| Title |
Effect of TiO2 Content on the Crystalline Growth and Hydrophobic Properties of Borophosphate Glass |
| Authors |
(Yoon Ki Jeong); (Il Gu Kim); (Bong Ki Ryu) |
| DOI |
https://doi.org/10.3365/KJMM.2016.54.6.461 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
amorphous materials; crystal growth; crystallization; thermal analysis |
| Abstract |
The effect of the TiO2 level in 30P2O5-30B2O3-40Na2O glasses on their crystallization kinetics and hydrophobic properties was investigated. The kinetic parameters, activation energy for crystallization (Ec), and Avrami constant (n) were evaluated under non-isothermal conditions using differential thermal analysis (DTA) performed for a range of heating rates. Each DTA curve exhibited one exothermic peak associated with the crystallization of the glass. X-ray diffractometry (XRD) analysis identified the crystalline phase as NaTi2(PO4)3. The calculated values of the local activation energies for the glass samples were obtained using the Kissinger and the Marotta methods. The hydrophobic properties as a function of the TiO2 content were identified by water contact angle goniometer. The results indicated that the water contact angle increased as the level of TiO2 increased. However, as crystallization progressed within the glass samples, the water contact angles decreased. (Received October 23, 2015) |