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Method for promoting preprocessing of copper-clad zirconium tungstate composite powder

A technology of composite powder and zirconium tungstate, applied in the field of pretreatment of powder coating

Inactive Publication Date: 2007-11-07
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its patent does not involve the detailed powder pretreatment method and the composition of the electroless plating solution, but focuses on the preparation of the copper-coated zirconium tungstate powder by the electroless plating method, and after doping with a small amount of ultrafine graphite C powder, the cold Isostatic pressing + microwave sintering process to obtain ZrW 2 o 8 / Cu composite material

Method used

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  • Method for promoting preprocessing of copper-clad zirconium tungstate composite powder
  • Method for promoting preprocessing of copper-clad zirconium tungstate composite powder
  • Method for promoting preprocessing of copper-clad zirconium tungstate composite powder

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: (its sensitization activation solution gets 200ml; Plating solution gets 200ml)

[0031] (1) Coarseness: Weigh the prepared ZrW 2 o 8 For the powder, stir with concentrated nitric acid magnetically while heating for about 30 minutes, wash and dry.

[0032] (2) One-step sensitization and activation: weigh 0.06gPdCl 2 Dissolve in 15ml of hydrochloric acid to obtain solution I, then dissolve 28gNaCl in 100ml of distilled water to obtain solution II, mix solutions I and II to obtain solution III, and then add 6.5g of SnCl 2 Dissolve in 70ml of distilled water to obtain solution IV, add prepared solution III to solution IV, add distilled water to 200ml. Treat 10g of inorganic powder per 100ml of sensitization and activation solution, and the sensitization solution can be reused three times at most, because the Pd ions in the solution are reduced every time the sensitization and activation solution is performed. After 30 minutes of sensitization and activati...

Embodiment 2

[0035] Embodiment 2: (its sensitization activation solution gets 500ml; Plating solution gets 500ml)

[0036] (1) Coarseness: Weigh the prepared ZrW 2 o 8 For the powder, stir with concentrated nitric acid magnetically and heat for about 60 minutes at the same time, then wash and dry.

[0037] (2) One-step sensitization and activation: first weigh 0.2gPdCl 2 Dissolve in hydrochloric acid to obtain solution I, then dissolve 80gNaCl in 250ml distilled water to obtain solution II, mix solutions I and II to obtain solution III, then add 20gSnCl 2 Dissolve in 200ml of distilled water to obtain solution IV, add prepared solution III to solution IV, add distilled water to 500ml. Treat 10g of inorganic powder per 100ml of sensitization and activation solution, and the sensitization solution can be reused three times at most, because the Pd ions in the solution are reduced every time the sensitization and activation solution is performed. After 50 minutes of sensitization and activ...

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Abstract

The present invention relates to powder coating technology, and is especially pre-treatment process for promoting cladding of zirconium tungstate (ZrW2O8) powder with copper. The micron level ZrW2O8 powder is surface roughened, sensitized and activated before it is clad chemically with copper powder under the irradiation of ultrasonic wave. The present invention makes it possible to clad ZrW2O8 powder easily with compact copper layer to prepare composite powder, and has simple technological process and high cladding effect, and the composite powder may be used in be used in producing substrate of SLSI and electronic device.

Description

technical field [0001] The patent of the present invention relates to the pretreatment method of powder coating, especially refers to the method of using one-step sensitization and activation of the surface of zirconium tungstate powder to promote the rapid coating of copper particles on the surface of zirconium tungstate powder of different shapes. Background technique [0002] In recent years, Professor Sleight A.W of Oregon State University [1-4] found a strong "Negative Thermal Expansion" (Negative Thermal Expansion, NTE) effect in tungsten (molybdenum) salt and phosphonate (vanadium) salt, the most important material of which is cubic ZrW 2 o 8 , the material has a strong isotropic negative thermal expansion effect in the temperature range of 0.3 ~ 1050K, and its negative thermal expansion coefficient α ~ -8.7×10 -6 K -1 【1-4】. wxya 2 o 8 This material with excellent NTE performance has many potential application fields [5], so it has attracted extensive attention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/40C23C18/18C22C1/04C22C29/00
Inventor 严学华程晓农王春生邱杰张成华
Owner JIANGSU UNIV
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