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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Influence of TiO2 content on the structure and crystallization of CuO-TiO2-P2O5 glasses and the derived porous glass-ceramics
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Influence of TiO2 content on the structure and crystallization of CuO-TiO2-P2O5 glasses and the derived porous glass-ceramics

机译：TiO2含量对CuO-TiO2-P2O5玻璃结构和结晶的影响及衍生多孔玻璃 - 陶瓷

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Glass samples with a composition of (70-x)CuO-xTiO(2)-30P(2)O(5) (x = 10, 15, 20, 25 and 30 mol%) were prepared by melt quench method. The FTIR spectra suggest that the glass network becomes compact with the increase of TiO2. The XRD and DTA analysis indicate that the sample with a high content of TiO2 shows increasing tendency to crystallization. All samples were subjected to controlled heat treatments at temperatures set according to the DTA results. The main crystalline phases are Cu-3(PO4)(2), CuTi2(PO4)(3), besides that Cu2P2O7 and CuO phases crystallized in the samples containing 10 and 15 mol% TiO2. Porous bulky skeletons composed of nano-sized spherical CuTi2(PO4)(3) particles were formed after acid treatments of the controlled crystallized samples in H2SO4 solution due to the selective leaching of the crystalline phase(s). The interparticle voids contribute to the meso-and macro-porosity revealed by the N-2-sorption and SEM measurements. The results show that the sample containing 15 mol% TiO2 has the largest BET surface area and pore volume of 25.7 m(2)/g and 0.29 cm(3)/g, respectively, mainly due to the largest amount of Cu-3(PO4)(2) in the crystallized sample, which resulted in the lowest aggregation, smallest particle size of the CuTi2(PO4)(3) nano-particles consisting of the final porous glass-ceramic.
机译：玻璃样品（70-X）的CuO-xTiO（2）-30P（2）O（5）（X = 10，15，20，25和30摩尔％），通过熔融骤冷法制备的组合物。红外光谱表明玻璃网络变得紧致有TiO 2的增加。 XRD和DTA分析表明，与二氧化钛的示出了高含量的样品增加的趋势，以结晶。设置为根据DTA结果所有样品进行温度控制的热处理。主晶相是Cu-3（PO 4）（2），CuTi2（PO 4）（3），除此之外Cu2P2O7和CuO相含有10至15摩尔％的TiO 2的样品中结晶。纳米尺寸的球形CuTi2（PO 4）组成的多孔骨架笨重（3）的颗粒在硫酸溶液中的受控结晶的样品的酸处理后形成由于结晶相（多个）的选择性浸出。颗粒间空隙有助于由N-2-吸附和SEM测量显示内消旋和宏观孔隙度。结果表明，含有15摩尔％的TiO 2的样品具有最大的BET表面积和25.7米孔体积（2）/克和0.29厘米（3）/ g以下，分别主要是由于铜-3的量最大（ PO4）（2）结晶的样品中，这导致在最低的聚集，所述CuTi2（PO 4）（由最终的多孔玻璃 - 陶瓷的3）的纳米颗粒的最小粒径。

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