Patent Profile
| Patent No: | IN225682 [India] | Application No: | 0371DEL2002 |
| Title: | A process for preparation of long decay luminescent powder | ||
| Issue Date: | 20-11-2008 | File Date: | 28-03-2002 |
| Inventor(s): | SHANKER V, CHANDER J, HARNATH D, GHOSH PK | ||
| IPC Classification: | C01F1/00 | ||
| Abstract: | The present invention provides a process for the preparation of a long decay luminescent powder having the basic composition comprising an alkaline earth aluminate, an activator such as Eu and a co-activator has been disclosed. The said Luminescent powder has been synthesized by use of an alkaline earth metal salt along with single phase alumina, an activator and a co-activator. The after glow was found to be more than 150 hours. The process uses a reducing agent in the form of carbon or an organic compound, mixed in the starting material mixture that provides a reducing atmosphere in situ within the mass upon heating. | ||
CSIR-National Physical Laboratory[CSIR-NPL]
: director[at]nplindia[dot]org
:91-11-45609201
:https://www.nplindia.in
: director[at]nplindia[dot]org
:91-11-45609201
:https://www.nplindia.in
Industrial Applications
Inorganic materials [Chemistry, Chemical Processes]
Sustainable Development Goals (SDGs)
Responsible Consumption and Production
CSIR-Themes
Mining , Minerals, Metals And Materials