Title:
蛍光体粉末および発光装置
Document Type and Number:
Japanese Patent JP7394125
Kind Code:
B2
Abstract:
A phosphor powder contains an EU-activated β-type sialon phosphor particles. When a median diameter in the phosphor powder having not been subjected to an ultrasonic homogenizer treatment is set as D1 and a median diameter in the phosphor powder having been subjected to an ultrasonic homogenizer treatment is set as D2, 1.05≤D1/D2≤1.70. A dispersion liquid in which 30 mg of the phosphor powder is uniformly dispersed in 100 ml of a 0.2% concentration of a sodium hexametaphosphate aqueous solution is added to a columnar container of which a bottom surface has an inner diameter of 5.5 cm. Then, the dispersion liquid is irradiated with ultrasonic waves for 3 minutes at a frequency of 19.5 kHz, and an output of 150 W, in a state where a cylindrical tip, which has an outer diameter of 20 mm, of an ultrasonic homogenizer is immersed in the dispersion liquid in ≥1.0 cm.
Inventors:
Manabu Kobayashi
Tomohiro Nomiyama
Tomohiro Nomiyama
Application Number:
JP2021516029A
Publication Date:
December 07, 2023
Filing Date:
April 15, 2020
Export Citation:
Assignee:
Denka Company Limited
International Classes:
C09K11/64; H01L33/50
Domestic Patent References:
| JP2007308593A | ||||
| JP2017210529A |
Foreign References:
| WO2016186058A1 | ||||
| WO2010143590A1 |
Attorney, Agent or Firm:
Shinji Hayami