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A ceramic material of low thermal expansivity

Publisher
Elsevier Science
Year
1932
Tongue
English
Weight
96 KB
Volume
213
Category
Article
ISSN
0016-0032

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The linear thermal expansion coefficient, a, has been measured from 2 to 32 K and from 55 to 90 K for a machineable glass-ceramic, an "ultra-low expansion" titanium silicate glass (Coming ULE), and ceramic glasses (Cer-Vit and Zerodur), and for glassy carbon, a is negative for the ultra-low expansio

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A new perovskite material has been found, Pb (Mn,/, 7"8t/=)0 3 which has the smallest thermal diffusivity of any known, densified solid at low temperatures (9 x 10 -3 < k < 5 X 10 -2 cm 2 sec -1 between 4-10 K). This results from a large specific heat (~ 12.1J cm -3 K -1 at 10 K) and small thermal c