STUDIES RELATED TO CRYSTALLIZATION OF GERMANATE GLASSES. I. PHASE RELATIONS IN THE SYSTEM PBO-GEO2

STUDIES RELATED TO CRYSTALLIZATION OF GERMANATE GLASSES. I. PHASE RELATIONS IN THE SYSTEM PBO-GEO2

Phase relations in the system PbO-GeO2 have been determined using the quenching technique. Five compounds were detected with compositions as follows: 4PbO.GeO2, 3PbO.2GeO2, PbO.GeO2, PbO.2GeO2, and PbO.4GeO2. The 3:2 and 1:1 compounds melt congruently at 744 and 799 C respectively. The 4:1 compound...

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Bibliographische Detailangaben
Hauptverfasser: Phillips,Bert, Scroger,Margaret G
Format: Report
Sprache:eng
Schlagworte:
EUTECTICS
GLASS
INFRARED SPECTRA
LEAD COMPOUNDS
MELTING
MICROSCOPY
OXIDES
QUENCHING
STABILITY
TEMPERATURE
TRANSITION TEMPERATURE
X RAY DIFFRACTION
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Zusammenfassung:Phase relations in the system PbO-GeO2 have been determined using the quenching technique. Five compounds were detected with compositions as follows: 4PbO.GeO2, 3PbO.2GeO2, PbO.GeO2, PbO.2GeO2, and PbO.4GeO2. The 3:2 and 1:1 compounds melt congruently at 744 and 799 C respectively. The 4:1 compound melts incongruently at 726 C to PbO plus liquid, whereas the 1:4 compound melts incongruently to GeO2 plus liquid at 790 C. The 1:2 compound has a very narrow temperature range of stability between 707 and 730 C. (Author)