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1. (WO2017154560) NEAR-INFRARED ABSORPTION FILTER GLASS

Pub. No.:    WO/2017/154560    International Application No.:    PCT/JP2017/006418
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Feb 22 00:59:59 CET 2017
IPC: C03C 4/08
C03C 3/062
G02B 5/22
Applicants: NIPPON ELECTRIC GLASS CO., LTD.
日本電気硝子株式会社
Inventors: KONOSHITA Satoko
此下聡子
NAGANO Yuta
永野雄太
Title: NEAR-INFRARED ABSORPTION FILTER GLASS
Abstract:
Provided is near-infrared absorption filter glass which has desirable near-infrared absorption properties and excellent weather resistance and vitrification stability and is less susceptible to cracks or fractures in an annealing step after being formed. The near-infrared absorption filter glass is characterized by including, in mass%, 65 to 80% of P2O5, 1 to 10% of SiO2, 7 to 25% of Al2O3, 0.1 to 14% of R2O (R is at least one element selected from Li, Na, and K), 1.5 to 20% of R'O (R is at least one element selected from Mg, Ca, Sr, Ba, and Zn), 1.5 to 20% of MgO, and 1 to 15% of CuO, and having a mass ratio P2O5/SiO2 of 10 to 80.