beginner's questions about soldering (glass)
 

Bill Browne wrote:
I'd be interested in learning more about this. Wonder what kind of solder?
Lead, silver? Sounds interesting.

--
Bill Browne
Computer for work http://excalibur-dbf.com
Metal & glass for fun http://w.browne.home.att.net

"Daniel A. Mitchell" wrote in message
...

I don't know all the details, but my dad worked in an aircraft
instrument plant during the Korean War, and they soldered glass all the
time. The main thing I can remember about it is that it was done while
submerged in hot oil baths. For one thing, this brought the glass up to
soldering temperature without local thermal shock.

Indium will wet glass and is used to bond
glass faceplates to glass tubes. Don't know
any more details than that.

beginner's questions about soldering (glass)
 

In article ,
Ed Huntress wrote:
"Bill Browne" wrote in message
...
I'd be interested in learning more about this. Wonder what kind of
solder?
Lead, silver? Sounds interesting.

[ ... ]

Then you "tin," or actually metallize, the glass with metal powder and a
borate flux, using a torch flame and heating the glass hot enough to get the
metal to flow. IIRC, the powder we used was either silver or tin.

Once the glass is metallized you can solder it any way you want. The specs
on our job called for ordinary tin/lead solder (this was around 1974). Of

Hmm ... Tektronix oscilloscopes used to use terminal strips made
of notched bars of ceramic, with silver plating in the notches to form
the terminals. There was a warning printed inside the 'scope, and a
roll of special silver-bearing soft solder, because the standard
lead-tin eutectic alloy would dissolve the silver over repeated
re-solderings. This may suggest that the powder that you used was tin,
or it may simply be that there was not enough resoldering to need to
worry about the silver dissolving.

Enjoy,
DoN.
--
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beginner's questions about soldering (glass)
 

"DoN. Nichols" wrote in message
...
In article ,
Ed Huntress wrote:
"Bill Browne" wrote in message
...
I'd be interested in learning more about this. Wonder what kind of
solder?
Lead, silver? Sounds interesting.

[ ... ]

Then you "tin," or actually metallize, the glass with metal powder and a
borate flux, using a torch flame and heating the glass hot enough to get
the
metal to flow. IIRC, the powder we used was either silver or tin.

Once the glass is metallized you can solder it any way you want. The
specs
on our job called for ordinary tin/lead solder (this was around 1974). Of

Hmm ... Tektronix oscilloscopes used to use terminal strips made
of notched bars of ceramic, with silver plating in the notches to form
the terminals. There was a warning printed inside the 'scope, and a
roll of special silver-bearing soft solder, because the standard
lead-tin eutectic alloy would dissolve the silver over repeated
re-solderings. This may suggest that the powder that you used was tin,
or it may simply be that there was not enough resoldering to need to
worry about the silver dissolving.


Well, it was a one-time solder joint, on a piece of vacuum apparatus.

I just got a Christmas card from my old partner. Maybe he remembers. I'll
ask.

Ed Huntress

beginner's questions about soldering (glass)
 

Indium is a Dopant used or once used in Semiconductors. Used to make
infused diodes. Place a ball in a carbon hole on top of a layer of Si
(glass is SiO2) and it makes a internal joint. Atoms merge together.

I thought it was used on glass, then it was electro-plated with copper,
then nickel or
what was needed. Maybe lead.

Martin
--
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@ home at Lion's Lair with our computer
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