Class of high energy detecting phosphors

US6228286A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Paul Leblans · Kontich, BE
• Peter Willems · Mortsel, BE
• Luc Struye · Mortsel, BE
• Johann-Martin Spaeth · Paderborn, DE
• Thomas D. Pawlik · Rochester, US

Key dates

• Filing date: Apr 12, 1995
• Grant date: May 8, 2001
• Expiry date: Apr 12, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G21K2004/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An elpasolite phosphor is provided corresponding to the general formula: EQU A.sub.2-y B.sub.1+y Me.sup.3+ X.sub.6 :xD wherein: PA1 A=a monovalent ion PA1 B=a monovalent ion PA1 A is different from B PA1 Me.sup.3+ =a trivalent ion PA1 D is a dopant PA1 X is at least one of F, Cl, Br and I PA1 0.ltoreq.y.ltoreq.1 PA1 0.ltoreq.x.ltoreq.0.2 and wherein said phosphor has a specific gravity (sg).gtoreq.4. An elpasolite phosphor corresponding to the general formula above is especially useful in the production of prompt emitting X-ray screens and in the production of X-ray energy storage screens.