Germanate glasses

Kasik I., Lezal D., Karel M., Zavadil J. Germanate glasses doped with rare-earth, Proc. 5th ESG Conf. (1999), Prague, p. 151. 

Similar results have been reported for Eu3+ in glasses (J4) germanate glasses where the Eu3+ c.t. band is situated at 38462 cm i show a more intense forced-electric-dipole emission than phosphate glasses, where the c.t. band lies at 49020 cm i. These excimples illustrate the influence of the c.t. state upon the Eu3+ 4/- 4/ emission. 

Hirayama and Lewis (131) studied the fluorescent decay of the 3/2 state of neodymium in a very large number of alkali silicate and alkali germanate glasses. Data were taken by exciting a flat sample with a xenon... 

Fluorescent and Physical Properties of Neodymium-Doped Alkali Silicate and Germanate Glasses... 

A hard German glass tube, such as is generally employed ia organic analysis, is teken and drawn out in the form represented by a, J, e, in Fig. 369. 

Chemical Composition of some Old Glasses, Especially German Glass, 10th-18th Century, Glastechn. Ber. (1955) 28, 146. 

Table 6.8. O NMR parameters for metal silicate and germanate glasses.

The variation of MT p as a function of temperature for germanate glasses is shown in Figure 7.05. The vertical line separates approximately the high... 

Margaryan, A. and M. A. Piliavin, 1993, Germanate Glasses Structure, Spectroscopy and Properties (Artech House, Boston). 

The influence of the glass network former in phosphate, borate and germanate glasses and of the network modifier on the charge transfer spectra is described in ref. (64), and the values of Eu3+ and of the 4/ -> 5d transition of Tb3+ are presented in Table 3. As can be seen from this table the two quantities are influenced in the same manner by the network former of the glass. 

Absorption, emission and excitation spectra and quantum efficiencies of luminescence of bismuth in borax, phosphate and germanate glasses were obtained by Reisfeld and Boehm (70) and the spectral data are presented in Table 5. 

Using the k values so obtained and Eq. (38), h parameters for all mercury-like ions in phosphate, borax and germanate glasses were calculated and are given in Table 10. As can be seen from this table there is a regular increase in h on going from phosphate to ger-... 

Heavy ion Free ion 100% phosphoric acidb) Phosphate glass Borax glass Germanate glass kc)... 

Achtsnit, H.-D. Wegerhoff, W. Oral presentation at German Glass Forum Meeting, May 1990. 

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