High-weather-resistance ceramic diaphragm tube and preparation method thereof

A technology of ceramic diaphragm and high weather resistance, applied in the field of ceramic diaphragm, can solve the problems of easy damage of ceramic diaphragm tube, lack of isolation effect, structural disintegration, etc., to increase the ability to resist disintegration, increase the strength, and improve the dispersing ability. Effect

Pending Publication Date: 2022-04-01
铜陵华兴精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The electrolysis unit needs to be overhauled every six months, mainly because the ceramic diaphragm tube in it is easily damaged
During the use of the electrolysis device, the ceramic diaphragm tube is immersed in the electrolyte and dilute sulfuric acid solution. After a long time, the ordinary ceramic diaphragm tube will cause the structure to disintegrate due to corrosion, and the isolation effect will not be achieved. The ceramic diaphragm needs to be regularly cleaned. Tube for repair and replacement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepared by sol-gel method (Ba 0.7 Ca 0.3 ) ZrO 3 powder, comprising the steps of:

[0023] Step 1: Add 25 mL of glacial acetic acid to the flask, then add 0.025 mol of zirconyl nitrate and 0.075 mol of tetrabutyl zirconate, stir magnetically for 15 minutes, add 45 mL of absolute ethanol to the flask, and continue stirring for 20 minutes to obtain solution A;

[0024] Step 2: Add 80 mL of acetic acid solution with a mass fraction of 30% to the flask, accurately weigh 0.07 mol of barium acetate and 0.03 mol of calcium acetate into the flask containing the acetic acid solution, and magnetically stir at room temperature for 15 minutes to obtain solution B;

[0025] Step 3: Slowly add solution B to solution A under constant stirring, continue stirring for 40 minutes after the dropwise addition is completed, wait for the mixed liquid to turn white and let it stand for 6 hours, and ventilate and dry at 65°C to obtain a gel block; The gel block was calcined at 800°C for 6h,...

Embodiment 2

[0027] Prepared by sol-gel method (Ba 0.7 Ca 0.3 )ZrO 3 powder, comprising the steps of:

[0028] Step 1: Add 25 mL of glacial acetic acid to the flask, then add 0.025 mol of zirconyl nitrate and 0.075 mol of tetrabutyl zirconate, stir magnetically for 20 minutes, add 45 mL of absolute ethanol to the flask, and continue stirring for 20 minutes to obtain solution A;

[0029] Step 2: Add 80 mL of acetic acid solution with a mass fraction of 30% to the flask, accurately weigh 0.07 mol of barium acetate and 0.03 mol of calcium acetate into the flask containing the acetic acid solution, and stir magnetically at room temperature for 20 minutes to obtain solution B;

[0030] Step 3: Slowly add solution B to solution A under constant stirring, continue to stir for 50 minutes after the dropwise addition, wait for the mixed liquid to turn white and let it stand for 6 hours, and ventilate and dry at 65°C to obtain a gel block; The gel block was calcined at 850° C. for 5.5 h, and the c...

Embodiment 3

[0032] Prepared by sol-gel method (Ba 0.7 Ca 0.3 )ZrO 3 powder, comprising the steps of:

[0033] Step 1: Add 25 mL of glacial acetic acid to the flask, then add 0.025 mol of zirconyl nitrate and 0.075 mol of tetrabutyl zirconate, stir magnetically for 30 minutes, add 45 mL of absolute ethanol to the flask, and continue stirring for 20 minutes to obtain solution A;

[0034] Step 2: Add 80 mL of acetic acid solution with a mass fraction of 30% to the flask, accurately weigh 0.07 mol of barium acetate and 0.03 mol of calcium acetate into the flask containing the acetic acid solution, and stir magnetically at room temperature for 30 minutes to obtain solution B;

[0035]Step 3: Slowly add solution B to solution A under constant stirring, continue to stir for 60 minutes after the dropwise addition, wait for the mixed liquid to turn white and let it stand for 6 hours, and ventilate and dry at 65°C to obtain a gel block; The gel block was calcined at 900°C for 5h, and the calcine...

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PUM

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Abstract

The invention discloses a high-weather-resistance ceramic diaphragm tube and a preparation method thereof, and belongs to the technical field of ceramic diaphragms, (Ba0. 7Ca0. 3) ZrO3 powder is of a perovskite structure in a cubic phase form, and has ferroelectricity when the temperature is lower than the Curie temperature; in the subsequent steps, the (Ba0. 7Ca0. 3) ZrO3 powder and other raw materials are mixed to prepare mixed powder, then a mold is filled with the mixed powder to prepare a green body, the ceramic is generated in the high-temperature sintering process, phase change occurs to crystal grains in the (Ba0. 7Ca0. 3) ZrO3 powder, the symmetry of the crystal structure is improved, and the crystal grains are reformed after the (Ba0. 7Ca0. 3) ZrO3 powder and the raw materials such as SiC powder and Al2O3 powder are sintered; compared with common aluminum oxide ceramic, the ceramic diaphragm tube is more compact and regular and has better corrosion resistance, meanwhile, ferroelectricity of the raw material (Ba0. 7Ca0. 3) ZrO3 is removed, a good electron blocking function is achieved, and the using effect of the ceramic diaphragm tube in an electrolysis device is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of ceramic diaphragms, and in particular relates to a high-weather-resistant ceramic diaphragm tube and a preparation method thereof. Background technique [0002] Products in the field of fine chemicals such as ammonium persulfate and sodium persulfate are generally finely produced by electrolytic devices, and ceramic diaphragm tubes are important components in electrolytic devices. [0003] The electrolysis unit needs to be overhauled every six months, mainly because the ceramic diaphragm tubes in it are easily damaged. During the use of the electrolysis device, the ceramic diaphragm tube is immersed in the electrolyte and dilute sulfuric acid solution. After a long time, the ordinary ceramic diaphragm tube will cause the structure to disintegrate due to corrosion, and the isolation effect will not be achieved. The ceramic diaphragm needs to be regularly cleaned. Tubes are repaired and replaced. During t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/48C04B35/622C04B35/626C04B35/64C04B35/80
Inventor 冯建彬牛俊祥刘明龙
Owner 铜陵华兴精细化工有限公司
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