Abstract
Thermal properties and chemical compositions of glasses suitable for crystallization of ferro-electric Pb5Ge3O11 are described. The crystallization of lead germanate glass was investigated by DTA and X-ray diffraction. In the range from 62 to 62.5 of PbO in mole per cent, Pb5Ge3O11 was obtained as a single phase after a heat treatment. In the chemical composition around 5PbO·3GeO2 in the binary system of PbO-GeO2, Pb5Ge3O11 and two new phases of Pb3Ge2O7 and Pb3GeO5 were found to exist. The crystal structure of Pb3Ge2O7 had a hexagonal symmetry witha=10.16 Å andc=19.37 Å, and Pb3GeO5 was classified into orthorhombic system witha=4.85 Å,b=15.52 Å and c=11.77 Å.
Similar content being viewed by others
References
S. D. Stookey,Corning Research (1961) 178.
K. Sugii, H. Iwasaki andS. Miyazawa,Mat. Res. Bull. 6 (1971) 503.
H. Iwasaki,Appl. Phys. Japan 41 (1972) 415.
L. Merker andH. Wondratschek,Glastech. Ber. 30 (1957) 471.
E. I. Speranskaya,Izv. Akad. Nauk SSSR, Otdel. Khim. Nauk (1959) 162.
B. Phillips andM. G. Scroger,J. Amer. Ceram. Soc. 48 (1965) 398.
D. Gouju, J. Fournier andR. Kohlmuller,C. R. Acad. Sc. Paris, Ser. C 266 (1968) 1063.
D. Bordeaux,Bull. Soc. Fr. Mineral. Cristallogr. 92 (1969) 383.
M. Mydlar, H. Nowotny andJ. Seifert,Monatsh. Chem. 100 (1969) 191.
V. N. Morozov andN. N. Sharonova,Opt. Spektrosk. 26 (1969) 467.
V. N. Morozov,Zh. Prikl. Spektrosk. 11 (1969) 986.
G. Eulenberger, A. Wittmann andH. Nowotny,Monatsh. Chem. 93 (1962) 1046.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hasegawa, H., Shimada, M. & Koizumi, M. Phase relations and crystallization of glass in the system PbO-GeO2 . J Mater Sci 8, 1725–1730 (1973). https://doi.org/10.1007/BF02403523
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02403523