ZrO2 doped molybdenum electrode and preparation method thereof

A technology of molybdenum electrode and ammonium tetramolybdate, which is applied in the preparation of ZrO2-doped molybdenum electrode and in the field of ZrO2-doped molybdenum electrode, can solve the problems of molybdenum electrode corrosion resistance and high-temperature strength difference, and achieve good corrosion resistance and improved Effect of lifetime, good recrystallization temperature and high temperature strength

Inactive Publication Date: 2015-01-21
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the invention is to provide a kind of ZrO 2 Doped molybdenum electrodes to solve the problems of poor corrosion resistance and high temperature strength of existing molybdenum electrodes

Method used

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  • ZrO2 doped molybdenum electrode and preparation method thereof
  • ZrO2 doped molybdenum electrode and preparation method thereof
  • ZrO2 doped molybdenum electrode and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] The ZrO of this embodiment 2 The doped molybdenum electrode is mainly made of the following raw materials: 40g of ammonium tetramolybdate, 8g of dilute nitric acid, 1.22g of zirconium nitrate, 0.46g of urea, and 0.06g of yttrium nitrate.

[0026] The ZrO of this embodiment 2 The preparation method of doped molybdenum electrode comprises the following steps:

[0027] 1) Take 40g of ammonium tetramolybdate in the autoclave, add 8g of dilute nitric acid with a pH value of 1, so that the filling degree of the autoclave is 80%, tighten the autoclave and place it in a vacuum drying oven Hydrothermal reaction, the temperature is 160°C, the time is 24h, after the reaction, cool down, discard the supernatant, and obtain the precipitate A;

[0028] 2) Take 1.22g of zirconium nitrate, 0.46g of urea and 0.06g of yttrium nitrate in the autoclave, add distilled water to make the filling degree of the autoclave 80%, tighten the autoclave and place it in a vacuum drying oven Carry o...

Embodiment 2

[0037] The ZrO of this embodiment 2 Molybdenum-doped electrodes are mainly made of the following raw materials by weight: 40g of ammonium tetramolybdate, 9g of dilute nitric acid, 6.37g of zirconium nitrate, 2.38g of urea, and 0.35g of yttrium nitrate.

[0038] The ZrO of this embodiment 2 The preparation method of doped molybdenum electrode comprises the following steps:

[0039] 1) Take 40g of ammonium tetramolybdate in the autoclave, add 9g of dilute nitric acid with a pH value of 1, so that the filling degree of the autoclave is 85%, tighten the autoclave and place it in a vacuum drying oven Hydrothermal reaction, the temperature is 180°C, the time is 20h, after the reaction is cooled, the supernatant is discarded, and the precipitate A is obtained;

[0040] 2) Take 6.37g of zirconium nitrate, 2.38g of urea and 0.35g of yttrium nitrate in the autoclave, add distilled water to make the filling degree of the autoclave 80%, tighten the autoclave and place it in a vacuum dry...

Embodiment 3

[0049] The ZrO of this embodiment 2 Molybdenum-doped electrodes are mainly made of the following raw materials: 40g of ammonium tetramolybdate, 10g of dilute nitric acid, 10.95g of zirconium nitrate, 4.08g of urea, and 0.61g of yttrium nitrate.

[0050] The ZrO of this embodiment2 The preparation method of doped molybdenum electrode comprises the following steps:

[0051] 1) Take 40g of ammonium tetramolybdate and put it in the autoclave, add dilute nitric acid with a pH value of 1 to make the filling degree of the autoclave 90%, tighten the autoclave and place it in a vacuum drying oven for water Heat reaction, the temperature is 170°C, the time is 22h, after the reaction is cooled, the supernatant is discarded, and the precipitate A is obtained;

[0052] 2) Take 10.95g of zirconium nitrate, 4.08g of urea and 0.61g of yttrium nitrate in the autoclave, add distilled water to make the filling degree of the autoclave 90%, tighten the autoclave and place it in a vacuum drying ov...

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Abstract

The invention discloses ZrO2 doped molybdenum electrode and a preparation method thereof. The ZrO2 doped molybdenum electrode is mainly prepared from the following raw materials by weight: 40 parts of ammonium tetramolybdate, 8-10 parts of dilute nitric acid, 1-12 parts of zirconium nitrate, 0.4-4.5 parts of urea and 0.05-0.7 part of yttrium nitrate. According to the ZrO2 doped molybdenum electrode provided by the invention, tetragonal zirconia with stable crystal form is obtained by using ammonium tetramolybdate, dilute nitric acid, zirconium nitrate and urea as raw materials and adding yttrium oxide as a stabilizer; the problem of changes of zirconia with temperature is overcome; the service life of a molybdenum electrode is prolonged; the obtained ZrO2 doped molybdenum electrode keeps relatively high conductivity, has good recrystallization temperature and high temperature strength, has good corrosion resistance, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of molybdenum electrodes, in particular to a ZrO 2 Molybdenum doped electrodes, also involving a ZrO 2 Preparation method of doped molybdenum electrode. Background technique [0002] Due to its high melting point (2630°C), good electrical and thermal conductivity, small expansion coefficient, high temperature strength and good glass corrosion resistance, molybdenum has been widely used as electrode materials for molten optical glass, glass fiber, and refractory rock wool for many years. . In the past ten years, the demand for high-strength, high-rigidity refractory glass and high-quality foam glass with special properties has developed by leaps and bounds, which also puts forward higher requirements for the high-temperature performance and corrosion resistance of molybdenum electrodes. However, the development of domestic molybdenum electrodes is slow, mainly pure molybdenum electrodes and TZM electrodes....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 魏世忠张国赏崔超鹏郭松亮徐流杰李继文刘伟徐锐周玉成朱向炜
Owner HENAN UNIV OF SCI & TECH
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