Method of preparing high-purity ultra-fine sphere silicon micro-powder
A spherical silica powder, high-purity technology, applied in the direction of silicon oxide, silicon dioxide, fibrous fillers, etc., can solve the problems of large output of spherical silica powder, low input-output rate, low spheroidization rate, etc., and achieve production costs Low, small thermal conductivity, high spheroidization effect
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Embodiment 1
[0010] Embodiment 1: Use natural powder quartz ore powder to remove the hexagonal powder with high hardness through rough separation, and obtain high-quality natural powder quartz ore powder with high spheroidization ratio and high purity. Roughly selected high-quality natural powder quartz ore is washed with water to suspend impurities and mud on the surface, sieved and removed, and then washed with pure water, and then add high-quality natural powder quartz ore with 3% silicon by weight. Stir with sodium phosphate, adjust the pH value of the aged high-quality natural powder quartz ore powder within 9±0.5, make it age, the aging time is 10 hours, after aging, dehydrate, dry and disperse, and make powder Shaped quartz ore powder, or adding an appropriate amount (to make the powdered quartz ore powder in a viscous state after stirring) sodium silicate binder to stir and disperse, (sodium silicate forms nano-scale silicon micropowder through high temperature, in which the oxidize...
Embodiment 2
[0011] Embodiment 2: Use natural powder quartz ore powder to remove hexagonal powder with high hardness through rough separation, and obtain high-quality natural powder quartz ore powder with high spheroidization ratio and high purity. After the rough selection, the high-quality natural powder quartz ore powder is pickled, then alkaline washed, neutralized, impurity removed, sieved, bleached, washed and filtered with pure water to remove impurities, and then 8% of the weight of high-quality natural powder quartz ore powder is added Stir with sodium silicate, adjust the pH value of the aged high-quality natural powder quartz ore powder within 10±0.5, make it aged for 10 hours, its SiO2 content is 99.6%, dehydrate and dry to disperse, and the moisture content is controlled at 0.65% , to make powdery quartz ore powder, or add an appropriate amount (to make the quartz ore powder in a viscous state after stirring) sodium silicate binder and stir, (sodium silicate forms nano-scale si...
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