[time-nuts] beryllium oxide

[Bruce Griffiths]

d.seiter at comcast.net wrote:
> Since we're on the subject, what does BeO typically look like when it's used as a washer, heatsink, etc.  I ask because I tend to keep everything and I modify things all the time.  Is there any way besides being painted that it could pass as Al?
>
> -Dave 
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>   
Dave

The TO3 beryllia washers I have are light blue, but pure beryllia is white.
Various ionic impurities can be used to impart different colours to the
final product.

Pure Alumina is also white but pink TO3 alumina washers are/were available.

Bruce