Patent ID: 9284215
Filing Date: 2016-03-15
CPC Classification: C03C,Y10T

Claim Text:
1. A glass for chemical strengthening, comprising, in mole percentage based on following oxides, 55% to 80% of SiO 2 , 3% to 16% of Al 2 O 3 , 0% to 12% of B 2 O 3 , 5% to 16% of Na 2 O, 0% to 4% of K 2 O, 0% to 15% of MgO, 0% to 3% of CaO, 0% to 18% of ΣRO, where R represents Mg, Ca, Sr, Ba or Zn, 0% to 1% of ZrO 2 , 0.01% to 0.2% of Co 3 O 4 , 0.05% to 1% of NiO, and 0.01% to 3% of Fe 2 O 3 , wherein a content ratio Co 3 O 4 /Fe 2 O 3 is 0.05 or more.