Method for preparing bismuth oxide-based electrolyte material Bi<1-x>A<x>O<1.5-delta> by utilizing microwave combustion-supporting method

A bi1-xaxo1.5-, electrolyte material technology is applied in the field of preparation of bismuth oxide-based electrolyte materials, which can solve the problems of difficulty in ensuring the uniformity of powder components, difficulty in mixing raw materials uniformly, and long production cycle, and avoid high-temperature calcination. Process, heating speed, energy-saving and high-efficiency effect of yield
CN109713348AInactive Publication Date: 2019-05-03HEFEI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEFEI UNIV
Publication Date
2019-05-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing a bismuth oxide-based electrolyte material Bi<1-x>A<x>O<1.5-delta> by utilizing a microwave combustion-supporting method, and relates to the technical field of preparation of bismuth oxide-based electrolyte materials. The chemical formula of bismuth oxide-based electrolyte material is Bi<1-x>A<x>O<1.5-delta>, and the preparation method comprises thefollowing steps: taking bismuth nitrate, nitrate of elements corresponding to A and a complexing agent as reaction raw materials, performing heating and evaporating to form sol, spraying the sol through a spraying machine to form a nano-scale precursor, putting the nano-scale precursor into a microwave oven, carrying out microwave heating and combustion to prepare nano-powder, and finally performing tabletting and sintering to obtain the material. A microwave method and a self-combustion method are combined, and the interior of a reaction system is heated uniformly and rapidly through wave radiation energy during microwave heating combustion supporting, and a combustion reaction can be excited rapidly and comprehensively. The precursor uniformly and quickly generates a combustion reaction,powder can be synthesized at a high temperature in one step, the yield in unit time is high, and a later high-temperature calcination process of a common method is avoided.
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Description

technical field

[0001] The invention relates to the technical field of preparation of bismuth oxide-based electrolyte materials, in particular to a method for preparing bismuth oxide-based electrolyte materials Bi 1-x A x o 1.5-δ Methods. Background technique

[0002] Fuel cell is a new type of power generation device with high efficiency and low pollution. Through chemical action, it can directly and continuously convert the chemical energy of fuel (generally gas) into electrical energy. Solid Oxide Fuel Cell (SOFC) has attracted more and more researchers with its attractive prospect. One of the current research hotspots of SOFC is to reduce the operating temperature of SOFC so that it can work at medium temperature or even low temperature. The medium temperature electrolyte materials that have been studied include lanthanum gallate, cerium oxide, bismuth oxide, etc. Bismuth oxide is the material with the highest oxygen ion conductivity found by humans, and ZrO 2 Ele...

Claims

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