Powder, method of producing powder and adsorption apparatus
AssigneeHoya Corporation
InventorsYukiko Murakami, Mari Yokoyama, Shintaro Kobayashi
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Abstract
The present invention is powder constituted from particles of a compound represented by the following general formula (1), (Ca1-aMa)10(PO4)6((OH)1-bFb)2 (1), where in the formula M is a divalent metal element, and the following relations are satisfied: 0<a≦1 and 0≦b≦1. Each of the particles has a surface, a central part, a specific distance part in which a distance from the surface toward the central part is 15 nm, and an area part from the specific distance part to the central part. An amount of the divalent metal element is 3.2 wt % or more in the area part.
Claims19
Powder constituted from particles of a compound represented by the following general formula (1),
- (Ca1-aMa)10(PO4)6((OH)1-bFb)2 (1)
- where in the formula M is a divalent metal element, and the following relations are satisfied:
- 0<a≦1 and 0≦b≦1,
- wherein each of the particles has a surface, a central part, a specific distance part in which a distance from the surface toward the central part is 15 nm, and an area part from the specific distance part to the central part, and
- wherein an amount of the divalent metal element is 3.2 wt % or more in the area part.
Dependencies are inferred from the claim text.