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Properties and Morphology of Barium Germanate Glasses

1984; Wiley; Volume: 67; Issue: 8 Linguagem: Inglês

10.1111/j.1151-2916.1984.tb19170.x

1551-2916

James E. Shelby,

Recycling and utilization of industrial and municipal waste in materials production

The density, thermal expansion behavior, and transformation‐range viscosity of barium germanate glasses containing 0 to 9 mol% BaO were measured. The addition of BaO to Ge0 2 resulted in phase separation at all BaO concentrations. The results of the property measurements indicate that glasses containing up to 3 mol% BaO consist of a matrix of essentially pure GeO 2 with barium‐rich droplets. Glasses containing 6 mol% BaO or more consist of two interconnected vitreous phases. The morphology of glasses containing between approximately 3.5 and 5.5 mol% BaO can be altered from the droplet/matrix form to that of two continuous phases by the appropriate heat treatment.