Modified zirconium silver-carrying powder and preparation method thereof

A zirconium phosphate-loaded silver and powder technology, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of easy blackening and discoloration of layered zirconium phosphate-loaded silver powder during retention time, and achieve the purpose of inhibiting silver Dissolution or oxidation, simple process, and excellent product quality

Inactive Publication Date: 2006-10-25
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 invention relates to a modified silver-loaded zirconium phosphate powder, which is prepared by the following method: fully mix the silver-loaded zirconium phosphate powder and a crystallization accelerator of 3 to 20 wt% of its weight, and mix it uniformly in a place where the volume content of oxygen is more than 5v%. It is obtained by firing at 800-1100°C for 1-5 hours in an oxygen atmosphere. Described crystallization accelerator is MgO or ZnO or can generate the compound of this oxide compound when roasting, and B 2 o 3 or a mixture of compounds capable of forming this oxide upon firing, B 2 o 3 The molar ratio to MgO or ZnO is 0-0.3. The modified zirconium phosphate silver-loaded powder can be stored in the air for a long time, and does not change color when mixed with resin, which fundamentally improves the problem of discoloration of the zirconium phosphate silver-loaded powder when it is used in industries such as textiles, plastics, and papermaking; and the present invention The preparation method provided has simple procedures, easy industrial production, no by-products and no pollution to the environment. At present, it has been applied in Shanghai, Hunan and other enterprises, and the product quality is excellent.

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 Patents(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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