The surface tension of Bi 2O 3-B 2O 3-SiO 2 melts was measured using the ring method over the temperature range 973-1573 K. The composition and temperature dependences of the surface tension were investigated. The surface tension of Bi 2O 3-B 2O 3-SiO 2 melts showed a maximum near 60-70 mol% Bi 2O 3 and decreased with increasing B 2O 3/SiO 2 ratio at 1373 K. By assuming a linear relationship between the surface tension and the Bi 2O 3 content of binary silicate melts, the surface tension factor of Bi 2O 3 was determined to be 211 mN m -1 at 1373 K. The surface tension values calculated using the surface tension factor of each single component showed the largest deviation from the measured values when the Bi 2O 3 content was around 50-60% and were dependent on the B 2O 3 content. The temperature coefficient of surface tension had positive values at low Bi 2O 3 contents (less than 30-40 mol%) and negative values at high Bi 2O 3 contents.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry