Transparent AlON ceramic combined with VO2 thin film for infrared and terahertz smart window-猫眼课题宝

透明AlON陶瓷结合VO2薄膜用于红外和太赫兹智能窗

DOI：

10.1016/j.ceramint.2018.04.205

发表时间：

2018-08

期刊：

Ceramics International

影响因子：

5.2

通讯作者：

中科院分区：

材料科学1区

文献类型：

作者：

Peng Bo;Shi Qiwu;Huang Wanxia;Wang Shanshan;Qi Jianqi;Lu Tiecheng

Transparent AlON ceramics are intriguing window materials with excellent mechanical strength and superb optical transparency from the near ultraviolet to the mid-infrared range. However, previous studies focused their investigations in the visible range; therefore, the application of transparent AlON ceramics to tunable windows has yet to be reported. In this work, a VO2thin film with a characteristic semiconductor-metal phase transition (SMT) was fabricated on a transparent AlON ceramic, which exhibited remarkable tunable switching properties in the infrared and terahertz ranges. The transparent AlON ceramic was prepared by a two-step method, which included carbothermal reduction and pressureless sintering. The resulting ceramic exhibited high transparency of over 70% in the visible-infrared range and a notable THz transmission of 64.5–73.9% at 0.1–1.5 THz. The VO2thin film was prepared on a transparent AlON ceramic using the sol-gel method and showed excellent optical and electric switching performance. The square resistance variance was close to four orders of magnitude, and an infrared switching ratio of over 40% was obtained. Furthermore, the combined structure showed an efficient THz switching ratio of approximately 70.9%. This study proposes a composite material combined with a transparent ceramic and a phase transition oxide and provides great insights into their application in infrared and terahertz smart windows as well as in switching devices.