Re: Glass an metal properties when heatet and cooling down again.

On Sat, 5 Nov 2005 12:38:18 +0100, "Søren M"
<donotwritehere@xxxxxxxxxxx> wrote:

>I am trying to put different materials in to glass in a oven i know that
>Copper and glass react equal when heetet to about 1200 degrees and
>cooling down again should have same properties.

>Does silver and glass have the same properties expanding and deexpanding
>when cooling down again..

The electronics industry has produced sealing glasses for metal leads
to pass through the walls of glass (or metal) vessels for many years.
To produce effective seals often calls for the use of a number of
glasses with gradually increasing or decreasing CofE to get a
strain-free seal.

These are called "graded seals". If you put "Sealing glasses" into
Google, you will get a lot of useful links.
--
Terry Harper
URL: http://www.btinternet.com/~terry.harper/
.