X-ray diffraction studies of phase transformations in heavy-metal fluoride glasses

1985 ◽  
Vol 20 (8) ◽  
pp. 2794-2800 ◽  
Author(s):  
Narottam P. Bansal ◽  
Robert H. Doremus
Keyword(s):  
Heavy Metal ◽  
Phase Transformations ◽  
Metal Fluoride ◽  
X Ray Diffraction ◽  
Fluoride Glasses ◽  
X Ray ◽  
Heavy Metal Fluoride ◽  
Heavy Metal Fluoride Glasses

Reactive atmosphere synthesis of sol-gel heavy metal fluoride glasses

1992 ◽  
Vol 7 (6) ◽  
pp. 1534-1540 ◽  
Author(s):  
A.M. Mailhot ◽  
A. Elyamani ◽  
R.E. Riman
Keyword(s):  
Heavy Metal ◽  
Sol Gel ◽  
Fluoride Glass ◽  
Metal Fluoride ◽  
X Ray Diffraction ◽  
Combustion Analysis ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Heavy Metal Fluoride ◽  
Heavy Metal Fluoride Glasses

A glass based on ZrF4 was synthesized by a combination of sol-gel and reactive atmosphere processing. Infrared spectroscopy and combustion analysis show that the fluorination process reduces the concentration of organic and hydroxide impurities. Chemical changes have occurred during fluorination; this is indicated by different x-ray diffraction traces and crystallization characteristics for the fluorinated sample compared to the oxide gel product. Chemical analysis from x-ray fluorescence indicates that the fluorinated gel is chemically similar to a melted glass of the same composition. Differential scanning calorimetry gives a glass transition temperature of 290 °C and a crystallization temperature of 390 °C. These values are consistent with those expected for a fluoride glass prepared by conventional methods.

Evidence for Local Atomic Strain in Pb-Doped Heavy-Metal Fluoride Glasses

1995 ◽  
Vol 417 ◽  
Author(s):  
L. Niu ◽  
A. R. Kortan ◽  
N. Kopylov ◽  
P. H. Citrin
Keyword(s):  
Heavy Metal ◽  
Structural Changes ◽  
Dopant Concentration ◽  
Metal Fluoride ◽  
Fluoride Glasses ◽  
X Ray ◽  
Heavy Metal Fluoride ◽  
Heavy Metal Fluoride Glasses ◽  
X Ray Absorption ◽  
Present Understanding

AbstractNear-edge and extended x-ray absorption fine structure (NEXAFS and EXAFS) measurements have been made as a function of Pb dopant concentration to study the changes in local geometric and electronic structure in several heavy-metal fluoride glasses (Zr/Ba/La/Al/Na, or ZBLAN). A strong correlation is found between the observed glass instability for Pb concentrations > 10% and the structural changes that are measured exclusively around the Ba atoms. Implications of these novel findings are examined in light of the present understanding of these complex glass systems.

Heavy Metal Fluoride Glasses. New Developments

1984 ◽  
Author(s):  
Jacques Lucas ◽  
Denis Tregoat ◽  
Ahmed El Houari ◽  
Gilles Fonteneau
Keyword(s):  
Heavy Metal ◽  
Metal Fluoride ◽  
New Developments ◽  
Fluoride Glasses ◽  
Heavy Metal Fluoride ◽  
Heavy Metal Fluoride Glasses

Electrochemical purification of heavy metal fluoride glasses for laser-induced fluorescent cooling applications

1997 ◽  
Vol 213-214 ◽  
pp. 95-100 ◽  
Author(s):  
J.C. Fajardo ◽  
G.H. Sigel ◽  
B.C. Edwards ◽  
R.I. Epstein ◽  
T.R. Gosnell ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Fluoride ◽  
Fluoride Glasses ◽  
Heavy Metal Fluoride ◽  
Heavy Metal Fluoride Glasses

Light scattering in heavy-metal fluoride glasses in infra-red spectral region

1986 ◽  
Vol 22 (3) ◽  
pp. 117 ◽  
Author(s):  
D.C. Tran ◽  
K.H. Levin ◽  
R.J. Ginther ◽  
G.H. Sigel ◽  
A.J. Bruce
Keyword(s):  
Heavy Metal ◽  
Light Scattering ◽  
Spectral Region ◽  
Metal Fluoride ◽  
Fluoride Glasses ◽  
Infra Red ◽  
Heavy Metal Fluoride ◽  
Heavy Metal Fluoride Glasses
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