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Magnesia crucible for synthesizing sodium-sulfur cell solid electrolyte and preparation method of magnesia crucible

A technology of solid electrolyte and sodium-sulfur battery, which is applied in the field of magnesia crucible for synthesizing solid electrolyte of sodium-sulfur battery and its preparation, which can solve the problem of affecting the comprehensive performance of electrolyte ceramic tube and battery, increasing the production cost of electrolyte ceramic tube, and unfavorable industrialization process, etc. problems, achieve the effects of eliminating the possibility of defects and impurity contamination, inhibiting the rapid volatilization of sodium components, and good thermal shock resistance

Active Publication Date: 2014-07-16
EAST CHINA ELECTRIC POWER TEST & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems have always existed in the rolling sintering process: (1) a large amount of precious metal platinum (the ratio of the used noble metal platinum to the mass of the fired electrolyte ceramic tube is about 1.5: 1) is needed in the sintering process, but the price of platinum is very expensive, which greatly affects Increased the production cost of the electrolyte ceramic tube, which is not conducive to its industrialization process; (2) solid electrolyte Na-β″-Al 2 o 3 The ceramic tube is always in a rolling state during sintering, and the tube body is in constant contact with the outsourcing crucible. The ceramic tube wall may have tiny defects such as microcracks and micropores, or other impurities may be introduced by the contamination of the crucible, which will affect the electrolyte ceramic tube and battery. comprehensive performance

Method used

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  • Magnesia crucible for synthesizing sodium-sulfur cell solid electrolyte and preparation method of magnesia crucible

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 65 parts by weight of fused magnesia powder, 26 parts by weight of heavy magnesia powder, 5 parts by weight of yttrium oxide powder, 1 part by weight of zirconia powder, 1 part by weight of aluminum oxide powder, 1 part by weight of silicon dioxide powder and 1 part by weight of calcium oxide powder were put into the mixer and mixed for 4 hours, wherein the particle range of fused magnesia powder was 60-75 μm, that of heavy magnesia powder was 5-7 μm, and the rest of the raw materials were The parts are all less than 5 μm, and the purity of all raw material components is greater than 99%.

[0027] After mixing evenly, pour it into the isostatic pressing molding rubber sleeve mold, hold the pressure for 20s under the action of 200MPa, and take it out under the pressure reduction to obtain the green body of the magnesia crucible.

[0028] Put the green magnesia crucible into a clean high-temperature gas-fired furnace, burn it to 1780°C in an air atmosphere, keep it warm f...

Embodiment 2

[0031] 70 parts by weight of fused magnesia powder, 21 parts by weight of heavy magnesia powder, 4 parts by weight of yttrium oxide powder, 1 part by weight of zirconia powder, 2 parts by weight of aluminum oxide powder, 1 part by weight of silicon dioxide powder and 1 part by weight of calcium oxide powder were put into the mixer and mixed for 4 hours, wherein the particle range of fused magnesia powder was 60-75 μm, that of heavy magnesia powder was 5-7 μm, and the rest of the raw materials were The parts are all less than 5 μm, and the purity of all raw material components is greater than 99%.

[0032] After mixing evenly, pour it into the isostatic pressing molding rubber sleeve mold, hold the pressure for 20s under the action of 190MPa, and take it out under the pressure reduction to obtain the green body of the magnesia crucible.

[0033] Put the green magnesia crucible into a clean high-temperature gas-fired furnace, burn it to 1830°C in an air atmosphere, keep it warm ...

Embodiment 3

[0036] 68 parts by weight of fused magnesia powder, 24 parts by weight of heavy magnesia powder, 4 parts by weight of yttrium oxide powder, 1 part by weight of zirconia powder, 1 part by weight of aluminum oxide powder, 1 part by weight of silicon dioxide powder and 1 part by weight of calcium oxide powder were put into the mixer and mixed for 4 hours, in which the particle range of fused magnesia powder was 60-75 μm, that of heavy magnesia powder was 5-7 μm, and the rest of the raw materials were The parts are all less than 5 μm, and the purity of all raw material components is greater than 99%.

[0037] After mixing evenly, pour it into the isostatic pressing molding rubber sleeve mold, hold the pressure for 20s under the action of 180MPa, and take it out under the pressure reduction to obtain the green body of the magnesia crucible.

[0038] Put the green magnesia crucible into a clean high-temperature gas-fired furnace, burn it to 1800°C in an air atmosphere, keep it warm ...

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Abstract

The invention discloses a magnesia crucible for synthesizing a solid electrolyte for a sodium-sulfur battery. The magnesia crucible is composed of fused magnesia powder, heavy magnesia powder, yttrium trioxide powder, zirconia powder and aluminum oxide powder , Silica powder and calcium oxide powder are mixed in a certain proportion, and then prepared by isostatic pressing and sintering. The invention also discloses a preparation method of the magnesium oxide crucible for synthesizing the solid electrolyte of the sodium-sulfur battery. The magnesium oxide crucible disclosed by the present invention can provide alkaline atmosphere protection for the solid electrolyte Na-β″-Al2O3 ceramic tube in the sintering process, and form a "sodium-rich" atmosphere in the crucible, which inhibits the rapid growth of the sodium component in the electrolyte ceramic tube product. Volatilization, while greatly reducing the production and management costs of traditional electrolyte ceramic tubes using the platinum crucible package rolling process.

Description

technical field [0001] The invention relates to a sodium-sulfur battery preparation technology, in particular to a magnesium oxide crucible for synthesizing a solid electrolyte for a sodium-sulfur battery and a preparation method thereof. Background technique [0002] Solid Electrolyte Na-β″-Al 2 o 3 Ceramics have good Na+ conductivity, and their ionic conductivity can reach 10 at room temperature. -2 S / cm order of magnitude, high performance Na-β″-Al 2 o 3 Ceramic tubes are the core components of sodium-sulfur energy storage battery systems. In the application process, Na-β″-Al is required 2 o 3 Ceramics have high ionic conductivity, high strength, and uniform and dense microstructure. Solid Electrolyte Na-β″-Al 2 o 3 The process of sintering into porcelain at high temperature is a critical step in battery fabrication, which has a decisive impact on battery assembly, performance, and manufacturing cost. [0003] In the traditional process, the solid electrolyte Na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 陈福平徐小刚祝铭茅雁
Owner EAST CHINA ELECTRIC POWER TEST & RES INST
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