seal glass to copper

[dutch@home]

does someone know how to seal and glue glass-copper or glass-brass?
it should be alc. proof and not dissolve.
i have a alc.-meter without the weight section,(broken of) and i want to use a copper or brass cap as a weight.
i dont want to save money,just try to repair it for fun.
i have heard of water-glass,would that do the trick?

[hornedrhodent]

="dutch@home"

i have heard of water-glass,would that do the trick?

If it works it should be safe enough if it's properly cured and rinsed.
Sodium silicate (water glass) breaks down to silica and sodium carbonate when exposed to carbon dioxide in the air.

[Ben Stillin]

Probably a long dead thread but I am also interested in this and have dug up a few copper to pyrex seal articles

http://imajeenyus.com/vacuum/20100923_h ... nner30.pdf" onclick="window.open(this.href);return false;" rel="nofollow


http://www.twi.co.uk/content/ceramics_glass.html" onclick="window.open(this.href);return false;" rel="nofollow

[Ben Stillin]

and here is somewhat of a step by step

http://www.youtube.com/watch?v=OWw32BLodjY" onclick="window.open(this.href);return false;" rel="nofollow

[ozone39]

You can use a no hub coupling. Only pull the rubber out and replace it with two layers of cork, so the seems are opposing. I've done a couple of glass pipe connections this way....Won't work for what your doing, but it works on a larger scale...

[Ben Stillin]

My interest is in development of an internal sensor tree using a small section of Pyrex in between the main body of the tree and the actual sensor. This is to provide some thermal isolation as well as a window an led could be mounted in for lighting the plate.