The structure of vanadate glass-ceramics containing BaTiO3.

The structure of vanadate glass-ceramics doped with BaTiO3 was measured by SEM technique. Samples of the composition of x[BaO,TiO2]–(80 − x)V2O5–20Bi2O3 where x = 5, 10 and 15 in mol% were prepared by a conventional melt quenching technique. The melting was performed in alumina crucibles at the temperature of 1273 K–1373 K. The melts were poured on a preheated (573 K) brass plate and pressed by another plate. A subset of as-quenched samples was heat treated in air at the temperature of 633 K (close to the crystallization temperature) for 6 h and cooled with the furnace. The chemical compositions of the glasses were determined by energy‐dispersive Xray spectrometer (EDX GENESIS Apex Apollo X60 spectrometer, Mahwah, NJ, USA) analysis, using a scanning electron microscope (SEM), FEI Company Quanta FEG250 (FEI, Eindhoven , The Netherlands). SEM observations were done with a SE‐ETD detector (secondary electron—Everhart–Thornley detector) using a 20 kV beam accelerating voltage and under the high vacuum (pressure 10−4 Pa). Samples were freshly fractured before measurements. Detailed information can be found in: http://dx.doi.org/10.1016/j.jnoncrysol.2014.01.008采用扫描电子显微镜（Scanning Electron Microscope，SEM）技术表征了掺钛酸钡（BaTiO3）的钒酸盐微晶玻璃的微观结构。本研究通过传统熔融淬火法制备了组分表达式为x[BaO,TiO2]–(80 − x)V2O5–20Bi2O3的样品，其中x的摩尔分数取值为5、10和15。熔融过程于氧化铝坩埚中进行，温度区间为1273 K至1373 K。将熔融液浇铸至预热至573 K的黄铜板上，并用另一块钢板加压成型。取部分淬火态样品置于空气中，在接近结晶温度的633 K下保温6 h，随后随炉冷却。采用荷兰埃因霍温FEI公司Quanta FEG250型扫描电子显微镜，搭配美国新泽西州马瓦市EDX GENESIS Apex Apollo X60型能量色散X射线光谱仪（energy‐dispersive X-ray spectrometer，EDX），对玻璃样品的化学成分进行了测定。SEM观测采用SE‐ETD探测器（二次电子—埃弗哈特-索恩利探测器，secondary electron—Everhart–Thornley detector），加速电压为20 kV，测试环境为高真空（压强10⁻⁴ Pa）。测试前，样品均经新鲜断裂处理。详细信息可参见：http://dx.doi.org/10.1016/j.jnoncrysol.2014.01.008