ZHOU Hongping, ZENG Renjie
(College of Materials, Xiamen University, Xiamen Fujian 361005, China)
Abstract:ZnO-Bi2O3-B2O3 glasses containing CuO were prepared by melt-quenching route. Effects of CuO on the structure,glass transition temperature (Tg), crystallization, sinterability and fluidity of the basic glasses were studied by employing FTIR,DTA, DIL (dilatometer) and XRD, and by measuring the ratio of the shrinkage, respectively. FT-IR analysis showed thatas the content of CuO was increased, the stretching vibration band of [ZnO4] and [BiO6] moved from 517 cm-1 to 523 cm-1,and there were [BO3] units and relatively small amount of [BO4] unites in the glasses. DTA analysis indicated that adding0.5wt.% CuO into the basic glasses resulted in the follows: 447 ℃ of Tg and 820 ℃ of the second crystallization temperature(Tc2) for the glasses were kept constant, while the first crystallization temperature (Tc1) of the glasses decreased from 604 ℃to 523 ℃, which corresponded to XRD analysis results: the diffraction peaks of the glasses with added CuO were more remarkable. With a small amount of CuO added into the glasses, both sintering ability and fluidity of the sample were improved
Keywords:lead-free, bismuth, glass ceramics, sintering, fluidity