Modified zirconium silver-carrying powder and preparation method thereof

A technology of zirconium phosphate-supported silver and powder, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc. The effect of dissolution or oxidation, simple process and excellent product quality

Inactive Publication Date: 2005-07-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects that the layered zirconium phosphate silver-loaded powder is easy to turn black when kept in the air for a long time, and will change color when the resin is mixed, so as to provide a kind of powder that can be stored in the air for a long time or mixed with the resin. Non-discoloration modified zirconium phosphate silver-loaded powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Disperse 100g of silver-loaded zirconium phosphate powder (average particle size 12μm) with a silver content of 3.5wt% in 500ml of water, add ammonium carbonate, adjust the pH to ≈8, and add 15g of ZnCl 2 Reagent, the precipitate was obtained, filtered, washed, dried, and mixed with 1.6g B in a mortar 2 o 3 After the reagents are mixed evenly, put them in Al 2 o 3 In a crucible, put it into a high-temperature electric furnace, in a mixed atmosphere of nitrogen and oxygen (oxygen volume content 30%), roast at 850°C for 2h, and cool naturally to room temperature to obtain a modified zirconium phosphate silver-loaded powder with an average particle size of 16 μm.

Embodiment 2

[0025] Mix 8.7 g of MgO reagent (average particle size 38 μm) in 100 g of silver-loaded zirconium phosphate powder (average particle size 6.2 μm) with a silver content of 9.0%, and add 20 wt % boric acid aqueous solution 25 ml dropwise when mixing in a mortar or mixer. After mixing well, put it in Al 2 o 3 The crucible was put into a high-temperature electric furnace, baked at 950°C for 3 hours in an air atmosphere, and cooled naturally to room temperature to obtain a modified silver-supported zirconium phosphate powder with an average particle size of 45 μm.

Embodiment 3

[0027] After fully mixing 9.2g of silver-loaded zirconium phosphate powder (average particle size: 3.0 μm) with a silver content of 3.0% and 0.8 g of commercially available ZnO (average particle size: 38 μm), fully mix it with 0.1 g of commercially available boric acid, and place in al 2 o 3 In a crucible, put it into a high-temperature electric furnace, in a mixed atmosphere of Ar and oxygen (oxygen content 10%), bake at 800°C for 5h, and cool naturally to room temperature to obtain a modified zirconium phosphate silver-loaded powder with an average particle size of 42 μm.

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Abstract

The modified silver-carrying zirconium phosphate powder is prepared through the process of mixing silver-carrying zirconium phosphate powder with crystallization promoter in the amount of 3-20 wt% of the zirconium phosphate powder, and roasting at 800-1100 deg.c inside atmosphere with oxygen content over 5 vol% for 1-5 hr. The crystallization promoter is mixture of MgO or ZnO or compound capable of producing MgO or ZnO in roasting and B2O3 or compound capable of producing B2O3 in roasting with molar ratio of B2O3 to MgO or ZnO 0-0.3. The modified silver-carrying zirconium phosphate powder may be maintained in the air for long time and has no color change during mixing with resin.

Description

technical field [0001] The invention relates to a modified silver-loaded zirconium phosphate powder and a preparation method thereof. Background technique [0002] When zirconium phosphate (α-Zr(HPO 4 ) 2 ·H 2 O) When used to prepare silver-based antibacterial materials, it is necessary to insert silver-containing ions between its layered structures to obtain layered zirconium phosphate silver-loaded powders, and perform high-temperature treatment. However, the silver in this layered zirconium phosphate silver-loaded powder is easy to dissolve and oxidize, and it is easy to turn black when stored in the air for a long time; Discoloration of the resin. For example, if the layered silver-loaded zirconium phosphate powder obtained after high-temperature treatment at 1000°C for 2 hours is boiled in ethylene glycol with a boiling point of about 200°C or glycerol with a boiling point of about 300°C, the white powder will soon become black. Moreover, the higher the silver con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/00
Inventor 陈运法李自强吴镇江叶树峰谢裕生
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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