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Journal of Inorganic Materials

Journal of Inorganic Materials >

2010 , Vol. 25 >Issue 3: 332 - 336

DOI: https://doi.org/10.3724/SP.J.1077.2009.09527

Research Letter

Study on the (1-x)(Mg0.7Zn0.3)TiO3－x(Ca0.61Nd0.26)TiO3 Microwave Dielectric Ceramics

  • LU Zheng-Dong ,
  • SHEN Chun-Ying ,
  • LI Liang，YANG Jian ,
  • QIU Tai
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  • College of Materials Science and Engineering，Nanjing University of Technology，Nanjing 210009，China

Received date: 2009-07-23

  Revised date: 2009-11-04

  Online published: 2010-03-20

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Abstract

The microwave dielectric properties of the (1-x)(Mg0.7Zn0.3)TiO3－x(Ca0.61Nd0.26)TiO3(MZCNT) system were investigated. The system was prepared using a conventional solidstate ceramic route. The objective of the present work is to compensate for the negative temperature coefficient of resonant frequency (τf) of (Mg0.7Zn0.3)TiO3 by the addition of (Ca0.61Nd0.26)TiO3. The microwave dielectric properties are strongly correlated with the sintering temperature and the composition. Very dense MZCNT ceramics were synthesized by sintering at 1250℃, when sintered at temperatures above 1300℃, the decomposition of (Ca0.61Nd0.26)TiO3 and evaporation of Zn resulted the decrease in density and degradation in dielectric properties. With increasing (Ca0.61Nd0.26)TiO3, the dielectric constant (εr) increased and the quality factor Q×f decreased. For practical application, 0.87(Mg0.7Zn0.3)TiO3－0.13(Ca0.61Nd0.26)TiO3 ceramics sintered at 1250℃ with a dielectric constant εr～24.3, a Q×f value of 34000GHz and a temperature coefficient of resonance frequency (τf) of -9×10-6/℃ is proposed in this paper.

Key words： (1-x)(Mg0.7Zn0.3)TiO3－x(Ca0.61Nd; dielectric constant; quality factor; temperature stable resonant frequency

Cite this article

LU Zheng-Dong , SHEN Chun-Ying , LI Liang，YANG Jian , QIU Tai . Study on the (1-x)(Mg0.7Zn0.3)TiO3－x(Ca0.61Nd0.26)TiO3 Microwave Dielectric Ceramics[J]. Journal of Inorganic Materials, 2010 , 25(3) : 332 -336 . DOI: 10.3724/SP.J.1077.2009.09527

References

［1］Long S A, Mcallister M W, Shen L C. The resonant cylindrical dielectric cavity antenna. IEEE Trans., 1983,31(3): 406-412.

［2］Wersing W. Microwave ceramics for resonators and filters. Curr.Opin.Solid State Mater.Sci., 1996,1(5):715-731.

［3］Huang C L, Weng M H. Improved high Q value of MgTiO3-CaTiO3 microwave dielectric ceramics at low sintering temperature. Mater. Res. Bull., 2001,36(15): 2741-2750.

［4］Cho W W, Kakimoto K, Ohsato H. High-Q microwave dielectric SrTiO3doped MgTiO3 materials with near-zero temperature coefficient of resonant frequency. Jpn. J. Appl. Phys., 2004,43(9A):6221-6224.

［5］Li L, Shen C Y, Qiu T. Studies on microwave dielectric properties of (Mg1-xZnx)TiO3 system ceramics. Electronic components and materials, 2008, 27(10):38-40.

［6］Huang C L, Tasi J T, Chen Y B. Dielectric properties of (1-y)Ca1-xLa2x/3TiO3-y(Li,Nd)1/2TiO3 ceramic system at microwave frequency. Mater. Res. Bull., 2001, 36(3): 547-556.

［7］Hakki B W, Coleman P D. A dielectric resonator method of measuring inductive capacities in the millimeter range. IEEE Trans. Microwave Theory Technol., 1960,8(4): 402-410.

［8］Kobayshi Y, Katoh M. Microwave measurement of dielectric properties of lowloss materials by the dielectric rod resonator method. IEEE Trans. Microwave Theory Technol., 1985,33(7): 586-592.

［9］Tseng C F, Huang C L, Yang W R, et al. Dielectric characteristics of Nd(Zn1/2Ti1/2)O3 ceramics at microwave frequencies. J. Am. Ceram. Soc., 2006,89(4): 1465-1470.

［10］Huang C L, Tseng C F, Chen Y B, et al. New dielectric material system of (Mg0.95Zn0.05)TiO3-Ca0.61Nd0.26TiO3 at microwave frequency. J. Alloy. Comp., 2008,453(1): 337-340.

［11］Huang C L, Pan C L, Hsu J F. Dielectric properties of (1-x)(Mg0.95Co0.05)TiO3－xCaTiO3 ceramic system at microwave frequency. Mater. Res. Bull., 2002,37(15): 2483-2490.

［12］Huang C L, Chen Y B, Lo C W. New dielectric material system of La(Mg1/2Ti1/2)O3-CaTiO3 at microwave frequencies. Jpn. J. Appl. Phys., 2005,44(5A): 3147-3150.

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