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Process for preparing nano-grade AgCl powder by semisolid method

A semi-solid method, silver chloride technology, applied in the direction of silver halide, etc., can solve the problems of mutual adhesion of particles, large-scale production of products, agglomeration, etc.

Inactive Publication Date: 2009-01-07
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional solid-state reaction uses pure solid substances as reactants, and adopts a one-time feeding method, which easily leads to a large amount of products being generated in a very short period of time, and particles stick to each other and agglomerate.
There are few reports on the preparation of AgCl powder by semi-solid reaction

Method used

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  • Process for preparing nano-grade AgCl powder by semisolid method
  • Process for preparing nano-grade AgCl powder by semisolid method
  • Process for preparing nano-grade AgCl powder by semisolid method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Prepare 132 grams of AgCl (150 mesh) powder.

[0030] 1) Preparation of dispersant solution: Take about 0.15 grams of dispersant polyethylene glycol 1000 (PEG-1000), dissolve it in 20 milliliters of double-distilled water, dissolve it with ultrasonic vibration, and continue to replenish the solvent to obtain a concentration of 0.003mol / dm3 Dispersant solution 50 ml;

[0031] 2) Get 90 grams of analytically pure potassium chloride (KCI) solids, put them in an agate grinding tank, add agate beads as abrasives, grind for about 2 minutes with a ball mill, add about 8 milliliters of dispersant solution, and continue grinding for 5 minutes. Supplement the dispersant in the wetting of the powder until the potassium chloride in a wet state is obtained. This process requires a total of 8-15 ml of dispersant.

[0032] 3) Take analytically pure silver nitrate (AgNO 3 ) 172 grams of solid, avoid light and grind a little, add in the above-mentioned potassium chloride in...

Embodiment 2

[0036] Example 2: Prepare 63 grams of AgCl (150 mesh) powder.

[0037] 1) Preparation of dispersant solution: Take about 0.3 grams of dispersant polyethylene glycol 400 (PEG-400), dissolve it in 20 milliliters of double-distilled water, dissolve it by ultrasonic vibration, continue to replenish solvent, and obtain a concentration of 0.015mol / dm3 Dispersant solution 50 ml;

[0038] 2) Take 52 grams of analytically pure potassium chloride (KCI) solid, put it in an agate grinding jar, add agate beads as abrasive, grind it with a ball mill for about 2 minutes, add about 2-4 ml of dispersant solution, and continue grinding for 5 minutes , Supplement the dispersant according to the wetting of the powder until the potassium chloride in a wet state is obtained. This process requires about 4-6 ml of dispersant.

[0039] 3) Take analytically pure silver nitrate (AgNO 3 ) 80 grams of solid, avoid light and grind slightly, add in the above-mentioned potassium chloride in 3 times, each t...

Embodiment 3

[0043] Example 3: Prepare 63 grams of AgCl (150 mesh) powder.

[0044] 1) Preparation of the dispersant solution: Take about 0.15 grams of the dispersant polyethylene glycol 300 (PEG-300), dissolve it in 20 milliliters of double-distilled water, dissolve it with ultrasonic vibration, and continue to supplement the solvent to obtain a concentration of 0.01mol / dm3 Dispersant solution 50 ml;

[0045] Subsequent steps are the same as in Example 2.

[0046] The dispersant polyethylene glycols of the above-mentioned three embodiments can also adopt polyethylene glycol 1000 (PEG-1000), polyethylene glycol 600 (PEG-600), polyethylene glycol 400 (PEG-400) or polyethylene glycol Ethylene glycol 300 (PEG-300), etc., can also obtain 150 mesh AgCl solid powder.

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Abstract

The invention relates to a method of preparing a nano-scale silver chloride powder by semi-solid-state method. The method comprises the steps of adopting AgNO3 and KCI as reactants, and adopting sulfonating succinate, polyethylene glycols or fatty alcohol polyethenoxy ether as dispersants, to respectively formulate a sulfonating succinate dispersant solution, a polyethylene glycol dispersant solution or a fatty alcohol polyethenoxy ether dispersant solution; adding any dispersant solution into the reactant KCI before the reaction of the reactant to obtain a reaction material with good moisture dispersion; adding AgNO3 powder to KCI with good moisture dispersion; adding the dispersant solution additionally according to the moistening degree of AgNO3, so as to cause AgNO3 to reach the moistening degree; conducing the in-situ semi-solid-state reaction process under grinding; conducting the procedures of in-situ purification of a product, the drying of the product and the grinding and the shaping of the product to obtain the silver chloride powder. By the method, the yield can be reach up to 91 percent to 95 percent. The prepared silver chloride powders are nano-sclae silver chloride powders which have regular spherical shapes, clear boundary lines among particles, high dispersion state, uniform distribution of particles and average fineness being 50-70nm.

Description

technical field [0001] The invention relates to a method for preparing nanoscale silver chloride (AgCl) powder, in particular to a method for preparing nanoscale silver chloride powder by a semi-solid method. Background technique [0002] Solid-state Ag / AgCl electrodes can be used as sensing electrodes for electric fields in the ocean. Due to the strong attenuation effect of seawater on electric fields, the sensitivity of sensing electrodes is required to be high, and one of the important conditions for obtaining high-sensitivity Ag / AgCl electrodes It is to control the fineness of AgCl powder, one of the main components, which is one of the key technologies to ensure low noise of the electrode. The sufficient contact between Ag powder and AgCl powder, among which improving the fineness of AgCl powder is one of the key technologies to ensure high electrode sensitivity. Because the AgCl powder itself is easy to decompose when exposed to light, it is easy to agglomerate during...

Claims

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Application Information

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IPC IPC(8): C01G5/02
Inventor 宋玉苏张燕陈德斌曹非王向军王源升季斗周立清
Owner NAVAL UNIV OF ENG PLA
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