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

Inactive Publication Date: 2019-05-03
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is difficult to mix the raw materials evenly in this technical solution, and it is difficult to ensure the uniformity of the po

Method used

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  • Method for preparing bismuth oxide-based electrolyte material Bi&lt;1-x&gt;A&lt;x&gt;O&lt;1.5-delta&gt; by utilizing microwave combustion-supporting method
  • Method for preparing bismuth oxide-based electrolyte material Bi&lt;1-x&gt;A&lt;x&gt;O&lt;1.5-delta&gt; by utilizing microwave combustion-supporting method
  • Method for preparing bismuth oxide-based electrolyte material Bi&lt;1-x&gt;A&lt;x&gt;O&lt;1.5-delta&gt; by utilizing microwave combustion-supporting method

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Experimental program
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Embodiment 1

[0026] According to Bi 0.8 T m 0.2 o 1.5 Stoichiometric ratio weighs 8.62g of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 2.06g of thulium nitrate Tm (NO 3 ) 3 ·5H 2 O, dissolved in 25mL of deionized water, stirred into a mixed solution and added 6.43g of citric acid C 6 h 8 o 7 , heated and stirred at 80°C to form a sol with a mass concentration of 20%; the sol was sprayed by a sprayer to form a nanoscale precursor; the precursor was heated and burned in a microwave oven to obtain Bi 0.8 T m 0.2 o 1.5 Nano powder. The obtained powder is dry-pressed, and the formed disc is sintered into porcelain at 800° C. for 10 hours. Bi 0.8 T m 0.2 o 1.5 The conductivity at 800°C is 0.131 S / cm.

[0027] figure 1 It is the XRD spectrum of the product obtained in Example 1 and the corresponding diffraction characteristic peaks, it can be seen that all have generated pure phase Bi 0.8 T m 0.2 o 1.5 . figure 2 It is the FE-SEM picture of the product obtained in Example 1. It ca...

Embodiment 2

[0029] According to Bi 0.75 Y 0.25 o 1.5 Stoichiometric ratio weighs 8.96g of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 2.36g of yttrium nitrate Y (NO 3 ) 3 ·6H 2 O, dissolved in 10mL of deionized water, stirred into a mixed solution and added 3.7g of glycine C 2 h 5 NO 2 , heated and stirred at 75°C to form a sol with a mass concentration of 30%; the sol was sprayed by a sprayer to form a nanoscale precursor; the precursor was heated and burned in a microwave oven to obtain Bi 0.75 Y 0.25 o 1.5 Nano powder. The obtained powder is dry-pressed and molded, and the molded disc is then kept at 900° C. for 8 hours and sintered into porcelain. Bi 0.75 Y 0.25 o 1.5 The conductivity at 800°C is 0.083 S / cm.

[0030] image 3 It is the XRD spectrum of the product obtained in Example 2 and the corresponding diffraction characteristic peaks, it can be seen that all have generated pure phase Bi 0.75 Y 0.25 o 1.5 . Figure 4 It is the FE-SEM picture of the product obtained ...

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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.

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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Application Information

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IPC IPC(8): H01M8/1246B82Y30/00
CPCY02E60/50
Inventor 田长安吉东东邵凌波谢劲松黄俊俊
Owner HEFEI UNIV
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