A kind of preparation method of high whiteness conductive nano-zinc oxide powder
A nano-zinc oxide powder, conductive nano technology, applied in the preparation of high-whiteness conductive nano-zinc oxide powder, the field of preparation of high-whiteness conductive zinc oxide nano-powder, can solve secondary sintering, high risk, white In order to improve the reactivity, ensure the electrical conductivity, and produce with low energy consumption, etc.
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[0031] Such as figure 1 Shown, a kind of preparation method of high-whiteness conductive nano-zinc oxide powder, the step of this method comprises:
[0032] (1) Use water and / or ethanol to wash the non-conductive nano zinc oxide powder, and dry;
[0033] (2) dissolving the soluble salt of the doping element in water, so that the soluble salt of the doping element is completely dissolved to obtain a solution;
[0034] The soluble salt of the doping element is one or a mixture of two or more of the chlorides, nitrates, acetates or perchlorates of tin, aluminum, gallium or indium;
[0035] (3) mixing the non-conductive nano-zinc oxide powder obtained in step (1) with the solution obtained in step (2) to obtain a paste;
[0036] (4) drying the paste obtained in step (3) to obtain powder;
[0037] (5) Calcining the powder obtained in step (4) to obtain a high-whiteness conductive nano-zinc oxide powder.
[0038] In the step (5), the roasting process includes a heating process a...
Embodiment 1
[0044] Weigh 1 kg of commercially available nano-sized zinc oxide, wash with deionized water and ethanol three times respectively, and set aside. Another 0.02kg of gallium chloride was weighed and dissolved in 2 liters of deionized water. Under the stirring speed of 400rpm of the electric stirrer, add the washed commercially available nano-sized zinc oxide into the above-mentioned gallium chloride solution while stirring to form a paste, continue to stir for 2 hours, and put the above-mentioned paste at 120°C After drying in the oven, the powder is obtained, then put the powder into the rotary tube furnace, and fill the rotary tube furnace with inert gas, set the temperature rise program of the rotary tube furnace, first raise the temperature to 100°C, keep it warm for 0.5h, and then raise the temperature to 200°C, hold for 0.5h, then raise the temperature to 300°C, and hold for 4h; after the hold is completed, lower the temperature, first cool down to 200°C, hold for 0.5h, th...
Embodiment 2
[0049] Weigh 1 kg of commercially available nano-sized zinc oxide, wash with deionized water and ethanol three times respectively, and set aside. Another 0.001kg of indium nitrate was weighed and dissolved in 2 liters of deionized water. Under stirring at a speed of 400 rpm by an electric stirrer, the washed commercially available nano-sized zinc oxide was added to the above-mentioned gallium chloride solution while stirring to form a paste, and the stirring was continued for 2 hours. Put the above paste into a 120°C oven to dry to obtain a powder, then put the powder into a rotary tube furnace, and fill the rotary tube furnace with inert gas, set the temperature rise program of the rotary tube furnace, the temperature rise program is : First raise the temperature to 100°C, hold for 0.5h, then raise the temperature to 300°C, hold for 0.5h, then raise the temperature to 450°C, hold for 4h; ℃, keep warm for 0.5h, and finally lower to room temperature. When the temperature of th...
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