Crystallized glass spacer for field emission display and...

Details Crystallized glass spacer for field emission display and... Crystallized glass spacer for field emission display and...

2008-04-29

2008-04-29

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

C501S005000, C065S033100

Reexamination Certificate

active

11746986

ABSTRACT:
Provided is a crystallized glass spacer for a field emission display resistant to charging with application of an electric field and resistant to chipping or cracking thanks to high fracture toughness.An SiO2—TiO2-based glass is subjected to a reduction and crystallization heat treatment at 600-900° C. in a hydrogen atmosphere or in a mixed atmosphere of hydrogen and nitrogen, to obtain a crystallized glass spacer for FED consisting essentially of, in molar percentage, SiO2: 20-50%, TiO2: 25-45%, MgO+CaO+SrO+BaO+ZnO: 20-50%, B2O3+Al2O3: 0-10% and ZrO2: 0-10%, and containing as a principal crystal at least one crystal selected from BaXTi8O16-based crystals (X=0.8-1.5), Ba2TiSi2O8-based crystals and TiO2-based crystals.

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