复合持续时间对P_(2)O_(5)-Al_(2)O_(3)异相复合玻璃结构和力学性能的影响  

Effect of Recombination Time on the Structure and Properties of P_(2)O_(5)-Al_(2)O_(3) Heterogeneous Composite Glass

作　　者：朱钦塨 赵高凌[1] 韩高荣[1] ZHU Qingong;ZHAO Gaoling;HAN Gaorong(State Key Laboratory of Silicon Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学材料与工程学院,硅材料国家重点实验室,杭州310027

出　　处：《无机材料学报》2023年第2期170-176,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金重点项目(52072335)。

摘　　要：近年来,分相玻璃以其独特的结构以及优异的物理化学性质引起了广泛关注。本研究结合气动雾化加料和机械搅拌,采用熔融冷却法制备了纳米SiO_(2)-Na_(2)O高硅玻璃颗粒增强的P_(2)O_(5)-Al_(2)O_(3)玻璃。通过改变复合持续时间,研究了玻璃的结构与力学性能之间的关系。结果表明,异相复合玻璃的杨氏模量高于P_(2)O_(5)-Al_(2)O_(3)玻璃,并且随着复合持续时间由10 s增大到8 min,玻璃的杨氏模量呈现先升高后降低的趋势,在复合持续时间为6 min时,杨氏模量达到最大值80.7 GPa。相比于P_(2)O_(5)-Al_(2)O_(3)玻璃,杨氏模量提高了18%。引入SiO_(2)-Na_(2)O高硅玻璃颗粒不仅能够在基体玻璃中形成第二相,而且会改变P_(2)O_(5)-Al_(2)O_(3)玻璃的结构。随着复合持续时间由10 s增大到6 min,异相复合玻璃网络中磷的配位数逐渐增大,并且玻璃网络中的非桥氧数量逐渐减少,网络交联度逐渐增加。而复合持续时间超过8 min,则不利于网络交联度的增加。异相复合玻璃的开发为耐损伤玻璃材料的制备提供了新的思路。In recent years,phase separation glass has attracted extensive attention because of its unique structure and excellent properties.But its mechanism of phase separation on glass remains insufficient clear,especially,the influence of recombination time on structure and properties is unclear.Here,strengthened P_(2)O_(5)-Al_(2)O_(3)glass with SiO_(2)-Na_(2)O high-silicate glass particles as the second phase was prepared by melting-quenching method combined with pneumatic atomization and mechanical stirring.The relationship between structure and mechanical properties of the glass was investigated by varying the recombination time.Experiment results showed that Young's modulus of the heterogeneous composite glass was higher than that of the P_(2)O_(5)-Al_(2)O_(3)glass.Young's modulus of the sample firstly increased and then decreased with the recombination time increasing from 10 s to 8 min.The highest Young's modulus of 80.7 GPa was obtained at recombination time of 6 min,which was increased by 18%as compared with the P_(2)O_(5)-Al_(2)O_(3)glass.Introducing SiO_(2)-Na_(2)O high-silicate glass particles not only formed the second phase in the matrix glass,but also changed the structure of the P_(2)O_(5)-Al_(2)O_(3)glass.As the recombination time increases from 10 s to 6 min,coordination number of phosphorus in heterogeneous composite glass network gradually increases,while amount of non-bridging oxygen in the glass network gradually decreases,resulting in a gradual increase in network cross-linking.However,when the recombination time is more than 8 min,it is not conducive to network crosslinking.Therefore,development of het-erogeneous composite glass can provide a new route for the preparation of glass materials with good damage resistance.

关 键 词：异相复合玻璃 P_(2)O_(5)-Al_(2)O_(3)玻璃 杨氏模量 复合持续时间 

分 类 号：TQ171[化学工程—玻璃工业]