Influences of temperature and TiO2 amount on properties of Al2O3-based microwave ceramic materials

被引：0
|
作者：
Zhang X. [1 ]
Dong G. [1 ]
Han W. [1 ]
Lv Y. [1 ]
Ju H. [1 ]
机构：
[1] College of Materials Science and Engineering, North China University of Science and Technology, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Tangshan, 063009, Hebei
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2016年 / 44卷 / 09期
关键词：
Alumina ceramics; Densification; Microwave dielectric property;
D O I：
10.14062/j.issn.0454-5648.2016.09.04
中图分类号：
学科分类号：
摘要：
Alumina ceramics were prepared via normal pressure sintering in air with MgO-CuO-TiO2 as a doping agent. The effects of TiO2 doping content and sintering temperature on the microstructure, phase formation and dielectric properties of the alumina ceramics were investigated. The results show that the suitable content of TiO2 can promote the grain growth and densification of alumina ceramics. The relative density, microwave dielectric constant and the Q·f values of the sintered body firstly increase and then decrease as the TiO2 content increases. The relative density of alumina ceramics initially increases and then decreases as the temperature increases. The Al2O3 ceramic with TiO2 addition of 0.8% (in mass fraction) at 1 500℃ possesses superior comprehensive properties, the relative density of the sample is 97.89%, the dielectric constant is 9.89 and the Q·f value is 38 028 GHz. © 2016, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1276 / 1280
页数：4
相关论文
共 13 条
  • [1] Su H., Wu S.H., Studies on the (Mg, Zn)TiO<sub>3</sub>-CaTiO<sub>3</sub> microwave dielectric ceramics, Mater Lett, 59, 18, pp. 2337-2341, (2005)
  • [2] Anjana P.S., Joseph T., Sebastian M.T., Low temperature sintering and microwave dielectric properties of Ce<sub>2</sub>(WO<sub>4</sub>)<sub>3</sub> ceramics, Ceram Int, 36, 5, pp. 1535-1540, (2010)
  • [3] Freer R., Azough F., Microstructural engineering of microwave dielectric ceramics, J Eur Ceram Soc, 28, 7, pp. 1433-1441, (2008)
  • [4] Wan J.W.N., Abdullah H., Zulfakar M.S., Et al., ZnAl<sub>2</sub>O<sub>4</sub>-based microwave dielectric ceramics as GPS patch antenna: a review, Indian Ceram Soc, 72, 4, pp. 215-224, (2013)
  • [5] Shen C.H., Lin S.H., Pan C.L., Structure, dielectric properties, and applications of (Na<sub>0.5</sub>Sm<sub>0.5</sub>)TiO<sub>3</sub>-modified (Mg<sub>0.95</sub>Ni<sub>0.05</sub>)TiO<sub>3</sub> ceramics at microwave frequency, Mater Res Bull, 65, 1, pp. 169-174, (2015)
  • [6] Gao L., Hong J.S., Miyamoto H., Et al., Bending strength and microstructure of Al<sub>2</sub>O<sub>3</sub> ceramics densified by spark plasma sintering, J Eur Ceram Soc, 20, 12, pp. 2149-2152, (2000)
  • [7] Nordahl C.S., Messing G.L., Sintering of α-Al<sub>2</sub>O<sub>3</sub>-seeded nanocrystalline γ-Al<sub>2</sub>O<sub>3</sub> powders, J Eur Ceram Soc, 22, 4, pp. 415-422, (2002)
  • [8] Li J., Pan Y., Liu Y., Et al., J Chin Ceram Soc, 37, 2, pp. 270-274, (2009)
  • [9] Ma X., Yao X., Hua S., Et al., J Chin Ceram Soc, 37, 2, pp. 280-284, (2009)
  • [10] Liu Y., Research on the Low Temperature Sintering and Anisotropic Grain Growth of Alumina, (2006)
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