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Method for preparing conductive hollow glass microspheres

The technology of hollow glass microbeads and activation solution is applied in the field of preparation of hollow glass microbeads. Good, good conductivity, low density effect

Inactive Publication Date: 2010-05-12
CHINA TRIUMPH INT ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically speaking, metal materials are excellent electromagnetic wave loss materials, but the anti-oxidation and acid and alkali resistance of metal micropowders are poor; the dielectric constant is large and the spectral characteristics are poor; the density is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 500g of hollow glass microspheres, prepare 10,000ml of degreasing solution according to the ratio of sodium hydroxide 32g / L, sodium phosphate 45g / L, and sodium carbonate 42g / L, put it in and stir for 10 minutes, filter and wash with water 3 times until the pH value It can be 7 and dried for later use.

[0029] Then configure the acid etching solution according to the volume ratio of hydrofluoric acid to water 1:10, put the dried hollow glass microspheres into the acid etching solution for 1 minute, filter them out with a filter, and then wash them in a water tank for 3 Repeat until the pH value is 7. Remove with a strainer and dry for later use.

[0030] Configuration activation solution, nickel sulfate and sodium hypophosphite, its total concentration is 2.5mol / L, wherein the molar ratio of nickel sulfate and sodium hypophosphite is 1:4; the pH value of activation solution is 7~7.4. Soak the microbeads in the activation solution for 25-30 minutes, then raise the...

example 2

[0033] Take 500g of hollow glass microspheres, prepare 10,000ml of degreasing solution according to the ratio of sodium hydroxide 30g / L, sodium phosphate 40g / L, and sodium carbonate 40g / L, put it in and stir for 15 minutes, filter and wash with water 3 times until the pH value It can be 7 and dried for later use.

[0034] Then configure the acid etching solution according to the volume ratio of hydrofluoric acid to water 1:10, put the dried hollow glass microspheres into the acid etching solution for 1 minute, filter them out with a filter, and then wash them in a water tank for 3 Repeat until the pH value is 7. Remove with a strainer and dry for later use.

[0035] Configuration activation solution, nickel sulfate and sodium hypophosphite, its total concentration is 2.5mol / L, wherein the molar ratio of nickel sulfate and sodium hypophosphite is 1:4; Add polyacrylamide thickener, the pH value of activation solution 7 to 7.4. Soak the hollow glass microspheres in the activat...

example 3

[0038] Take 500g of hollow glass microspheres, prepare 10,000ml of degreasing solution according to the ratio of sodium hydroxide 30g / L, sodium phosphate 40g / L, and sodium carbonate 40g / L, put it in and stir for 12 minutes, filter and wash with water 3 times until the pH value It can be 7 and dried for later use.

[0039] Then configure the acid etching solution according to the volume ratio of hydrofluoric acid to water 1:10, put the dried hollow glass microspheres into the acid etching solution for 1 minute, filter them out with a filter, and then wash them in a water tank for 3 Repeat until the pH value is 7. Remove with a strainer and dry for later use.

[0040] Configure the activation solution, nickel sulfate and sodium hypophosphite, the total concentration is 2.5mol / L, wherein the molar ratio of nickel sulfate and sodium hypophosphite is 1:4; the pH value of the activation solution is 7-7.4. Soak the hollow glass microspheres in the activation solution and use ultras...

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PUM

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Abstract

The invention relates to a method for preparing conductive hollow glass microspheres. The method comprises the following steps: (1) adding the hollow glass microspheres into cleaning liquid to be stirred and cleaned until the pH valve of the cleaning liquid is 7, and then taking the hollow glass microspheres out and drying; (2) putting the dried hollow glass microspheres in pickling solution for treatment for 1 minute, and then taking out the hollow glass microspheres for washing for 3 times until the pH valve of the washing liquid is 7; (3) putting the hollow glass microspheres into activating solution to be soaked for 2-30 minutes, and simultaneously, raising the temperature of the activating solution to 175 DEG C for thermal oxidation-reduction reaction lasting for 50 minutes; (4) putting the hollow glass microspheres into a plating bath including nickel sulfate and sodium hypophosphite for plating for 40-90 minutes, and controlling the plating temperature between 85 DEG C and 88 DEG C; and (5) taking out the hollow glass microspheres, and then washing and drying. The prepared conductive hollow glass microspheres are light in weight, high in strength, corrosion resistant and are suitable for military facilities or civil indoor and outdoor shielding materials. The method has the advantages of continuous production, low cost, superior performance and stable quality.

Description

Technical field: [0001] The invention relates to a method for preparing hollow glass microspheres, in particular to a method for preparing conductive hollow glass microspheres used for coating electronic shielding materials. Background technique: [0002] Electromagnetic wave radiation has become another major public hazard after noise pollution, air pollution, water pollution, and solid waste pollution. At present, the main method to prevent electromagnetic wave interference is to use electromagnetic wave shielding materials and electromagnetic wave absorbing materials. Shielding is the electromagnetic isolation of the inner and outer spaces with the closed surface of the conductive or magnetic conductor. The electromagnetic energy transmitted from one side of the space to the other side is suppressed to a very small amount due to the implementation of shielding. Electromagnetic wave absorption is to reduce the reflected energy of electromagnetic waves, that is, to convert...

Claims

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Application Information

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IPC IPC(8): C03C17/10
Inventor 彭寿王芸王华文彭程倪嘉彭小波鲍田
Owner CHINA TRIUMPH INT ENG
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