Method for producing a scintillator ceramic
AssigneeSiemens Aktiengesellschaft
InventorsJuergen Leppert, Wolfgang Rossner
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Abstract
For manufacturing a scintillator ceramic of a rare earth oxisulfide, a pigment powder is compressed by single-axis hot-pressing to form a ceramic member having at least 99.9% of the theoretic density, the pigment powder having the general formula (M.sub.1 xLn.sub.x).sub.2 O.sub.2 S, whereby M denotes at least one element from the group Y, La and Gd, Ln represents at least one element from the group Eu, Ce, Pr, Tb, Yb, Dy, Sm and Ho, and whereby 1.times.10.sup.-6 .ltoreq.x.ltoreq.2.times.10.sup.-1, and the powder having a specific surface according to BET of at least 10 m.sup.-2 /g.
Claims14
A method for producing a high-density scintillation ceramic of a rare earth oxisulfide, comprising the steps of:
- providing a pigment powder having the general formula
- (M.sub.1-x Ln.sub.x).sub.2 O.sub.2 S
- wherein M is at least one element selected from the group consisting of Y, La and Gd, Ln is at least one element selected from the group consisting of Eu, Ce, Pr, Tb, Yb, Dy, Sm and Ho and 1.times.10.sup.-6 .ltoreq..times..ltoreq.2.times.10.sup.-1, said powder having a specific surface of at least 10 m.sup.2 /g determined with the gas absorption method according to BET;
- and
- compressing said pigment powder by single-axis hot-pressing to form a translucent ceramic member having a density of at least 99.9% of the theoretical density.
Dependencies are inferred from the claim text.