The microwave dielectric properties of (Ni, Zn)_0.5Ti_0.5NbO₄ solid solution

详细信息    查看全文

• 作者：Tiankai Chen ; Weibing Ma ; Qingchi Sun ; Cuicui Tang ; Zhengli Huan ; Benben Niu
• 关键词：Dielectric properties ; Ceramics ; Ni0.5Ti0.5NbO4 ; ZnTiNb2O8 ; Crystal composition
• 刊名：Materials Letters
• 出版年：15 December, 2013
• 年：2013
• 卷：113
• 期：Complete
• 页码：111-113
• 全文大小：689 K

文摘

To improve the microwave dielectric properties of Ni_0.5Ti_0.5NbO₄ ceramics, the Zn element was selected as the substitute for Ni site. The Ni_0.5鈭?em>xZn_xTi_0.5NbO₄ (x=0.10, 0.15, 0.20, 0.25) ceramics were synthesized by the conventional solid-state reaction method. When x was equal to 0.10, a single phase was obtained (Ni_0.5Ti_0.5NbO₄). Considering the similar parameter between the Zn and the Ni element, the single phase should be (Ni, Zn)_0.5Ti_0.5NbO₄ solid solution. But then with the increase of Zn content, the second phase (ZnTiNb₂O₈) appeared. The excellent microwave dielectric properties were obtained for Ni_0.5鈭?em>xZn_xTi_0.5NbO₄ ceramics (x=0.20) sintered at 1125 掳C for 4 h: 蔚_r=62.54, Q脳f=13,500 GHz, 蟿_f=+65 ppm/掳C. Under the premise of not deteriorating the Q脳f value, the dielectric constant was enhanced for Ni_0.5Ti_0.5NbO₄ ceramics by proper Zn doping for Ni site, which was relevant to the existence of (Ni, Zn)_0.5Ti_0.5NbO₄ solid solution.