Preparation method of silicon dioxide powder filler, powder filler obtained through preparation method and application of powder filler
A technology for silica and powder fillers, which is applied in the preparation of silica powder fillers and in the field of powder fillers, and can solve the problem that the dielectric constant cannot meet the requirements of small-sized communication equipment.
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example 1
[0030] Take a certain weight part of deionized water at room temperature, disperse commercially available barium titanate with an average particle size of 0.3 microns in water, put it into a reaction kettle with a stirrer, start stirring, and add 80 parts by weight of methyl trimethoxy silane was stirred for 1 hour. After methyltrimethoxysilane was dissolved, 25 parts by weight of 5% ammonia water was added and stirred for 10 seconds, then the stirring was stopped. After resting for 1 hour, filter and dry to obtain a spherical powder. Put the powder into a muffle furnace and slowly raise the temperature, discharge the organic matter in an oxygen-containing atmosphere, raise the temperature to 1000 degrees, and calcinate for 6 hours to obtain a spherical barium titanate-containing silicon dioxide powder. The analytical results of the samples are listed in Table 1 below:
[0031] Table 1
[0032]
[0033] Electron microscope and EDX analyze the result of embodiment 1-3 as ...
example 2
[0035] Take a certain weight part of deionized water at room temperature, disperse commercially available titanium oxide with an average particle size of 0.38 microns in water, put it into a reaction kettle with a stirrer, start stirring, and add 75 parts by weight of methyl trimethoxy The silane and 5 parts by weight of tetraethoxysilane were stirred for 1 hour. After methyltrimethoxysilane and tetraethoxysilane were dissolved, 25 parts by weight of 5% ammonia water was added and stirred for 10 seconds, then the stirring was stopped. After resting for 1 hour, it was filtered and dried to obtain a powder. Put the powder into a muffle furnace and slowly raise the temperature, discharge the organic matter in an oxygen-containing atmosphere, raise the temperature to 850°C, and calcinate for 12 hours to obtain a silicon dioxide powder containing titanium oxide. The analysis results of the samples are listed in Table 2 below:
[0036] Table 2
[0037]
[0038] Electron microsco...
example 3
[0040] Take a certain weight part of deionized water at room temperature, disperse commercially available calcium titanate with an average particle size of 2 microns in the water, put it into a reaction kettle with a stirrer, start stirring, and add 78 parts by weight of methyl trichloride The silane and 2 parts by weight of dimethyldichlorosilane were stirred for 1 hour. The volume fraction of calcium titanate is 30%. The contents were filtered, washed with water and dried. The white solid was pulverized with a pulverizer to obtain an angular powder with an average particle size of 50. Put the aggregated powder into a muffle furnace and slowly raise the temperature, discharge the organic matter in an oxygen-containing atmosphere, raise the temperature to 1000°C, and calcinate for 12 hours to obtain the calcium titanate-containing angular silica powder of Example 5. The average particle size of the samples was 42 microns. The result of electron microscope and EDX analysis, ...
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