Structure and properties of certain glasses based on the PbO-B/sub 2/O/sub 3/ system

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:7240996

Ushakov, D F; Chekhovskii, V G; Volodkovich, V V

The mechanisms of the change of structure and properties of glasses based on the PbO-CuO-SiO/sub 2//sup -/B/sub 2/O/sub 3/ system as a function of their composition and conditions of thermal processing are investigated. Ranges of compositions of the glasses and their properties are shown in a table by the example of one of the compositions of each region. It is seen from IR spectra that the thermal processing of the glasses from the 2nd group leads to an improvement of resolution of the band 1150-1000 cm/sup -1/ and an increase of intensity of the band 550-400 cm/sup -1/. In the glasses of the 1st group, diborates are present and also boroxol, and possibly tetraborate groupings, which results from a comparison of the IR spectrum in the figure with the spectra of crystalline Li/sub 2/O X 2B/sub 2/O/sub 3/ and Na/sub 2/O X 4B/sub 2/O/sub 3/ (the structure of the latter is formed by tetraborate groupings) and vitreous B/sub 2/O/sub 3/, in which the majority of the BO/sub 3/ groups are combined in boroxol groupings. In the glasses of the third group, the BO/sub 3/ polyhedra are isolated from one another. Thus, the investigation has shown that whereas some properties are determined mainly by the structure of the boron-oxygen component, others depend significantly on other factors. The mechanisms established can be used for the development of new compositions of glasses with a specified set of properties.

• Research Organization: Lensovet Technological Institute, Leningrad
• OSTI ID: 7240996
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 58:4,PT.1; ISSN JAPUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
BORON
BORON COMPOUNDS
BORON OXIDES
BOROSILICATE GLASS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
EFFICIENCY
ELEMENTS
ENERGY EFFICIENCY
GLASS
HEAT TREATMENTS
INFRARED SPECTRA
LEAD COMPOUNDS
LEAD OXIDES
MELTING
METALLURGICAL EFFECTS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SEMIMETALS
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
ZONE MELTING