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Prepn process of composite tin oxide conducting powder with blended antimony and RE

A technology of composite conductive powder and rare earth oxide, which is applied in the direction of tin oxide, oxide conductors, non-metallic conductors, etc., can solve the problem of low service temperature of composite conductive powder, and achieve the effect of increasing the service temperature

Inactive Publication Date: 2006-10-18
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use temperature of the above-mentioned composite conductive powder is relatively low, usually not exceeding 800°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 0.0748g of lanthanum trioxide, 0.0911g of antimony trioxide, 29.6725g of tin powder, and 48g of citric acid into a 1000ml beaker, and add 6mol / L nitric acid solution under constant stirring until a transparent light yellow-green mixture is formed. solution.

[0015] Prepare 450ml of 2mol / L ammonia solution in a 1000ml beaker for use.

[0016] Add 226g of quartz powder (-400 mesh) into a 5000ml beaker, add 2000ml of deionized water, stir at room temperature to form a suspension, and heat to 60°C, add the above mixed solution and Ammonia solution, and control the pH value of the reaction solution at 8 to form a coprecipitate. After the addition, stir for 30 minutes, then cool to room temperature, filter, wash the coprecipitate twice with deionized water, and wash the coprecipitate with absolute ethanol Dry the filter cake at 105°C for 1 hour, grind it, pass through a 200-mesh sieve, and calcinate the sieved powder at 900°C for 2 hours to obtain lanthanum- and antimon...

Embodiment 2

[0018] Add 0.0773g of neodymium trioxide, 0.0911g of antimony trioxide, 29.6725g of tin powder, and 48g of citric acid into a 1000ml beaker, and add 6mol / L nitric acid solution under constant stirring until a transparent light yellow-green mixture is formed. solution.

[0019] Prepare 300ml of 3mol / L ammonia solution in a 1000ml beaker for use.

[0020] Add 17.57g of quartz powder (-400 mesh) to a 2000ml beaker, add 600ml of deionized water, stir at room temperature to form a suspension, and heat to 60°C, add the above mixed solution evenly and dropwise under constant stirring and ammonia solution, and control the pH value of the reaction solution at 8 to form a coprecipitate. After the addition, stir for 30 minutes, then cool to room temperature, filter, wash the coprecipitate twice with deionized water, and wash the coprecipitate with absolute ethanol. Precipitate once, dry the filter cake at 105°C for 1 hour, grind, pass through a 200-mesh sieve, and calcinate the sieved p...

Embodiment 3

[0022] Add 13.7652g of samarium trioxide, 11.5066g of antimony trioxide, 29.6725g of tin powder, and 60g of citric acid into a 1000ml beaker, and add 6mol / L nitric acid solution under constant stirring until a transparent light yellow-green mixture is formed. solution.

[0023] Prepare 300ml of 3mol / L ammonia solution in a 1000ml beaker for use.

[0024] Add 367g of quartz powder (-400 mesh) to a 5000ml beaker, add 3000ml of deionized water, stir at room temperature to form a suspension, and heat to 60°C, add the above mixed solution and Ammonia solution, and control the pH value of the reaction solution at 8 to form a coprecipitate. After the addition, stir for 30 minutes, then cool to room temperature, filter, wash the coprecipitate twice with deionized water, and wash the coprecipitate with absolute ethanol Dry the filter cake at 105°C for 1 hour, grind it, pass through a 200-mesh sieve, and calcinate the sieved powder at 1100°C for 2 hours to obtain a compound of tin oxid...

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Abstract

The preparation process of composite tin oxide conducting powder with blended antimony and RE includes the following steps: 1. compounding mixture solution with RE oxide(s), tin powder, antimony oxide, complexant and nitric acid; 2. compounding alkali solution with ammonia water; 3. dispersing conducting core material in water solution; 4. dropping simultaneously the mixture solution a the alkali solution into deionized water while stirring to obtain precipitant; and 5. washing the precipitant separately with deionized water and organic solvent under stirring, stoving, grinding, sieving and calcining to obtain the composite tin oxide conducting powder with blended antimony and RE. Thus prepared composite tin oxide conducting powder has obviously raised use temperature over 900 deg.c.

Description

technical field [0001] The invention relates to a preparation method of conductive powder which can be used for conductive coating, conductive fiber and conductive plastic, more specifically relates to a preparation method of tin oxide composite conductive powder doped with antimony and rare earth. Background technique [0002] As a functional filler, conductive powder is added to fibers, coatings, plastics, rubber, synthetic rubber, etc., to make it conductive, antistatic, and electromagnetic wave shielding. It is widely used in aviation, aerospace, military, electronics, automobiles, communications, information industries. Metal, carbon, metal oxide and composite conductive powders have been developed. Metal powders are mainly silver powder, nickel powder and copper powder. Silver powder has stable chemical properties, strong corrosion resistance and high conductivity, but it is expensive and is mainly used in important military fields. Copper has low cost and has the sa...

Claims

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Application Information

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IPC IPC(8): C01G19/02H01B1/08
Inventor 刘小珍陈捷
Owner SHANGHAI INST OF TECH
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