From: "Richard Schwartz" 
To: 
Reply-To: "Richard Schwartz" 


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Subject article appeared in may issue of OE Magazine (published by = SPIE).
  It deals with LTB: "Low Temperature Bonding" of glass and like
=
materials.   You can bond ribs to thin glass to form ribbed mirrors, and =
you can bond layers of thin glass to form a thicker piece.   The bonding =
is permanent.   You don't need a kiln.

Here is how to do it:

"...the bonding surfaces are cleaned and chemically primed for joining
= using standard wet chemical or plasma processes.  Following chemical =
activation, the materials are brought into a class 100 clean box [I = guess
that means no dirt] where joining is initiated by sandwiching a = small
volume of bonding solution between the two mating surfaces.   The =
bonding solution reacts with the substrate surfaces to form a bond that =
can become rigid within a few hours or even a few minutes depending on =
the process conditions..."

Simple.  All you need to do is figure out what they mean by
"chemically = primed", "activation", and what the
bonding solution is.  (They tell you = it is "inorganic aqueous-based
bonding fluid.)     Oh, yeah, this works =
for surfaces polished to match withing 1/3 wave (well within our = capabilities).

So, what's the magic juice and the meaning of the undefined words =
"chemically primed" and "activation"?   If we discover
this, we don't =
need a kiln to build ribbed mirrors.

. . . Richard

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Subject article appeared in may issue =
of OE=20
Magazine (published by SPIE).   It deals with LTB:
"Low = Temperature=20
Bonding" of glass and like materials.   You can bond
ribs to = thin=20
glass to form ribbed mirrors, and you can bond layers of thin glass to = form a=20
thicker piece.   The bonding is
permanent.   You = don't need=20
a kiln.
 
Here is how to do
it:
 
"...the bonding surfaces
are cleaned =
and chemically=20
primed for joining using standard wet chemical or plasma = processes. =20
Following chemical activation, the materials are brought into a class = 100 clean=20
box [I guess that means no dirt] where joining is initiated by = sandwiching a=20
small volume of bonding solution between the two mating =
surfaces.  =20
The bonding solution reacts with the substrate surfaces to form a bond = that can=20
become rigid within a few hours or even a few minutes depending on the = process=20
conditions..."
 
Simple.  All you need
to do is =
figure out what=20
they mean by "chemically primed", "activation", and
what the bonding = solution=20
is.  (They tell you it is "inorganic aqueous-based bonding=20
fluid.)     Oh, yeah, this works for
surfaces = polished to=20
match withing 1/3 wave (well within our capabilities).
 
So, what's the magic juice and the =
meaning of the=20
undefined words "chemically primed" and
"activation"?   If we = discover=20
this, we don't need a kiln to build ribbed mirrors.
 
. . . =
Richard

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