Formation of resistor properties in glass-crystalline ruthenium materials by heat-treatment in a magnetic field

• Published in: Glass and ceramics 1992-03, Vol.49 (3-4), p.149-153
• Main Authors: ZHMYKHOV, G. V, LOZINSKII, N. S, BORUL'KO, V. I
• Format: Article
• Language: English
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Chemical industry and chemicals; Exact sciences and technology; Glasses; Structure, analysis, properties
• ISSN: 0361-7610; 1573-8515
• DOI: 10.1007/BF00676966

Thermomagnetic treatment is a promising method for producing new and improved glasses and glass-crystalline materials. However, the basic mechanisms of the interaction of a magnetic field with the structure of such materials needs to be understood before the method can be applied. During the formation of the structure of glass-crystalline materials, a magnetic field primarily affects the orientation of fragments of the molten glass matrix and the magnetically ordered phase, the crystallisation rate in the amorphous phase under non-equilibrium conditions and the reaction rate of the glass matrix itself, the crystalline and amorphous components, etc. Lead silicate and lead borosilicate glasses with a magnetically sensitive filler, lead ruthenate and ruthenium dioxide, were studied. Thermomagnetic treatment of pastes was carried out. The effect of the magnetic field (samples treated at 298-1273 K in a field of 0.6 T) on the resistivity, temperature coefficient of resistivity and chemical interaction between filler and glass was examined. It was shown that a magnetic field affects the interaction between oxide compounds of ruthenium (IV) and borosilicate glass matrices, and hence the formation of resistor properties in glass-crystalline ruthenium materials. 9 refs.