US 2010/0006768 A1Published application

PROCESS FOR PRODUCING Bi12XO20 POWDER, Bi12XO20 POWDER, RADIATION PHOTO-CONDUCTOR, RADIATION DETECTOR, AND RADIATION IMAGING PANEL

AssigneeFUJIFILM Corporation

InventorsTomotake Ikada, Shigeru Nakamura

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Abstract

A Bi12XO20 powder, wherein X represents at least one kind of element selected from the group consisting of Si, Ge, and Ti, is produced by a process comprising: a step (A) of preparing a solution containing the Bi element and a solution containing the X element, a step (B) of adding the two kinds of the solutions to a mother liquor having been previously fed into a reaction chamber, a mixed liquid being thereby prepared, and a step (C) of raising a temperature of the mixed liquid from the temperature, at which the addition is begun. In the step (B), the addition of the two kinds of the solutions is performed such that the substance quantities of the Bi element and the X element in the mixed liquid increase in parallel from the time at which the addition is begun.

Claims21

Dependent claims

A process for producing a Bi12XO20 powder, wherein X represents at least one kind of element selected from the group consisting of Si, Ge, and Ti, the process comprising:

i) a step (A) of preparing a solution containing the Bi element and a solution containing the X element,
ii) a step (B) of adding the solution containing the Bi element and the solution containing the X element to a mother liquor having been previously fed into a reaction chamber, a mixed liquid being thereby prepared, and
iii) a step (C) of raising a temperature of the mixed liquid from the temperature, at which the addition of the solution containing the Bi element and the solution containing the X element to the mother liquor is begun,
the addition of the solution containing the Bi element and the solution containing the X element to the mother liquor in the step (B) being performed such that both of the substance quantity of the Bi element and the substance quantity of the X element in the mixed liquid increase in parallel from the time at which the addition of the solution containing the Bi element and the solution containing the X element to the mother liquor is begun.

1 more element

A radiation photo-conductor, containing a Bi12XO20 polycrystal, wherein X represents at least one kind of element selected from the group consisting of Si, Ge, and Ti, with the proviso that the radiation photo-conductor may contain inevitable impurities,

wherein the polycrystal has a composition satisfying the condition of Formula (2):
0.94≦X/Bi12≦0.99 (2)
wherein X/Bi12 represents the substance quantity of the X element with respect to 12 mols of the Bi element.

A radiation photo-conductor, containing a binder and a Bi12XO20 powder, the particles of which have been bound with one another by the binder, wherein X represents at least one kind of element selected from the group consisting of Si, Ge, and Ti,

wherein the Bi12XO20 powder has a composition satisfying the condition of Formula (2):
0.94≦X/Bi12≦0.99 (2)
wherein X/Bi12 represents the substance quantity of the X element with respect to 12 mols of the Bi element.

Dependencies are inferred from the claim text.