Radiographic phosphor panel, phosphor and phosphor modification method
US5549844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1995 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Mar 24, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A radiographic phosphor panel, phosphor, and phosphor modification method. The radiographic phosphor panel has a luminescent layer including a mass of phosphor particles. The phosphor particles each have a primary portion and a secondary portion. The secondary portion is exterior to and continuous with the primary portion. The primary portion includes a primary phosphor having a combination of species characterized by the relationship: EQU MFX.sub.1-z I.sub.z .multidot.uM.sup.a X.sup.a :yA:eJ:tD:dS The secondary portion includes a secondary phosphor having a combination of species characterized by the relationship: EQU M'FX'.sub.1-z+q I.sub.z-q .multidot.u'M.sup.a 'X.sup.a ':y'A':e'J':t'D':d'S In these relationships, M and M' are selected from Mg, Ca, Sr, and Ba; X and X' are selected from Cl and Br; M.sup.a and M.sup.a ' are selected from Na, K, Rb, and Cs; X.sup.a and X.sup.a ' are selected from F, Cl, and Br; A and A' are selected from Eu, Ce, Sm, and Tb; J and J' are metal oxide; D and D' are selected from V, Cr, Mn, Fe, Co, and Ni; z is greater than 1.times.10.sup.-2 and less than 1; q is from 1.times.10.sup.-2 to 1 and less than or equal to z; u and u' are from 0 to 1; y and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.