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US 12,325,661 B2Granted
Lead free glass composition for microchannel plate fabrication
AssigneeCorning Incorporated
InventorYves Andre Henri Brocheton
Life of this patent
Estimating the term…
Abstract
Disclosed herein are lead free glass compositions having, in some embodiments, SiO2 from 25 wt % to 60 wt %, Al2O3 from 0 wt % to 20 wt %, B2O3 from 0 wt % to 35 wt %, ZrO2 from 0 wt % to 5 wt %, Li2O from 5 wt % to 17 wt %, Na2O from 3 wt % to 10 wt %, K2O from 1 wt % to 10 wt %, RO from 0 wt % to 20 wt %, wherein RO is an alkaline earth oxide, ZnO from 0 wt % to 15 wt %, and 0 wt % lead.
Claims17
A glass composition, comprising:
- SiO2 from 25 wt % to 60 wt %,
- Al2O3 from 0 wt % to 20 wt %,
- ZrO2 from 0 wt % to 5 wt %,
- Li2O from 5 wt % to 17 wt %,
- Na2O from 3 wt % to 10 wt %,
- K2O from 1 wt % to 10 wt %,
- RO from 0 wt % to 20 wt %, wherein RO comprises an alkaline earth oxide,
- ZnO from 0 wt % to 15 wt %,
- greater than or equal to 0 wt % and less than 10 wt % B2O3, and
- 0 wt % lead,
- wherein RO+ZnO is greater than 10 wt %, and
- wherein a coefficient of thermal expansion of the glass composition is greater than or equal to 70×10−7 per degrees Celsius and less than 85×10−7 per degrees Celsius.
9 more elements
A glass composition, comprising:
- SiO2 from 30 wt % to 50 wt %,
- Al2O3 from 6 wt % to 15 wt %,
- B2O3 from 14 wt % to 28 wt %,
- ZrO2 from 0 wt % to 3 wt %,
- Li2O from 3 wt % to 7 wt %,
- Na2O from 3 wt % to 8 wt %,
- K2O from 2 wt % to 8 wt %,
- RO from 0 wt % to 5 wt %, wherein RO comprises an alkaline earth oxide,
- ZnO from 1 wt % to 8 wt %, and
- 0 wt % lead.
7 more elements
Dependencies are inferred from the claim text.