[time-nuts] beryllium oxide

Bruce Griffiths bruce.griffiths at xtra.co.nz
Fri Jan 16 15:49:35 EST 2009


Bruce Griffiths wrote:
> Poul-Henning Kamp wrote:
>   
>> In message <4970E72D.1050300 at rubidium.dyndns.org>, Magnus Danielson writes:
>>
>>   
>>     
>>> I have encountered Beryllium in a field none of you mentioned, as 
>>> material for speaker cones. Light and very rigid. Perfect for the top 
>>> driver for horns. I recall something about high speed of sound.
>>>     
>>>       
>> It is also used for mirrors for certain, usually classified,
>> applications.
>>
>>   
>>     
> One unclassified application is the 1.12m diameter secondary mirrors of
> ESO's 4 VLT telescopes in Chile.
>
>
> Bruce
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>   
For additional applications in some classified and unclassified programs:

http://www.mdatechnology.net/techprofile.aspx?id=175

An application for breyllium mirrors at  CERN:
http://cdsweb.cern.ch/record/944244?ln=no

Bruce




More information about the time-nuts mailing list