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Oxygen analysis probe solid electrolyte under high-temperature and low-oxygen condition and preparation method

A solid electrolyte and oxygen-fixing probe technology, which is applied in the field of oxygen-fixing probe preparation, can solve problems such as difficulties and limited improvement in conductivity, and achieve the effects of suppressing abnormal growth, reducing sintering energy consumption and cost

Inactive Publication Date: 2015-03-25
胡永刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These efforts have achieved certain results, but the range of improvement in conductivity is limited, and it will be very difficult to achieve a great improvement at the current level.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Oxygen probe solid electrolyte (ZrO 2 ) 0.927 (Yb 2 o 3 ) 0.04 (Al 2 o 3 ) 0.003 (MgO) 0.015 (CaO) 0.015 preparation, the specific steps are as follows:

[0024] Characterized by chemical composition (ZrO 2 ) 0.927 -(Yb 2 o 3 ) 0.04 -(Al 2 o 3 ) 0.003 -(MgO) 0.015 -(CaO) 0.015 Weigh 4 parts by mass of Yb with a median diameter of 1 μm 2 o 3 Powder, 0.3 parts by mass of Al with a median diameter of 1 μm 2 o 3 Powder, 1.5 parts by mass of MgO powder with a median diameter of 5 μm, 1.5 parts by mass of CaO powder with a median diameter of 3 μm, and 92.7 parts by mass of ZrO with a median diameter of 3 μm 2 Powder, add 10vol% PVA aqueous solution binder (the addition amount of binder is 1 part by mass), use a mechanical mixing table to make it uniform, dry press molding, the molding pressure is 100Mpa, and the temperature is raised to 1600 at a heating rate of 3°C / min. ℃, sintered at 1600℃ for 3h, then heat treated at 1200℃ for 2h, and cooled to obtai...

Embodiment 2

[0026] Oxygen probe solid electrolyte (ZrO 2 ) 0.903 (Yb 2 o 3 ) 0.055 (Al 2 o 3 ) 0.01 (MgO) 0.02 (CaO) 0.012 preparation, the specific steps are as follows:

[0027] Characterized by chemical composition (ZrO 2 ) 0.903 -(Yb 2 o 3 ) 0.055 -(Al 2 o 3 ) 0.01 -(MgO) 0.02 -(CaO) 0.012 Weigh 5.5 parts by mass of Yb with a median diameter of 1 μm 2 o 3 Powder, 1 part by mass of Al with a median diameter of 1 μm 2 o 3 Powder, 2 parts by mass of MgO powder with a median diameter of 5 μm, 1.2 parts by mass of CaO powder with a median diameter of 3 μm, and 90.3 parts by mass of ZrO with a median diameter of 3 μm 2 Powder, add 10vol% PVA aqueous solution binder (the addition amount of binder is 3 parts by mass), use mechanical mixing, dry press molding, the molding pressure is 300Mpa, and the temperature is raised to 1650°C at a heating rate of 6°C / min , sintered at 1650°C for 2h, then heat-treated at 1150°C for 2h, and cooled to obtain a solid electrolyte (ZrO 2...

Embodiment 3

[0029] Oxygen probe solid electrolyte (ZrO 2 ) 0.925 (Yb 2 o 3 ) 0.05 (Al 2 o 3 ) 0.007 (MgO) 0.01 (CaO) 0.008 preparation, the specific steps are as follows:

[0030] Characterized by chemical composition (ZrO 2 ) 0.925 -(Yb 2 o 3 ) 0.05 -(Al 2 o 3 ) 0.007 -(MgO) 0.01 -(CaO) 0.008 Weigh 5 parts by mass of Yb with a median diameter of 1 μm 2 o 3 Powder, 0.7 parts by mass of Al with a median diameter of 1 μm 2 o 3 Powder, 1 part by mass of MgO powder with a median diameter of 5 μm, 0.8 parts by mass of CaO powder with a median diameter of 3 μm, and 92.5 parts by mass of ZrO with a median diameter of 3 μm 2 Powder, add 10vol% PVA aqueous solution binder (the addition amount of binder is 2 parts by mass), use mechanical mixing, dry press molding, the molding pressure is 400Mpa, and the temperature is raised to 1575°C at a heating rate of 10°C / min , sintered at 1575°C for 4h, then heat-treated at 1300°C for 3h, and cooled to obtain a solid electrolyte (ZrO ...

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Abstract

The invention discloses an oxygen analysis probe solid electrolyte under a high-temperature and low-oxygen condition and a preparation method, belonging to the technical field of preparation of an oxygen analysis probe. The oxygen analysis probe solid electrolyte under the high-temperature and low-oxygen condition is a quinary system solid electrolyte (ZrO2)(1-x-y-z-w) (Yb2O3)x(Al2O3)y(MgO)z(CaO)w, wherein x is greater than or equal to 0.04 but less than or equal to 0.055, y is greater than or equal to 0.003 but less than or equal to 0.01, z is greater than or equal to 0.01 but less than or equal to 0.02 and w is greater than or equal to 0.008 but less than or equal to 0.015. According to the preparation method disclosed by the invention, the phase composition proportion in a material is controllably adjusted by converting the compounding proportion of a raw material and adjusting a corresponding thermal treatment system, the sintering energy consumption and cost are greatly lowered in the preparation process, and the obtained solid electrolyte can achieve transient evolution from a room temperature tissue to a high temperature tissue and can be repeatedly used under the condition that the structure of the solid electrolyte is not damaged.

Description

technical field [0001] The invention belongs to the technical field of oxygen-fixing probe preparation, in particular to an oxygen-fixing probe solid electrolyte used under high temperature and low oxygen conditions and a preparation method. Background technique [0002] In the metallurgical process, the oxygen constant probe has been widely used in blast furnace, blast furnace casting bed, converter, electric furnace, secondary refining, continuous casting tundish and other processes. Especially in the production process of ultra-clean steel, it is required that the molten steel contains trace elements S+P+O+H+N≤50ppm, among which O≤10ppm, S≤2ppm, N≤11ppm, P≤10ppm, H≤0.6ppm. The reproducible oxygen determination capability of the existing domestic oxygen determination probes can generally meet the requirements above O ≥ 100ppm. For the measurement of low oxygen content O≤10ppm, no matter the form of the final oxygen-fixing probe is sheet, tubular or needle-shaped, it has a...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 胡永刚肖建中夏风
Owner 胡永刚
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