Coating for phosphorus determination sensor auxiliary electrode and preparation method thereof

A technology of auxiliary electrodes and sensors, applied in the direction of alkali metal silicate coatings, coatings, etc.

Active Publication Date: 2015-08-19
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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Ethanol 38~40wt%;

[0039] Triethanolamine 0.5~0.7wt%;

[0040] Butyl benzyl phthalate 0.5~0.7wt%;

[0041] Water glass 4~6wt%;

[0042] Polyvinyl butyral 0.5~0.7wt%;

[0043] Phosphorus pentoxide and calcium tetroxide powder 26~29wt%;

[0044] Calcium oxide powder 13~17wt%;

[0045] Calcium fluoride powder 13~17wt%.

[0046] 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 15-18 minutes to obtain a premix; then add phosphorus pentoxide to the premix Combine calcium tetroxide powder, calcium oxide powder and calcium fluoride powder, 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 phthalate were added to the slurry II, and ball milled for 8-10 hours to prepare the coating for the auxiliary electrode o...

Embodiment 2

[0053] Ethanol 36~38wt%;

[0054] Triethanolamine 0.6~0.8wt%;

[0055] Butyl benzyl phthalate 0.6~0.8wt%;

[0056] Water glass 4.8~6.8wt%;

[0057] Polyvinyl butyral 0.6~0.8wt%;

[0058] Phosphorus pentoxide and calcium tetroxide powder 26.4~29.4wt%;

[0059] Calcium oxide powder 13.4~17.4wt%;

[0060] Calcium fluoride powder 13.4~17.4wt%.

[0061] 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 18-22 minutes to obtain a premix; then add phosphorus pentoxide to the premix Combine calcium tetroxide powder, calcium oxide powder and calcium fluoride powder, 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 were added to the slurry II, and ball milled for 10-12 hours to prepare the coating for the aux...

Embodiment 3

[0068] Ethanol 34~36wt%;

[0069] Triethanolamine 0.7~0.9wt%;

[0070] Butyl benzyl phthalate 0.7~0.9wt%;

[0071] Water glass 5.4~7.4wt%;

[0072] Polyvinyl butyral 0.7~0.9wt%;

[0073] Phosphorus pentoxide and calcium tetroxide powder 26.7~29.7wt%;

[0074] Calcium oxide powder 13.7~17.7wt%;

[0075] Calcium fluoride powder 13.7~17.7wt%.

[0076] 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 phosphorus pentoxide to the premix Combine calcium tetroxide powder, calcium oxide powder and calcium fluoride powder, and ball mill 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 added to the slurry II, and ball milled for 12-14 hours to prepare the coating for the ...

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Abstract

The invention discloses a coating for a phosphorus determination sensor auxiliary electrode and a preparation method thereof. The coating for the phosphorus 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%, phosphorus pentoxide powder 26-30%, calcium oxide powder 13-18% and calcium fluoride powder 13-18%. 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 phosphorus pentoxide powder, the calcium oxide 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 phosphorus determination sensor auxiliary electrode. The preparation method is simple, and the prepared coating for the phosphorus 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 an auxiliary electrode of a phosphorus-fixing sensor and a preparation method thereof. Background technique [0002] The phosphorus determination sensor for metallurgy can quickly and accurately measure the phosphorus content of molten iron or molten 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 phosphorus-fixing 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 coating of the phosphorus-fixing sensor cannot fully contact the melt to be measured, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D1/04
Inventor 陈影谢光远张子豪巩俐杜聪
Owner WUHAN UNIV OF SCI & TECH
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