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Preparation of nano crystallized bismuth oxide based oxygen ion conductive solid electrolyte

The technology of solid electrolyte and ion conductor is applied in the field of preparation of nanocrystalline bismuth oxide-based oxygen ion conductor solid electrolyte, which can solve the problems of poor chemical stability of oxygen ion conductor and the like, so as to speed up the reaction sintering process, reduce the sintering time, and reduce the sintering temperature Effect

Inactive Publication Date: 2005-02-23
SHANGHAI UNIV
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Problems solved by technology

However, the ionic conductivity, strength, toughness and thermal shock resistance of such materials need to be further improved.
In addition, the stable ZrO 2 , ThO 2 , HfO 2 The working temperature of the oxygen-based ion conductor is too high, Na-β-Al 2 o 3 Oxygen ion conductors have poor chemical stability

Method used

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  • Preparation of nano crystallized bismuth oxide based oxygen ion conductive solid electrolyte

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Embodiment 1

[0024] Embodiment one: the present embodiment is to prepare nanocrystalline Bi 2 o 3 -Y 2 o 3 A process for a solid electrolyte, specifically comprising the steps of:

[0025] a. Preparation of nano-Bi 2 o 3 +Y 2 o 3 Mixed powder raw materials: first use analytically pure 75mol% Bi(NO 3 )3 ·5H 2 O and 25mol% Y (NO 3 ) 3 ·6H 2 O is mixed and dissolved in the least amount of dilute nitric acid solution to prepare (Bi 3+ +Y 3+ ) 100ml of a mixed solution with a total concentration of 0.1mol / l. Then use analytically pure ammonia and distilled water to make 1.26mol / l ammonia solution 600ml according to the ratio of 1: 10, and add the polyethylene glycol PEG6000 dispersant that accounts for mixed solution total amount 2% (mass percentage), the pH of ammonia solution ≈12. Then, at room temperature, the mixed solution was gradually titrated into excess ammonia solution containing polyethylene glycol PEG6000 dispersant to carry out hydrolysis reaction. During the titrat...

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Abstract

A process for nano crystal oxidize bismuth base oxygen ion solid electrolyte working in middle or low temperature by chemical liquid phase law and basic technics of ceramic material include reverse chemical coprecipitation method of titration and frit technics, use nano Bi2O3+Y2O3mixed power as material. The conductance rate of solid electrolyte is more than 10 to the power -6 omega to the power -1 . cm-1 in the condition of beyond 300deg.C, so it is used for gas sensor, also for fuel cell and penetrating oxygen material working in the 500deg.C or below.

Description

technical field [0001] The invention relates to a preparation method of a nanocrystalline bismuth oxide-based oxygen ion conductor solid electrolyte, which belongs to the technical field of manufacturing technology of special functional ceramics. Background technique [0002] Solid electrolyte, also known as fast ion conductor, is a solid functional ceramic material with the ability of molten salt or liquid electrolyte to conduct ions. So far, dozens of oxygen ion conductor solid electrolytes have been discovered, and the commonly used oxygen ion conductor solid electrolyte is mainly ZrO with micron-sized grains. 2 , ThO 2 , HfO 2 base and Na-β-Al 2 o 3 and some perovskite-structured oxides. However, the ionic conductivity, strength, toughness and thermal shock resistance of such materials need to be further improved. In addition, the stable ZrO 2 , ThO 2 , HfO 2 The working temperature of the oxygen-based ion conductor is too high, Na-β-Al 2 o 3 Oxygen ion conduc...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/50C04B35/622
Inventor 甄强何伟明刘建强
Owner SHANGHAI UNIV
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