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Reference electrode powder for molten metal oxygen-measuring batteries and production process

A technology of reference electrode, molten metal, applied in the field of electronic sensors

Active Publication Date: 2014-02-19
ZHONGXIANG ZHONGYUAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor conductivity, long response time and poor stability of the reference electrode material of the current metal molten oxygen cell, and to provide a The scientific preparation process and reasonable formula greatly improve the conductivity of the reference electrode material, shorten the response time and enhance the stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Electrode powder and preparation process of reference electrode with fixed oxygen and high oxygen in molten iron

[0014] A. Put chromium sesquioxide and ferric oxide into a corundum crucible, then place in an atmosphere furnace, pass through oxygen and heat to 1200°C, and calcined for 3 hours; c. Pulverization: pulverize the above calcined materials, and then Use a planetary ball mill to reach a fineness of 30 nanometers to prepare oxide powder ； d. Select metal chromium powder with a fineness of 100 mesh and put it into a corundum crucible, then place it in an atmosphere furnace, pass hydrogen gas and heat to 1200°C, and calcined for 3 hours to obtain metal chromium powder; e. The above-mentioned calcined The ratio by weight of the oxide powder to the calcined metal chromium powder is: 85% chromium powder, 10% chromium trioxide powder, and 5% iron sesquioxide powder. Just mix well.

[0015]

Embodiment 2

[0016] Example 2: Molten Steel Oxygenation and Low Oxygen Reference Electrode Powder and Preparation Process

[0017] a. Put chromium sesquioxide and ferric oxide into a corundum crucible, then place it in an atmosphere furnace, pass through oxygen and heat it to 1200°C, and calcinate for 3 hours; c. Pulverization: pulverize the above calcined materials, and then Use a planetary ball mill to reach a fineness of 30 nanometers to prepare oxide powder ； d. Select metal chromium powder with a fineness of 100 mesh, put it into a corundum crucible, then place it in an atmosphere furnace, pass hydrogen and heat to 1200 ° C, and calcined for 3 hours to obtain metal chromium powder; e. The ratio by weight of the calcined oxide powder to the calcined metal chromium powder is: chromium powder 80, dichromium sesquioxide powder 5, ferric oxide powder 15. Mix evenly.

Embodiment 3

[0018] Example 3: Copper Water Oxygen Reference Electrode Powder and Preparation Process

[0019] a. Put copper oxide powder and manganese dioxide powder into a corundum crucible, then put it in an atmosphere furnace, pass oxygen and heat to 1000°C, and calcined for 3 hours; c. Crush: crush the above calcined materials, and then use Planetary mill ball milling reaches 30 nanometer fineness to produce oxide powder ； d. Select metal chromium powder with a fineness of 100 mesh, put it into a corundum crucible, then place it in an atmosphere furnace, pass hydrogen and heat to 1200 ° C, and calcined for 3 hours to obtain metal chromium powder; e. The ratio by weight of the calcined oxide powder to the calcined metal chromium powder is: chromium powder 80, copper oxide powder 15, manganese dioxide powder 5. Mix evenly.

[0020] Put the reference electrode powder prepared by this patent into the zirconia tube, insert the molybdenum needle, and use high

[0021] The oxygen-fixing ...

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Abstract

The invention discloses reference electrode powder for molten metal oxygen-measuring batteries and a production process. The reference electrode powder includes, by weight: 60 to 90 parts of chromium powder, 5 to 20 parts of chromium oxide powder and 10 to 30 parts of iron oxide powder. According to the technical scheme, the reference electrode material is adopted with high-quality zirconia tubes, molten metal (molten iron, molten steel, molten copper) oxygen-measuring batteries with excellent performances can be assembled, responding speed of the oxygen-measuring batteries is high, an oxygen electromotive force curve platform appears quickly and smoothly, sampling time is short, and consistence of the oxygen-measuring batteries is good; an oxygen-measuring probe is assembled, and reproducibility during measurement is good.

Description

technical field [0001] The invention relates to the technical field of electronic sensors, in particular to a preparation process of a reference electrode for a molten metal oxygen-fixing battery. Background technique [0002] In the metal smelting process, it is necessary to monitor the oxygen activity or oxygen concentration in the molten metal online. So as to precisely control the alloying process. The principle of the oxygen-fixing battery is to use the oxygen electromotive force on both sides of the electrode if there is a difference in oxygen concentration between the two sides of the zirconia solid electrolyte. Therefore, it is also called an oxygen concentration difference battery. Among them, the reference electrode material in the zirconia tube produces a stable oxygen concentration at high temperature and forms a certain concentration difference with the oxygen concentration in the outer metal melt, and the oxygen-fixing battery generates oxygen electromotive f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C22C27/06C22C32/00G01N27/30
Inventor 潘晓光杨明江
Owner ZHONGXIANG ZHONGYUAN ELECTRONICS
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