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Low-temperature salt catalytic synthesis method of phosphorite structure lanthanum germinate powder material

A technology of powder material and synthesis method, applied in structural parts, fuel cells, electrochemical generators and other directions, to achieve the effects of good crystal morphology, low energy consumption and simple preparation process

Inactive Publication Date: 2017-05-31
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, the apatite structure La 9.33 Ge 6 o 26 The low-temperature salt-catalyzed synthesis method of electrolyte powder materials has not been reported at home and abroad

Method used

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  • Low-temperature salt catalytic synthesis method of phosphorite structure lanthanum germinate powder material
  • Low-temperature salt catalytic synthesis method of phosphorite structure lanthanum germinate powder material
  • Low-temperature salt catalytic synthesis method of phosphorite structure lanthanum germinate powder material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use lanthanum oxide and germanium oxide as the reaction raw materials, the molar mass ratio is 9.33:12, and lithium chloride is used as the catalyst. The mass ratio of LiCl to the initial reaction raw materials is 2:1. dehydrated ethanol; the mixture is ball-milled with a star ball mill, the mixture after ball milling is poured into a 500ml beaker, and put into an oven for drying at a temperature of 100°C for 24 hours; the mixture after drying Put it into a vertical tube furnace with a crucible, and sinter at 500°C for 6 hours; use the self-assembled washing device to wash off the lithium chloride in the powder with deionized water, and the washing liquid Titration detection with silver nitrate solution, after confirming that there is no white flocculent precipitate, continue to wash twice; put the washed powder into a 250ml beaker, and dry it in a drying oven at 100°C for 24 hours to obtain the expected product.

[0031] figure 2 with image 3 Given the original mix...

Embodiment 2

[0033] Use lanthanum oxide and germanium oxide as the reaction raw materials, the molar ratio is 9.33:12, and lithium chloride is used as the catalyst. The mass ratio of LiCl to the initial reaction raw materials is 2:1. Anhydrous ethanol; the mixture is ball-milled with a star ball mill, the mixture after ball milling is poured into a 500ml beaker, and put into an oven for drying, the drying temperature is 100°C, and the time is 24 hours; the dried mixture is used The crucible was loaded into a vertical tube furnace and sintered at 550°C for 6 hours; the sintered powder was washed off the lithium chloride in the powder with deionized water using a self-assembled washing device, and the washing liquid was washed with Titration detection of silver nitrate solution, after confirming that there is no white flocculent precipitate, continue to wash twice; put the washed powder into a 250ml beaker, and dry it in a drying oven at 100°C for 24 hours to obtain the expected product.

[...

Embodiment 3

[0036] Use lanthanum oxide and germanium oxide as the reaction raw materials, the molar ratio is 9.33:12, and lithium chloride is used as the catalyst. The mass ratio of LiCl to the initial reaction raw materials is 2:1. Anhydrous ethanol; the mixture is ball-milled with a star ball mill, the mixture after ball milling is poured into a 500ml beaker, and put into an oven for drying, the drying temperature is 100°C, and the time is 24 hours; the dried mixture is used The crucible was loaded into a vertical tube furnace and sintered at 600°C for 6 hours; the sintered powder was washed off the lithium chloride in the powder with deionized water using a self-assembled washing device, and the washing liquid was washed with Titration detection of silver nitrate solution, after confirming that there is no white flocculent precipitate, continue to wash twice; put the washed powder into a 250ml beaker, and dry it in a drying oven at 100°C for 24 hours to obtain the expected product.

[...

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Abstract

The invention provides a low-temperature salt catalytic synthesis method of a phosphorite structure lanthanum germinate powder material, and belongs to the technical field of medium-temperature solid oxide fuel battery electrolyte materiasl. Lanthanum oxide and germanium oxide are used as initial reaction raw materials; LiCl is used as a salt catalyst; a reaction raw material and the catalyst are subjected to technical flow processes of mechanical mixing, grinding, early stage heat treatment, low-temperature sintering and the like. After the reaction is completed, a deionized water solvent is used for dissolving the salt catalyst; the apatite structure lanthanum germinate powder material can be obtained. The method provided by the invention has the advantages that the germanium volatilization loss under the high-temperature sintering conditions can be avoided; the advantages of simple process, low synthesis temperature, uniform chemical ingredients of the prepared powder, small particle diameter of particles, good crystal appearance, high phase purity and the like are realized. The phosphorite structure lanthanum germinate powder material is used as a medium-temperature solid oxide fuel battery electrolyte material; the conductivity reaches the order of the conventional high-temperature electrolyte material, so that the material is applicable to practical use and is suitable for industrial application and popularization.

Description

technical field [0001] The invention belongs to the technical field of medium temperature solid oxide fuel cell electrolyte materials. Involving low-temperature salt-catalyzed preparation of apatite-structured La 9.33 Ge 6 o 26 The synthetic method of electrolyte powder material, wherein with lanthanum oxide (La 2 o 3 ) and germanium oxide (GeO 2 ) is the initial reaction raw material, lithium chloride (LiCl) is the salt catalyst. Background technique [0002] In today's society, the economy is developing rapidly, energy consumption is increasing sharply, and energy problems are becoming increasingly severe. People have realized the importance of developing new clean energy. The research, development and application of intermediate temperature solid oxide fuel cell (IT-SOFC) has become a major frontier topic for developing low-carbon economy, solving energy shortage and promoting sustainable development of resources. The new solid electrolyte material in the middle te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016H01M8/124
CPCH01M8/1016H01M8/1246H01M2008/1293H01M2300/0071Y02E60/50
Inventor 高伟韩作良殷红高丽莹李鑫李鑫峡孙多
Owner JILIN UNIV
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