ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract This paper describes the use of DTA, in conjunction with fibre softening point measurements, in determining suitable solder glass compositions for the manufacture of devitrifiable seals to conventional glasses. The range of compositions examined was: 0 to 17 Li2O; 21 to 44 Al2O3; 0 to 23 B2O3; 29 to 47 SiO2; 0 to 12 MgO; 0 to 24 Na2O; 0 to 22 K2O; and 0 or 17 P2O5 wt%. X-ray diffraction analysis of the devitrification products formed after heat treatment at the respective DTA main exotherm temperatures showed that, in most glasses, the major crystalline phase present had the β-eucryptite-type structure. Variations in the unit cell dimensions of this phase accompanied the changes in nominal glass compositions. In glasses containing large proportions of sodium oxide, the major devitrification product was of the nephelite type.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00550102
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