Title:
SCUFFING RESISTANT GLASS
Document Type and Number:
Japanese Patent JPH0952729
Kind Code:
A
Abstract:
To improve fragility, scuffing resistance and durability of glass by incorporating SiO2, RO+R'2O, Li2O and M2O3.
74-78wt.% SiO2, 15-30wt.% RO+R'2O in which a wt. ratio of RO/R'2O is 0.6-1.6 (R is more than one kind selected among Mg, Ca and Zn and R' is more than one kind selected among Li, Na and K), ≥4wt.% Li2O and 0-10wt.% M2O3 (M is B and/or Al) are mixed and heated at 1,450-1,600°C to vitrify. Then, after clarifying this molten glass, the glass is formed in a prescribed shape to obtain the scuffing resistant glass having 2.41-2.47g/cc density, ≤6,700m1/2 B expressed by formula, B=Hv/Kc (B is an index value of the fragility, Hv is Vickers hardness and Kc is fracture toughness) and viscosity of 102 poise at ≤1,600°C.
More Like This:
| JPWO2013094451 | Glass substrate |
| JP2022534026 | Glass and light guide plate with negative color shift |
Inventors:
JITENDORA SEEGARU
TAKADA AKIRA
NAKAO YASUMASA
ITO SETSUO
TAKADA AKIRA
NAKAO YASUMASA
ITO SETSUO
Application Number:
JP14625696A
Publication Date:
February 25, 1997
Filing Date:
June 07, 1996
Export Citation:
Assignee:
ASAHI GLASS CO LTD
International Classes:
C03C3/078; C03C3/087; C03C3/089; C03C3/091; C03C3/093; C03C4/00; (IPC1-7): C03C3/078; C03C3/087; C03C3/089; C03C3/091; C03C3/093; C03C4/00
Attorney, Agent or Firm:
Kenji Izumina
Next Patent: SCUFFING RESISTANT GLASS