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AssigneeCatalysts & Chemicals Industries Co., Ltd.
InventorsHiroyasu Nishida, Noboru Senju, Michio Komatsu
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Amorphous inorganic particles as a dental material includes silica and inorganic oxide(s) other than silica and has high x-ray impermeability. The inorganic particles as a dental material includes silica with the content in the range from 70 to 98 weight % and oxide(s) of one or more elements selected from the group of Zr, Ti, La, Ba, Sr, Hf, Y, Zn, AL, and B, wherein 5 to 70 weight % of the silica is originated from an acidic silicic acid solution and 30 to 95 weight % of the silica is originated from a sol of silica. The inorganic particles as a dental material have an average particle diameter in the range from 1 to 10 μm, specific surface area in the range from 50 to 350 m2/g, pore volume in the range from 0.05 to 0.5 ml/g, amorphous crystallinity as observed by x-ray diffraction, and the refractive index in the range from 1.47 to 1.60.
Inorganic particles as a dental material comprising silica in a range from 70 to 98 weight % and at least one oxide of at least one element selected from the group consisting of Zr, Ti, La, Ba, Sr, Hf, Y, Zn, AL, and B, wherein 5 to 70 weight % of the silica is originated from an acidic silicic acid solution and 30 to 95 weight % of the silica is originated from a sol of silica, said inorganic particles having an average particle diameter in a range from 1 to 10 μm, specific surface area in a range from 50 to 350 m3/g, pore volume in a range from 0.05 to 0.5 ml/g and amorphous crystallinity as observed by x-ray diffraction.
A method of manufacturing inorganic particles as a dental material with a silica content in a range from 70 to 98 weight % comprising the steps of:
Dependencies are inferred from the claim text.