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Tin oxide needle-like conductive particulate and process for preparing same

A technology of tin oxide and manufacturing method, applied in the directions of oxide conductors, tin oxides, non-metallic conductors, etc., can solve the problems of large equipment investment, environmental pollution, poor safety, etc., and achieve small equipment investment, no environmental pollution, and safety. good effect

Inactive Publication Date: 2009-11-04
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved in the present invention is to provide a needle-shaped conductive fine particle of tin oxide and its manufacturing method, so as to overcome the defects of large equipment investment, poor safety and environmental pollution in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of SnCl 4 The concentration is 0.7mol / L, Cd(NO 3 ) 2 Concentration is 4000ml of the mixed solution of 0.076mol / L. Prepare SbCl 3 Concentration is 0.14mol / L solution 1000ml, add tartaric acid 30g to generate clear liquid. SbCl 3 solution was added to the SnCl 4 In the process, a mixed solution with an antimony doping amount of 5% (mol ratio) and a Cd doping amount of 2.7% (mol ratio) was prepared for use. Add 5000ml of deionized water into a 20L reactor and heat it to 90°C. While stirring constantly, add the tin-containing mixed solution and 20% NaOH aqueous solution evenly. Control the pH value of the reaction at 7.5 to generate a uniformly doped conductive powder precursor. After feeding, keep warm for 30 minutes, filter the precursor, and dry the obtained filter cake at 110°C for 8 hours. Add 20% NaCl and 3% colloidal powder Silica (both based on the weight of the filter cake after drying), mix the resulting mixture evenly, burn at 800°C for 1 hour,...

Embodiment 2

[0026] Preparation of SnCl 4 The concentration is 0.7mol / L, Cd(NO 3 ) 2 Concentration is 4000ml of the mixed solution of 0.076mol / L. Prepare SbCl 3 Concentration is 0.14mol / L solution 1000ml, add tartaric acid 30g to generate clear liquid. SbCl 3 solution was added to the SnCl 4 In this process, a mixed solution with an antimony doping amount of 5% (mol ratio) and a Cd doping amount of 2.7% was prepared for use. Mix the above mixed solution with 400ml sodium silicate aqueous solution (with SiO 2 Expressed as 35.4g / L) and 20% NaOH solution, they were added to 5L pure water at 70°C within 30min at the same time, and the pH value of the reaction solution was kept at 7.5 to produce coprecipitation. Filter the precipitated precursor, dry at 120°C for 6 hours, add 13% NaCl and mix evenly, burn at 800°C for 1 hour, then raise the temperature to 1150°C for 2.5 hours, the obtained burnt product Add it into a 25% NaOH solution to prepare a suspension with a solid content of 25%,...

Embodiment 3

[0028] Preparation of SnCl 4 Concentration is 2.857mol / L, SbCl 3 500ml of a solution with a concentration of 0.0295mol / L. The above solution and 17.4ml sodium silicate aqueous solution (as SiO 2 Expressed as 308g / L) and 18% NaOH solution were simultaneously added to 5L pure water at 90° C. within 20 minutes to keep the pH value of the system at 7-7.5 to produce co-precipitation. Filter the precipitated precursor, dry at 110°C for 8 hours, add 20% NaCl and mix evenly, burn at 800°C for 1 hour, then raise the temperature to 1150°C for 2 hours, and the obtained burnt The substance is added into a 15% NaOH solution to prepare a suspension with a solid content of 15%, and the temperature is raised to 80° C., stirred for 1 hour and then filtered. The filter cake is beaten with water (10% solid content) and the pH is adjusted to about 7, heated To 80 ℃, dropwise add 15% NaOH aqueous solution and the mixed solution of Sn, Sb (Sn:Sb=1:9mol ratio, the addition amount is 15% of the we...

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Abstract

The invention discloses a method for manufacturing tin oxide needle-shaped conductive fine particles. Including: 1) preparing the precursor precipitate; characterized in that it also includes the following steps: 2) drying the precursor precipitate at 105-120° C. for 5-8 hours; 3) adding NaCl and / or containing Silicon compound; 3) After pulverization, burning: burning at 750-800°C for 0.5-1.5 hours, then burning at 1050-1200°C for 1-3 hours; Beat for 1.5 to 2 hours at a temperature of °C, and filter to obtain needle-shaped conductive fine particles of tin oxide. The powder resistance of the obtained tin oxide acicular conductive powder can reach below 2Ω, and the acicular ratio is 20-30. The method for preparing tin oxide needle-shaped conductive fine particles has small equipment investment, good safety, no environmental pollution, and is convenient for industrialized implementation.

Description

technical field [0001] The invention relates to a needle-shaped conductive fine particle and a manufacturing method thereof, in particular to a tin oxide needle-shaped conductive fine particle and a manufacturing method thereof. Background technique [0002] With the rapid development of the petrochemical industry, the application field of polymer materials is constantly expanding, but due to its high surface resistivity, it is easy to accumulate static electricity during use, resulting in a series of hazards. The method of doping antistatic agent can solve such problems to a certain extent. Antistatic agents can be divided into two categories: (1) Conductive substances (such as carbon black, carbon fiber, metal wire, conductive polymers and conductive inorganic substances). (2) Moisture adsorption type antistatic agent in the air. [0003] The first kind of traditional conductive substances used as electrostatic agents are restricted by factors such as color, easy oxidati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/02C04B35/457H01B1/08
Inventor 吴秋芳陈国建李福清陈雪梅陈刚马新胜
Owner SHANGHAI HUAMING HI TECH GRP
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