Re: [ATM] Quartz blanks

["Vladimir Galogaza" <vladimir.galogaza@zg.htnet.hr>]

Bernard,

>can anyone here give a specs comparison between quartz and Zerodur?

Here is something I have:
                                               Zerodur             Fused
Silica
Density g/ccm                           2.53                    2.202
Young Modulus MPa             90600                 73000
Poisson's Ratio                       0.24                     0.17
CTE Per deg C                       2-4 *10^-8        5.2*10^-7



Mean coefficient of linear thermal expansion (0-50 deg C temp range)
(From SCHOTT catalog for Zerodur)
There are 3 classes:
Expansion class 0          0+/- 0.02 *10^-6/K
                 class 1         0+/- 0.05
                class 2          0+/- 0.10

Regards
Vladimir.





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