The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Structural and Dielectirc Properties of $Ba_{0.5}Sr_{0.5}TiO_3$ Thick Films Doped with MgO

MgO가 첨가된 $Ba_{0.5}Sr_{0.5}TiO_3$ 후막의 구조 및 유전 특성

  • 강원석 (광운대학 전자재료공학과) ;
  • 남성필 (광운대학 전자재료공학과) ;
  • 고중혁 (광운대학 전자재료공학과) ;
  • 이성갑 (경상대학 세라믹공학과) ;
  • 이영희 (광운대학 전자재료공학과)
  • Published : 2006.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

Using the $Ba_{0.5}Sr_{0.5}TiO_3$(BST) powders prepared by the Sol-Gel method, the BST thick films were fabricated on the $Al_2O_3 $substrates coated with Pt by the screen printing method. Compared with pure BST thick films, the structural and dielectric properties of the BST thick films doped with $1{\sim}10$ wt % MgO were investigated. It was observed that the Mg substitution into BST causes a shift in the cubic-tetragonal BST phase transition peak to a lower temperature. The microstructure of the BST substituted with Mg was homogeneous and dense. Mg substitution into BST had a significant effect on the grain size reduction. Dielectric constant was decreased with increasing the MgO content and temperature. In the case of BST thick films doped with 1 wt% MgO, the relative permittivity and dielectric loss were 1581 and 1.4 % at 1 MHz.

Keywords

References

  1. Sea-Fue Wang, Jinn P. Chu, Chen Chun Lin, T. Mahalingamb, 'Dielectric properties and microstructure of nano-MgO dispersed $Ba_{0.3}Sr_{0.7}Ti0_3$ thin films prepared by sputter deposition' J Appl, Phys, Vol. 98, 014107, 2005 https://doi.org/10.1063/1.1947390
  2. Young-Ah Jeon, Eun-suck Choi, tae-suck Sea and Soon-Gil Yoon, 'improvements in Tunability of ($Ba_{0.5}Sr_{0.54}Ti0_3$) thin films by use of metalorganic chemical vapor depositied (Ba,Sr)$RuO_3$ interfacial layers' Appl, Phys, Lett., Vol. 79, pp. 1012-1014, 2001 https://doi.org/10.1063/1.1394723
  3. Howard Diamond, 'Variation of permittivity with Electric Field in perovskite Like Ferroelectrics', J. Appl. Phys., Vol. 32, pp 909-915, 1961 https://doi.org/10.1063/1.1736132
  4. Long wu, Yih-Chein Chen, Yi Ping Chou, Yuan-tu Tsai and Cheng-Yuan Chu, 'Dielectric properties of $Al_{2}O_{3}$-doped Barium Strontium Titanate for Application in Phased Array Antennas', Jpn. J Appl. Phys., Vol. 38, pp.5154-5161, 1999 https://doi.org/10.1143/JJAP.38.5154
  5. Jih-Wei Liou, Bi-Shiou Chiou, 'Dielectric properties of $Al_{2}O_{3}$-doped Barium Strontium titanate for Application in Phased Array Antenas', J. Mat. Sci.: Mater. in Elecr., Vol. 11, pp. 645-651, 2000 https://doi.org/10.1023/A:1008949316917
  6. Jih-Wei Liou, Bi-Shiou Chiou, 'Dielectric properties of $Al_{2}O_{3}$-doped Barium Strontium titanate for Application in Phased Array Antenas', Jpn. J. Appl, Phys., Vol. 36, pp. 4359-4368, 1997 https://doi.org/10.1143/JJAP.36.4359
  7. Palkar, V. R,Purandare, S. C,Pinto, R, 'Ferroelectric thin films of PbTiO3 on silicon' Journal of physics. D, Applied physics, Vol.. 32, No.1, 1999 https://doi.org/10.1088/0022-3727/32/1/001
  8. Park, Sang-Shik,Yang, Cheol-Hoon, 'Characterization of ferroelectric $SrBi_2Ta_2O_9$ thin films deposited by a radio frequency' Journal of the Electrochemical Society, Vol. 144, No.8, 1997
  9. K.D. Budd. S.U. Dye and D.A. Payne, 'Sol-Gel Processing of $PbTiO_3$, $PbZrO_3$, PZT, PZLT Thin Film', Brit. Ceram. Proc., Vol. 36, p. 107, 1985
  10. Wontae Chang, Louise Sengupta, 'MgO-mixed $Ba_{0.6}Sr_{0.4}TiO_3$ bulk ceramics and thin films for tunable microwave applications', J. Appl. Phys., Vol. 92, No.7 pp.3941-3946, 2002 https://doi.org/10.1063/1.1505669
  11. L. Radhapiyari Devi and Chandara Prakash, 'Dielectric Properties of Mg doped $Ba_{0.7}Sr_{0.3}TiO_3$' International Conference on Smart materials Structures and System, ps-22-25, 2005