Process for coating silver on hollow glass micropearl surface and silver coated hollow glass micropearl thereof

A hollow glass microsphere and silver-plated technology, which is applied in the field of hollow glass microspheres, can solve the problems of limited application range, difficult operation, and high equipment requirements

Inactive Publication Date: 2006-06-28
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to further improve its application performance, people have carried out research on the surface metallization of hollow glass microspheres. There are many surface metallization techniques commonly used, including physical vapor deposition, chemical vapor deposition, vacuum sputtering, ion plating and other methods, but These methods require high equipment and are difficult to operate, which limits their application range.

Method used

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  • Process for coating silver on hollow glass micropearl surface and silver coated hollow glass micropearl thereof
  • Process for coating silver on hollow glass micropearl surface and silver coated hollow glass micropearl thereof
  • Process for coating silver on hollow glass micropearl surface and silver coated hollow glass micropearl thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Example (refer to figure 1 , 5 ):

[0027] The particle size of the hollow glass microspheres used in this part of the examples is 200 orders;

[0028] The method for cleaning the hollow glass microspheres in step a is to immerse the hollow glass microspheres in the organic solvent ethanol for ultrasonic cleaning;

[0029] The sensitizing solution for impregnating hollow glass microspheres in step b is 5% SnCl 2 2H 2 O+1%HCl, the activation solution for its surface activation treatment is 0.1%AgNO 3 + moderate amount of NH 3 ·H 2 O;

[0030]

Composition of oxidizing solution

Composition of reducing solution

Silver Nitrate / Glass Microspheres

mass ratio

stirring speed

/ r.min -1

when reacting

Room / min

Example one

AgNO 3 : 0.010g / ml

NaOH: 0.015g / ml

NH 4 OH amount

Glucose 0.035g / ml

Tartaric acid 0.0030g / ml

Ethanol 7ml / ml

0.08

100

...

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PUM

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Abstract

A process for chemically plating Ag on the surface of hollow glass micro-bead includes such steps as sensitizing and activating its surface and plating Ag by in-situ chemical deposition. Its product is composed of hollow glass micro-bead as core, activated layer and Ag layer has lower infrared emissivity and a certain radar wave absorpitivity.

Description

technical field [0001] The invention relates to a material for absorbing electromagnetic waves, in particular to a hollow glass microsphere whose outer surface is covered with a metallized layer for absorbing infrared waves. Background technique [0002] Metal fillers are widely used in thermal infrared invisible coatings, but the specificity of metal fillers limits its application. Hollow glass microspheres are mostly off-white (and occasionally gray and tan) hollow glass spheres with small particle size (powder-like by naked eye), large surface curvature, and good chemical stability. After the surface of the hollow glass microsphere is modified by metallization, it is equivalent to a metal microsphere. It not only has the characteristics of metal powder, but also has the advantages of light weight. Therefore, the metallized surface of hollow glass microspheres can replace metal powder and be used in the fields of building materials, plastics, rubber, infrared invisible co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/06
Inventor 杜军陶长元唐金晶刘作华曹渊
Owner CHONGQING UNIV
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