Sealing glasses for titanium and titanium alloys

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:871050

Brow, Richard K ^[1]; McCollister, Howard L ^[1]; Phifer, Carol C ^[1]; Day, Delbert E ^[2]

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1. Albuquerque, NM
2. Rolla, MO

Barium lanthanoborate sealing-glass compositions are provided comprising various combinations (in terms of mole-%) of boron oxide (B.sub.2 O.sub.3), barium oxide (BaO), lanthanum oxide (La.sub.2 O.sub.3), and at least one other oxide selected from the group consisting of aluminum oxide (Al.sub.2 O.sub.3), calcium oxide (CaO), lithium oxide (Li.sub.2 O), sodium oxide (Na.sub.2 O), silicon dioxide (SiO.sub.2), or titanium dioxide (TiO.sub.2). These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys having an improved aqueous durability and favorable sealing characteristics. Examples of the sealing-glass compositions are provided having coefficients of thermal expansion about that of titanium or titanium alloys, and with sealing temperatures less than about 900.degree. C., and generally about 700.degree.-800.degree. C. The barium lanthanoborate sealing-glass compositions are useful for components and devices requiring prolonged exposure to moisture or water, and for implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps).

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia Corporation (Albuquerque, NM)
• Patent Number(s): US 5648302
• OSTI ID: 871050
• Country of Publication: United States
• Language: English

Related Subjects

sealing
glasses
titanium
alloys
barium
lanthanoborate
sealing-glass
compositions
provided
comprising
various
combinations
terms
mole-
boron
oxide
bao
lanthanum
selected
consisting
aluminum
calcium
cao
lithium
sodium
na
silicon
dioxide
sio
useful
forming
hermetic
glass-to-metal
seals
improved
aqueous
durability
favorable
characteristics
examples
coefficients
thermal
expansion
temperatures
900
degree
700
-800
components
devices
requiring
prolonged
exposure
moisture
water
implanted
biomedical
batteries
pacemakers
defibrillators
pumps
sealing-glass compositions
glass-to-metal seals
sealing glasses
lithium oxide
titanium alloy
glass compositions
boron oxide
calcium oxide
aluminum oxide
thermal expansion
provided comprising
glass composition
titanium dioxide
silicon dioxide
sodium oxide
titanium alloys
various combinations
medical device
oxide selected
metal seal
medical devices
sealing glass
forming hermetic
lanthanum oxide
lanthanoborate sealing-glass
glass-to-metal seal
hermetic glass
metal seals
barium oxide
/501/428/