2x (0.005<=x<=0.150), according to the amount of a target product, converting the yttrium raw material into an yttrium nitrate solution by dissolving, and then completely dissolving the zirconium oxychloride octahydrate; (2) respectively adding a soluble salt and organic fuel to the solution obtained in the step (1), heating for dissolving, continuing heating and concentrating to a sticky state, igniting in a heating furnace chamber at 400-1000 DEG C, and taking out the powder after complete combustion; and (3) washing, filtering and drying the powder obtained in the step (2). The invention effectively solves the problems of serious particle sintering agglomeration and small specific area in the process of solution combustion for synthesis of zirconium oxide; the powder has specific surface area as high as 378 m<2> / g and particle size about 2.8 nm; and the materials are more accessible and cheaper, so as to facilitate industrialized preparation.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method of nano-ceramic powder with high specific surface area. Background technique [0002] ZrO 2 It is a new type of ceramic material with excellent physical and chemical properties. ZrO 2 The extremely low thermal conductivity and special crystal structure and its thermal expansion coefficient close to that of metal materials make it an important structural ceramic and electronic material. Due to ZrO 2 Excellent high temperature thermal stability and high heat insulation performance, especially suitable for ceramic coating and high temperature refractory materials. In recent years, with the ZrO 2 Discovery of phase transformation toughening technology, ZrO 2 The brittleness of ceramics is greatly improved, and its application field in engineering ceramics has also been greatly expanded. [0003] To achieve phase change toughening, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626B82Y30/00
Inventor 陈伟凡邹煌龙卓明鹏刘越王琳琳
Owner 赣州点金新材料科技有限公司
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