Needle-shaped x-ray fluorescent material and method for vapor-deposition thereof on a substrate

US7189426B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Manfred Fuchs · Nuremberg, DE
• Erich Hell · Erlangen, DE
• Wolfgang Knüpfer · Erlangen, DE
• Detlef Mattern · Erlangen, DE
• Peter Röhrer · Bubenreuth, DE

Key dates

• Filing date: Jul 18, 2003
• Grant date: Mar 13, 2007
• Expiry date: Jul 18, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/7733
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In a method for vapor-depositing a substrate with a layer of a needle-shaped x-ray fluorescent material containing at least one alkali metal, alkali halide phases and an alkali halide are mixed in a vapor phase and are vapor-deposited on the substrate. A needle-shaped fluorescent material is thereby produced having the formulawherein M+ is at least one metal ion from the group Na, K, Rb and Cs, H− is at least one halide from the group F, Cl, Br and I and Sz+ is at least one lanthanide ion from the group La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu.