Preparation method of monodisperse micron-sized hollow ceramic microspheres
A ceramic microsphere and micron-scale technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of complicated steps, poor sphericity, and high requirements for reaction condition control, and achieve stable physical and chemical properties and easy control of reaction conditions , Excellent self-cleaning effect
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Embodiment 1
[0040] A method for preparing monodisperse micron-scale hollow ceramic microspheres with a particle size of 1-6 μm, comprising the following steps:
[0041] 1) Take 0.3 g of sodium hydroxide as the basic catalyst, and mix it with 20 g of sodium hydroxide solution to obtain the basic catalyst solution;
[0042] 2) Add 20 g of methyltrimethoxysilane monomer to 180 mL of deionized water for hydrolysis for 15 minutes, then add the prepared alkaline catalyst solution for polymerization reaction for 3 minutes to obtain a monodisperse micron-sized hollow polysiloxane microsphere solution, Filter the microsphere solution, wash it, dry it at 100°C for 10 hours, and then pulverize it with a pulverizer at a speed of 4500 rpm to obtain a polysiloxane microsphere powder with an average particle size of 2.6 microns and a bulk density of It is 0.41g / ml, and the true density is 1.32g / ml;
[0043] 3) Put the polysiloxane microsphere powder in a high-temperature furnace, heat up to 1300°C at a...
Embodiment 2
[0045] A method for preparing monodisperse micron-scale hollow ceramic microspheres with a particle size of 1-6 μm, comprising the following steps:
[0046] 1) Take potassium hydroxide 0.15g as basic catalyst, be mixed with 30g potassium hydroxide solution, obtain basic catalyst solution;
[0047] 2) Add 40 g of phenyltrimethoxysilane monomer to 300 mL deionized water for hydrolysis for 20 minutes, then add the prepared alkaline catalyst solution for polymerization reaction for 8 minutes to obtain a monodisperse micron-sized hollow polysiloxane microsphere solution, Filter the microsphere solution, wash it, dry it at 150°C for 18 hours, and then pulverize it with a pulverizer at a speed of 5500 rpm to obtain a polysiloxane microsphere powder with an average particle size of 3.05 microns and a bulk density of It is 0.43g / ml, and the true density is 1.34g / ml;
[0048] 3 Put the polysiloxane microsphere powder in a high-temperature furnace, raise the temperature to 1200°C at a r...
Embodiment 3
[0050] A method for preparing monodisperse micron-scale hollow ceramic microspheres with a particle size of 1-6 μm, comprising the following steps:
[0051] 1) Mix 60 g of vinyltrimethoxysilane and 5 g of aminopropyltrimethoxysilane and add it to 220 mL of deionized water for hydrolysis for 30 minutes, then add 30 g of ammonia solution (5% by mass) for polymerization for 16 minutes to obtain mono Disperse the micron-sized hollow polysiloxane microsphere solution, filter the microsphere solution, wash, dry at 115°C for 20 hours, and pulverize it with a pulverizer at a speed of 5000 rpm to obtain polysiloxane microspheres Powder, the average particle size is 6.3 microns, the bulk density is 0.49g / ml, and the true density is 1.31g / ml;
[0052] 2) Put the polysiloxane microsphere powder in a high-temperature furnace, raise the temperature to 1350°C at a rate of 3.5°C / min, and then heat-preserve and sinter for 1.5h to prepare ceramic microspheres. The average particle size of the c...
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