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A kind of low-temperature preparation method of nano barium cerate powder

A barium cerate and powder technology is applied in the field of low-temperature preparation of nano-barium cerate powder, which can solve the problems of uncontrollable particle size, uneven particle distribution, large particle size of powder particles, etc. The preparation process is simple and the effect of uniform particle distribution

Active Publication Date: 2022-02-15
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder prepared by this method has the disadvantages of large particle size, uneven particle distribution, and poor dispersion, because the higher the temperature, the coarser the powder will be during the calcination process, resulting in uncontrollable particle size.

Method used

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  • A kind of low-temperature preparation method of nano barium cerate powder
  • A kind of low-temperature preparation method of nano barium cerate powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1. A low-temperature preparation method of nanometer barium cerate powder is prepared according to the following steps:

[0024] A, take by weighing 0.01mol barium nitrate, 0.01mol cerium nitrate, 0.01mol glycerin and 0.015mol PVA respectively;

[0025] B. Add an appropriate amount of PVA to deionized water, and heat it at 98°C to dissolve it, and then prepare a 0.8mol / L PVA solution, add glycerin to it, and stir continuously to prepare an aqueous micellar liquid;

[0026] C. Add barium nitrate and cerium nitrate to the aqueous micellar liquid, and continuously stir the solution on a magnetic stirrer to become a viscous state to obtain a mixed solution;

[0027] D. Heating the mixed solution at 95°C to remove all water until it becomes a jelly-like substance to obtain a jelly-like substance;

[0028] E. Take out the jelly and place it in a pure aluminum oxide crucible, and calcinate it in a muffle furnace at 750°C for 8 hours without pressure. The jelly will r...

Embodiment 2

[0029] Example 2. A low-temperature preparation method of nanometer barium cerate powder is prepared according to the following steps:

[0030] A, take by weighing 0.015mol barium nitrate, 0.015mol cerium nitrate, 0.02mol glycerol and 0.03mol PVA respectively;

[0031] B. Add PVA to an appropriate amount of deionized water, and heat it at 95°C to dissolve it, and then prepare a 1.2mol / L PVA solution, add glycerin to it, and stir continuously to prepare an aqueous micellar liquid;

[0032] C. Add barium nitrate and cerium nitrate to the aqueous micellar liquid, and continuously stir the solution on a magnetic stirrer to become a viscous state to obtain a mixed solution;

[0033] D. Heating the mixed solution at 98°C to remove all water until it becomes a jelly-like substance to obtain a jelly-like substance;

[0034] E. Take out the jelly and place it in a pure aluminum oxide crucible, and calcinate it in a muffle furnace at 820°C for 8 hours without pressure. The jelly will ...

Embodiment 3

[0035] Example 3. A low-temperature preparation method of nanometer barium cerate powder is prepared according to the following steps:

[0036] A, take by weighing 0.02mol barium nitrate, 0.02mol cerium nitrate, 0.03mol glycerin and 0.06mol PVA respectively;

[0037] B. Add PVA to an appropriate amount of deionized water, and heat it at 98°C to dissolve it, and then prepare a 2mol / L PVA solution, add glycerin to it, and stir continuously to prepare an aqueous micellar liquid;

[0038] C. Add barium nitrate and cerium nitrate to the aqueous micellar liquid, and continuously stir the solution on a magnetic stirrer to become a viscous state to obtain a mixed solution;

[0039] D. Heating the mixed solution at 100°C to remove all water until it becomes a jelly-like substance to obtain a jelly-like substance;

[0040] E. Take out the jelly and place it in a pure aluminum oxide crucible, and calcinate it in a muffle furnace at 850°C for 10 hours without pressure. The jelly will re...

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Abstract

The invention discloses a low-temperature preparation method of nano barium cerate powder. A, weigh barium nitrate, cerium nitrate, glycerin and PVA respectively according to the molar ratio, stand-by; B, heat and dissolve PVA in deionized water, add deionized water to adjust concentration, get PVA solution, add glycerin, stir and prepare, Obtain aqueous micelle liquid; C, add barium nitrate and cerium nitrate in aqueous micelle liquid, stir, obtain mixed solution; D, mix solution heating, obtain colloid; E, colloid is calcined, obtain Nano barium cerate powder. The invention has the beneficial effects of simple preparation process, mild preparation conditions, reduced energy consumption required by high temperature, suitable for industrial production, high product purity, good particle dispersibility, and powder particle size reaching nanometer level. And the nano barium cerate powder material of the present invention can be widely used in solid oxide fuel cells, hydrogen sensors, hydrogen concentration difference batteries and hydrogen pumps.

Description

technical field [0001] The invention relates to a nano barium cerate powder, in particular to a low-temperature preparation method of the nano barium cerate powder. Background technique [0002] The world is facing the problems of climate change and energy scarcity, and the production of fossil fuel-based electricity using standard technologies cannot meet the growing energy demand. The future of world energy IC systems lies in the implementation of efficient and environmentally friendly power generation technologies. Proton-conducting compounds can enhance the hydrogen utilization rate and promote the development of hydrogen-based research fields. Barium cerate material is a kind of proton conductor material suitable for medium temperature range, which can be applied in solid oxide fuel cells, hydrogen sensors, hydrogen concentration batteries and hydrogen pumps, etc. The reduction in the particle size of barium cerate powder can reduce the sintering temperature required f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/10C01F17/32
CPCC01F17/00C01P2002/72C01P2004/03C01P2004/62Y02P20/10
Inventor 谷肄静罗贵阳潘新伟刘源吴复忠李军旗
Owner GUIZHOU UNIV
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