Preparation method of rare earth oxide doped alumina-based high-performance metal melt hydrogen determination probe material

A technology of rare earth oxides and substrates, applied in the field of electrochemistry and analysis and detection, can solve problems such as instability and inability to apply hydrogen content measurement, and achieve high strength, good chemical stability and thermal stability, and high proton migration number Effect

Active Publication Date: 2016-10-26
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology

However, due to the dopant In used in the synthetic probe material 2 o 3 Unstable, easy to decompose at high temperature, In 2 o 3 (s) →In 2 o (g) + O 2(g) , so the hydrogen content measurement probe assembled with the proton conductive solid electrolyte obviously cannot be applied to the hydrogen content measurement in molten copper and molten steel at higher operating temperatures

Method used

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  • Preparation method of rare earth oxide doped alumina-based high-performance metal melt hydrogen determination probe material
  • Preparation method of rare earth oxide doped alumina-based high-performance metal melt hydrogen determination probe material
  • Preparation method of rare earth oxide doped alumina-based high-performance metal melt hydrogen determination probe material

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Roughly weigh a certain mass of analytically pure Al 2 o 3 and Yb 2 o 3 , respectively placed in clean zirconia crucibles, covered with a crucible lid, placed in a muffle furnace, set the heating rate at 5°C / min, and baked at 500°C for 8h to dry the medicine.

[0049] Al by molar ratio 2 o 3 : Yb 2 o 3 =1.999:0.001 ratio, take a proper amount of dried powder, mix them into a ball mill tank, add absolute ethanol, and prepare a slurry with a solid content of 20-30wt%, using alumina grinding balls, balls The mass ratio is 2:1, the mass ratio of large balls, medium balls and small balls is 3:4:3, using a planetary ball mill, set the speed at 300r / min, and ball milled for 96h, then transfer the slurry to an evaporating dish, and Put it in an explosion-proof constant temperature oven and dry it at 200°C to get blocky powder. After rough grinding in agate mortar, sieve with 200-mesh standard sieve to get pre-ground powder.

[0050] The above-mentioned pre-grinded powde...

Embodiment 2

[0056] Roughly weigh a certain mass of analytically pure Al 2 o 3 and Pr 2 o 3 , respectively placed in clean zirconia crucibles, covered with a crucible lid, placed in a muffle furnace, set the heating rate at 5°C / min, and baked at 600°C for 7h to dry the medicine.

[0057] Al by molar ratio 2 o 3 : Pr 2 o 3 =1.997:0.003 ratio, respectively take an appropriate amount of the above-mentioned dried powders, mix them into a ball mill tank, add a certain amount of absolute ethanol, and prepare a slurry with a solid content of 20-30 wt %. Aluminum grinding balls, the mass ratio of balls to materials is 2:1, the mass ratio of large balls, medium balls and small balls is 3:4:3, a planetary ball mill is used, the speed is set at 350r / min, ball milling is 72h, and then the slurry is The material was transferred to an evaporating dish, and dried in an explosion-proof constant temperature oven at 200°C to obtain block powder, which was coarsely ground in an agate mortar and sieved...

Embodiment 3

[0064] Roughly weigh a certain mass of analytically pure Al 2 o 3 and Sm 2 o 3 , respectively placed in clean zirconia crucibles, covered with a crucible lid, placed in a muffle furnace, set the heating rate at 5°C / min, and baked at 700°C for 6h to dry the medicine.

[0065] Al by molar ratio 2 o 3 : Sm 2 o 3 =1.99:0.01 ratio, take an appropriate amount of the above-mentioned dried powders, mix them into a ball mill tank, add a certain amount of absolute ethanol, and prepare a slurry with a solid content of 20-30 wt %. Aluminum grinding balls, the mass ratio of balls to materials is 2:1, the mass ratio of large balls, medium balls and small balls is 3:4:3, using a planetary ball mill, set the speed at 400r / min, ball milled for 48h, and then the slurry The material was transferred to an evaporating dish, and dried in an explosion-proof constant temperature oven at 200°C to obtain block powder, which was coarsely ground in an agate mortar and sieved with a 200-mesh standa...

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Abstract

The invention relates to a preparation method of a rare earth oxide doped alumina-based high-performance metal melt hydrogen determination probe material. Common ball milling and high-performance sand grinding are combined for preparing powder, and an optimized solid-phase synthesis method is adopted for preparing Al2-xRExO3-alpha proton conductive solid electrolyte by secondary sintering. Particularly, analytically pure Al2O3 and RE2O3 are taken as raw materials to prepare the proton conductive solid electrolyte according to a technical scheme including drying, mixing, pregrinding, performing, presintering, grinding, final grinding, final forming and final sintering. The electrolyte has a compact structure and is high in proton conductivity, high in high temperature stability and chemical stability and excellent mechanical strength and corrosion resistance, and the raw materials are low in cost relatively. By application of the electrolyte to the continuous online metal melt hydrogen determination probe material, the problem that an existing probe material which is poor in high temperature stability cannot be applied to high-melting-point melted copper and melted steel hydrogen content determination can be solved.

Description

technical field [0001] The invention relates to a preparation method of a rare earth oxide-doped alumina-based high-performance metal melt hydrogen determination probe material, which belongs to the field of electrochemistry and analysis and detection. Background technique [0002] Traditional metal materials such as copper, iron and aluminum have good mechanical, mechanical and electrical properties, and are widely used in the fields of national economic construction and national defense construction. The mechanical and mechanical properties of these metal materials such as strength, hardness, plasticity and toughness are closely related to the smelting process of the material itself. Hydrogen, as a harmful element, must be strictly controlled during the smelting process of the above metal materials. Hydrogen in metal materials is generally brought in by water vapor in furnace gas, raw materials containing moisture and refractory materials during the smelting process. Hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/626C04B35/64G01N27/02G01N27/26
CPCC04B35/10C04B35/62615C04B35/6262C04B35/64C04B2235/3224C04B2235/60C04B2235/604C04B2235/94C04B2235/96G01N27/026G01N27/26
Inventor 阮飞包金小谢敏王威威贾桂霄周芬郜建全宋希文
Owner INNER MONGOLIA UNIV OF SCI & TECH
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