International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2557

Full Length Research Paper

Glass-forming tendency in the K2O-BaO-B2O3-Al2O3-TiO2 system

María Azucena González Lozano1*, Alexander  Gorokhovsky2, José Iván Escalante García3, Patricia Ponce Peña1,  Miguel Ángel Escobedo Bretado1, Edgar López Chipres1 and Virgilio Mojica Marín1
  1Facultad de Ciencias Químicas. Universidad Juárez del Estado de Durango. Av. Veterinaria s/n, Circuito Universitário. Col. Valle del Sur. CP. 34200. Durango, Dgo. México. 2Saratov State Engineering University, ul. Politechnicheskaya 77, Saratov, 410054 Russia. 3Centro de Investigación y de Estudios Avanzados, Carretera Saltillo-Monterrey km. 13.5. AP. 663. CP. 25000 Saltillo, Coah., México.
Email: [email protected]

  •  Accepted: 05 December 2011
  •  Published: 30 December 2011



Vitrification in the system of K2O-BaO-B2O3-Al2O3-TiO2 containing (mol%): K2O (0 to 28), BaO (0 to 28), B2O3 (5 to 24), Al2O3 (7 to 25) and TiO2 (33 to 60) was investigated by fusion at 1450°C for 2 h. The fields of vitrification were analyzed with different forms of diagrams. It is shown that stable glasses can be produced with batchs containing 62 to 75 mol% of glass-formers ([TiO2]+[B2O3]+[Al2O3]) including (TiO2) up to 48 mol% and (R2O3)>20 mol%. For those compositions with (TiO2)=35 to 47 mol%, the molar ratio of (Al2O3) / (B2O3) can be varied in the range of 1 to 2.5. The structure of obtained glasses was characterized by scanning electron microscope (SEM) and infrared (IR); the investigated glasses contained one or two vitreous phases depending on their chemical composition. One-phase glasses can be obtained with compositions of (Al2O3) / (B2O3)≥1.75. The vitreous phase of one-phase glasses and the main glassy phase of two-phase glasses are formed by octahedra of TiO6/2 and AlO6/2 as well as (B3O6)3- rings; the droplets of the second vitreous (borate) phase was formed by BO3/2, TiO4/2 and BO4/2-, AlO4/2- groups combined with Ba2+ and K+ cations.


Key words: Vitrification, borate, titanate, two-phase glasses.