Title:
FLUORESCENT SUBSTANCE HAVING AFTERGLOW PROPERTY
Document Type and Number:
Japanese Patent JP3232549
Kind Code:
B2
Abstract:
PURPOSE: To improve heat resistance, water resistance and productivity of an aluminate fluorescent substance with afterglow property having high brightness of phosphorescence.
CONSTITUTION: This fluorescent substance having afterglow property is expressed by the chemical composition formula within the following range in an aluminate fluorescent substance activated by divalent europium: (M1-p-qEUpQq)O.n (Al1-mBm) 2O3'=.kP2O5 [0.0001≤(p)≤0.5, 0.0001≤(q)≤0.5, 0.5≤(n)≤3, 0.0001≤(m)≤0.5, 0<k≤0.2, 0.0002≤(p+q)≤0.75; M in the composition formula is at least one kind of metal selected from a group of Mg, Ca, Sr, Ba and Zn and Q is a coactivating agent and at least one kinds of metal selected from a group consisting of Mn, Zr, Nb, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu].
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Inventors:
Yoshinori Murasaki
Hiroto Tamaki
Hiroto Tamaki
Application Number:
JP22284395A
Publication Date:
November 26, 2001
Filing Date:
August 31, 1995
Export Citation:
Assignee:
Nichia Corporation
International Classes:
C09K11/71; (IPC1-7): C09K11/71
Domestic Patent References:
| JP711250A | ||||
| JP5434573A | ||||
| JP6169885A | ||||
| JP5947288A | ||||
| JP8127772A |
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