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Solid electrolyte for hydrogen determination probe and preparation method

A solid electrolyte and hydrogen determination probe technology, which is applied in the direction of material analysis, instruments, and measuring devices through electromagnetic means, can solve the problems of solid electrolyte conductivity decline, field application limitations, and sensitivity reduction, so as to increase chemical stability and Thermal shock resistance, reduction of sintering energy consumption, and effect of error reduction

Active Publication Date: 2018-12-28
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, due to CaZr 0.9 In 0.1 o 3-a In the solid electrolyte material 2 o 3 It is unstable and volatile during the preparation and sintering process, which makes the conductivity of the solid electrolyte decrease, the sensitivity decreases, the error increases, and the field application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Solid electrolyte for hydrogen determination probe, the general formula of the electrolyte is CaZr 1-x-y-z In x sn y Y z o 3-a , where x=0.25, y=0.25, z=0.25.

[0023] A method for preparing a solid electrolyte for a hydrogen probe, comprising the following steps:

[0024] (1) Weigh the pre-dehydrated and dried In according to the molar ratio in the general formula 2 o 3 and SnO 2 The powder is mixed evenly, then heated to 600°C at a heating rate of 3°C / min for sintering for 5 hours, and pulverized to obtain a pre-powder; the particle size of the pre-powder is less than 50 microns; (2) weighed according to the molar ratio in the general formula Pre-dehydrated CaO and ZrO 2 , Y 2 o 3 , added to the pre-powder and mixed evenly to obtain a mixed powder. The particle size of the mixed powder is 50 microns; the mixed powder is pressed and molded, and then heated to 1300°C at a heating rate of 5°C / min for sintering for 4h , after cooling.

Embodiment 2

[0026] Solid electrolyte for hydrogen determination probe, the general formula of the electrolyte is CaZr 1-x-y-z In x sn y Y z o 3-a , where x=0.1, y=0.1, z=0.1.

[0027] A method for preparing a solid electrolyte for a hydrogen probe, comprising the following steps:

[0028] (1) Weigh the pre-dehydrated and dried In according to the molar ratio in the general formula 2 o 3 and SnO 2 The powder is uniformly mixed mechanically, then heated to 1000°C at a heating rate of 10°C / min for sintering for 3 hours, and crushed to obtain a pre-powder; the particle size of the pre-powder particles is less than 50 microns;

[0029] (2) Weigh the CaCO after pre-dehydration and drying according to the molar ratio in the general formula 3 or CaO and ZrO 2 , Y 2 o 3 , add to the pre-powder and use mechanical mixing to obtain a mixed powder. The particle size of the mixed powder is 10 microns; the mixed powder is pressed and molded, and then heated to 1500 ° C at a heating rate of 8 ...

Embodiment 3

[0031] Solid electrolyte for hydrogen determination probe, the general formula of the electrolyte is CaZr 1-x-y-z In x sn y Y z o 3-a , where x=0.05, y=0.05, z=0.05.

[0032] A method for preparing a solid electrolyte for a hydrogen probe, comprising the following steps:

[0033] (1) Weigh the pre-dehydrated and dried In according to the molar ratio in the general formula 2 o 3 and SnO 2 The powder is uniformly mixed mechanically, then heated to 800°C at a heating rate of 5°C / min for sintering for 4 hours, and pulverized to obtain a pre-powder; the median diameter of the pre-powder particles is less than 50 microns;

[0034] (2) Weigh CaO and ZrO after dehydration and drying in advance according to the molar ratio in the general formula 2 , Y 2 o 3, add to the pre-powder and use mechanical mixing to obtain a mixed powder. The particle diameter of the mixed powder is 25 microns; the mixed powder is pressed and molded, and then heated to 1400 ° C at a heating rate of 6...

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Abstract

The invention discloses a solid electrolyte for a hydrogen probe. The formula of the electrolyte is CaZr<1-x-y-z>In<x>Sn<y>Y<z>O<3-a>; wherein 0.05<=x<=0.25, 0<y<=0.25, and 0<Z<=0.25. The invention also discloses a preparation method of the electrolyte. The provided solid electrolyte has the advantages of high conductivity and good chemical stability. The solid electrolyte tube prepared from the provided solid electrolyte has excellent mechanical properties. The provided solid electrolyte overcomes the shortage of decreased conductivity due to volatilization of indium oxide, the stability and thermal shock resistant performance of the solid electrolyte are both enhanced; the sensitivity of electrolyte is improved, the error is reduced, and the application range is enlarged. The preparation method has the advantages of simple steps, easy operation, and easily controlled reaction conditions, and thus the stable properties of solid electrolyte can be guaranteed.

Description

technical field [0001] The invention relates to a solid electrolyte for a hydrogen determination probe and a preparation method thereof, and specifically belongs to the technical field of the electrolyte for a hydrogen determination probe. Background technique [0002] Aluminum and aluminum alloy castings are prone to defects such as pores and inclusions, which greatly reduce their internal quality. The liquid quality of aluminum and its alloys directly affects the quality of castings. The scrap rate due to excessive hydrogen content accounts for about half of all aluminum casting scrap. When aluminum and its alloys are solidified, many defects such as mechanical properties and internal quality are greatly reduced due to hydrogen content. Hydrogen in aluminum not only causes macroscopic defects, but also affects the structure of the structure. For strength, fatigue, toughness, corrosion resistance, anodic oxidation, etc. A series of performances are affected. Therefore, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/411
CPCG01N27/4114
Inventor 康雪侯剑峰王常珍
Owner NORTHEASTERN UNIV LIAONING
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