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Showing 1 to 4 of 4 for “"Vitreous silica"”.
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The effect of neutron irradiation on the density of low-energy excitations in vitreous silica
… velocity have been made on a single piece of vitreous silica. These measurements were repeated after fast neutron irradiation of the material. It was found that the irradiation produced changes of the same relative magnitude in the low-temperature excess specific heat C , the thermal …
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Deoxidation studies : The interaction of vitreous silica with molten aluminium and systems of aluminium, manganese, iron and silicon.
The interaction of aluminium with silica and silicates isthermodynamically inevitable and leads to reaction effects in many systems. The resultant reactions can continue over a wide temperature range including both liquid and solid state systems such as molten aluminium handling units and the heat …
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Low-temperature thermal expansion of amorphous solids
… of measurements performed. on two types of vitreous silica, two amorphous polymers, As2S3 and Zr02 : Y 203 is presented in the context of the phenonenclogical tunneling-states model Consistency in explanation of thermal expansion and ultrasonic behavior maintained by assuming a broad, weakly …
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Dynamic Properties of Materials: Phonons from Neutron Scattering
… powder spectroscopy study of cristobalite and vitreous silica demonstrating that the Bose peak and so-called `fast sound' features can be derived from standard lattice dynamics in both the crystal and the amorphous counterpart, and allowing discussion of their origins. Given the controversy in …