Trace element doped needle conductive tin oxide fine-particle and its prepn process
A technology of tin oxide and trace elements, which is applied in the field of needle-shaped conductive fine particles and its manufacture, can solve the problems of unsatisfactory transparency and high surface resistivity, and achieve the effect of avoiding the decline of physical and chemical properties
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Embodiment 1
[0028] Add SnCl to a 5000ml beaker 4 ·5H 2 O and Cd(NO 3 ) 2 4H 2 O into SnCl 4 Concentration is 0.71mol / L, Cd(NO 3 ) 2 The concentration is 0.076mol / L solution 4000ml.
[0029] Add SbCl to a 2000ml beaker 3 Make 1000ml of a solution with a concentration of 0.14mol / L, then add 30g of tartaric acid to generate a clear solution. SbCl 3 solution was added to the SnCl 4 In the solution, the antimony doping amount is made to be 5% (mol ratio). The mixed solution with 2.7% doping amount of Cd is ready for use. Add 5000ml of deionized water into a 20L reactor and heat it to 65°C. While stirring constantly, add the mixed solution of tin, antimony and cadmium and NaOH aqueous solution evenly. Control the pH value of the reaction at 7.5 to generate a uniform doping amount of conductive powder precursor precipitation, and keep the temperature for 30 minutes after feeding. The precursor precipitate was filtered and washed until the conductivity was 1, and the obtained filter ...
Embodiment 2
[0031] Add SnCl to a 5000ml beaker 4 and Cd(NO 3 ) 2 4H 2 O formulated as SnCl 4 Concentration is 0.71mol / L, Cd(NO 3 ) 2 The concentration is 0.076mol / L solution 4000ml. Add SbCl to a 2000ml beaker 3 Make 1000ml of a solution with a concentration of 0.14mol / L, then add 30g of tartaric acid to generate a clear solution. SbCl 3 solution was added to the SnCl 4 In the solution, the antimony doping amount is made to be 5% (mol ratio). The mixed solution with 2.7% doping amount of Cd is ready for use. Mix the above mixed solution with 400ml sodium silicate aqueous solution (with SiO 2 Expressed as 35.4g / L) and NaOH solution were simultaneously added to 5L of pure water at 70°C within 30min to keep the pH value of the reaction solution at 7.5 to produce co-precipitation. The precipitate was filtered and washed with water until the conductivity was <1.
[0032] Mix the resulting mixture evenly and burn it in an electric furnace at 900°C for 1 hour, add HF solution to adj...
Embodiment 3
[0034] In addition to SbCl in the first stage3 Except that the preparation concentration is 0.28mol / L and the addition is 1000ml, all the other conductive fine powders are prepared according to the same method as in Example 1. It was made with a volume resistivity of 1.4 Ω·cm and no needles. See Table 1 for details.
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