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A coating for auxiliary electrodes of silicon-fixed sensors and its preparation method

A technology for auxiliary electrodes and sensors, applied in the direction of alkali metal silicate coatings, coatings, etc., can solve the problems that the stability of auxiliary electrodes cannot be guaranteed, so as to improve the working efficiency of blast furnaces, improve stability, and excellent high-temperature adhesion performance Effect

Active Publication Date: 2017-02-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current research focuses on the selection of the auxiliary electrode itself, while ignoring the problem of various additives for the auxiliary electrode, that is, the problem of adhesion. One important aspect is that the stability of the auxiliary electrode cannot be guaranteed.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] A coating for auxiliary electrodes of silicon-fixed sensors and a preparation method thereof. The composition and the content thereof of the coating used for the auxiliary electrode of silicon-fixed sensor described in this embodiment are:

[0036] Ethanol 35~40wt%;

[0037] Triethanolamine 0.5~0.7wt%;

[0038] Butyl benzyl phthalate 0.5~0.7wt%;

[0039] Water glass 4~6wt%;

[0040] Polyvinyl butyral 0.5~0.7wt%;

[0041] Silica 30~36.5wt%;

[0042] Calcium fluoride powder 20~26.5wt%.

[0043] The preparation method of this embodiment is as follows: according to the composition and content of the paint, first mix ethanol and triethanolamine in a ball mill for 15-18 minutes to obtain a premix. Add silicon dioxide powder and calcium fluoride powder to the premixed material, and ball mill for 8-10 hours to obtain slurry I. Water glass is then added to the slurry I, and ball milled for 4-5 hours to obtain slurry II. Finally, polyvinyl butyral and butyl benzyl phthala...

Embodiment 2

[0049] A coating for auxiliary electrodes of silicon-fixed sensors and a preparation method thereof. The composition and the content thereof of the coating used for the auxiliary electrode of silicon-fixed sensor described in this embodiment are:

[0050] Ethanol 34~39wt%;

[0051] Triethanolamine 0.6~0.8wt%;

[0052] Butyl benzyl phthalate 0.6~0.8wt%;

[0053] Water glass 4.8~6.8wt%;

[0054] Polyvinyl butyral 0.6~0.8wt%;

[0055] Silica 30.5~37wt%;

[0056] Calcium fluoride powder 20.5~27wt%.

[0057] The preparation method of this embodiment is: first mix ethanol and triethanolamine in a ball mill for 18-22 minutes according to the composition and content of the coating to obtain a premix. Add silicon dioxide powder and calcium fluoride powder to the premixed material, and ball mill for 10-12 hours to obtain slurry I. Water glass is then added to the slurry I, and ball milled for 5-6 hours to obtain slurry II. Finally, polyvinyl butyral and butyl benzyl phthalate we...

Embodiment 3

[0063] A coating for auxiliary electrodes of silicon-fixed sensors and a preparation method thereof. The composition and the content thereof of the coating used for the auxiliary electrode of silicon-fixed sensor described in this embodiment are:

[0064] Ethanol 33~38wt%;

[0065] Triethanolamine 0.7~0.9wt%;

[0066] Butyl benzyl phthalate 0.7~0.9wt%;

[0067]Water glass 5.4~7.4wt%;

[0068] Polyvinyl butyral 0.7~0.9wt%;

[0069] Silica 31~37.5wt%;

[0070] Calcium fluoride powder 21~27.5wt%.

[0071] The preparation method of this embodiment is as follows: according to the composition and content of the coating, first mix ethanol and triethanolamine in a ball mill for 22 to 26 minutes to obtain a premix; then add silica powder to the premix 1. Calcium fluoride powder, ball milled for 12-14 hours to obtain slurry I. Water glass is then added to the slurry I, and ball milled for 6-7 hours to obtain slurry II. Finally, polyvinyl butyral and butyl benzyl phthalate were a...

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Abstract

The invention discloses a coating for a silicon determination sensor auxiliary electrode and a preparation method thereof. The coating for the silicon determination sensor auxiliary electrode contains, by weight, ethyl alcohol 32-40%, triethanolamine 0.5-1%, butyl benzyl phthalate 0.5-1%, water glass 4-8%, polyvinyl butyral 0.5-1%, silicon dioxide powder 32-38% and calcium fluoride powder 20-28%. The ethyl alcohol and the triethanolamine are firstly mixed in a ball grinding mill according to the components and contents for 15-30 minutes, the silicon dioxide powder and the calcium fluoride powder are added to perform ball grinding for 8-16 hours, then the water glass is added to perform ball grinding for 4-8 hours, and finally the polyvinyl butyral and the butyl benzyl phthalate are added to perform ball grinding for 8-16 hours so as to obtain the coating for the silicon determination sensor auxiliary electrode. The preparation method is simple, and the prepared coating for the silicon determination sensor auxiliary electrode has the advantages of being high in strength, excellent in high-temperature adhesion performance and good in using effect.

Description

technical field [0001] The invention belongs to the technical field of coatings. In particular, it relates to a coating for auxiliary electrodes of silicon-fixed sensors and a preparation method thereof. Background technique [0002] Silicon determination sensors for metallurgy can quickly and accurately measure the silicon content of molten iron or steel, and perform corresponding process operations based on the detected data, which is of great significance to speed up smelting and improve product quality. However, due to the poor adhesion between the traditional silicon-fixed sensor and the substrate at low and high temperatures, the surface of the auxiliary electrode coating is facing the problem of cracking at low temperature and falling off at high temperature, which makes the solid electrolyte surface coating at high temperature The auxiliary electrode paint of the silicon-fixed sensor cannot fully contact the melt to be measured, the conduction of oxygen ions in the ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D1/04C09D7/12
Inventor 王文长谢光远林寒月赵芃邹航贾晓飞
Owner WUHAN UNIV OF SCI & TECH
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