한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제39권9호
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  • Pages.846-850
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  • 2002
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지
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PMN-PT-BT/Ag 복합체 제조 및 기계적, 유전적 특성

Preparation of PMN-PT-BT/Ag Composite and its Mechanical and Dielectric Properties

  • 임경란 (한국과학기술연구원 재료연구부) ;
  • 정순용 (고려대학교 재료공학과) ;
  • 김창삼 (한국과학기술연구원 재료연구부) ;
  • 남산 (고려대학교 재료공학과)
  • Lim, Kyoung-Ran (Division of Materials Science and Engineering, KIST) ;
  • Jeong, Soon-Yong (Department of Materials Science and Engineering, Korea University) ;
  • Kim, Chang-Sam (Division of Materials Science and Engineering, KIST) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
  • 발행 : 2002.01.01
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초록

강유전체 물질인 PMN-PT-BT의 기계적 특성을 향상시키기 위한 Ag와의 복합체 제조를 MgO 졸로 분말 표면을 코팅하여 소결시 Ag의 이동을 제어하는 방법으로 시도하였다. PbO, $Nb_2O_5,\;TiO_2,\;BaCO_3$와 MgO 대신 $Mg(NO_3)_2$을 사용하여 볼밀로 혼합한 후, 건조된 분말을 950$^{\circ}C$/1h 열처리하여, 단일 페로브스카이트 상을 얻었다. 이 분말에 3.0 몰%의 $Ag_2O$을 혼합한 후, 550$^{\circ}C$/1h 열처리로 Ag 입자를 생성시키고, 이 혼합 분말에 1.0wt%의 MgO 졸을 첨가한 다음 550$^{\circ}C$/1h 열처리하여 표면 개질된 분말을 얻었다. 이 분말을 산소 분위기에서 1000$^{\circ}C$/4h 열처리한 소결체는 소결 밀도 7.84/$cm^3$, 실온 유전율 18400, 유전손실 2.4%, 비저항 $0.24{\times}10^{12}{\Omega}{\cdot}cm$의 수한 유전 특성과 굽힘강도 $120.7{\pm}11.26$ MPa와 파괴인성 $0.87{\pm}0.002\;MPam^{1/2}$을 보여 주었다. 결정립의 크기는 ∼4${\mu}m$이며, SEM과 SIMS 분석은 Ag는 ∼1${\mu}m$ 크기로, 과잉의 MgO는 ∼0.5${\mu}m$로 분포되어 있음을 알 수 있었다.

A PMN-PT-BT/Ag composite was prepared by surface modification with MgO sol with hoping to suppress silver's migration during sintering. The mixture of PbO, $N_2O_5,\;TiO_2\;with\;Mg(NO_3)_2$ instead of MgO was ball milled, the solvent was removed and then the dried powders were calcined at 950$^{\circ}C$/1h. The calcined powder were treated with 3.0 mol% $Ag_2O$ and 1.0 wt% MgO sol and calcined at 550$^{\circ}C$/1h. The dielectrics sintered at 1000$^{\circ}C$/4h under a flowing oxygen showed the density of 7.84g/$cm^3$, the room temperature dielectric constant of 18400, the dielectric loss of 2.4%, the specific resistivity of $0.24{\times}10^{12}{\Omega}{\cdot}cm$. It also showed the bending strength of $120.7{\pm}11.26$ MPa and the fracture toughness of $0.87{\pm}0.002\;MPam^{1/2}$ which were comparable to commercial PZT. The microstructure sonsisted of grains of ∼4${\mu}m$. SEM and SIMS analysis showed that Ag grew as ∼1${\mu}m$ and excess MgO as ∼0.5${\mu}m$.

키워드

참고문헌

  1. L. E. Cross, 'Relaxor Ferroelectrics,' Ferroelectrics, 76 241-67 (1987) https://doi.org/10.1080/00150198708016945
  2. S. Nomura and K. Uchino, 'Electrostrictive Effect in Pb(${Mg}_{1/3}{Nb}_{2/3}$)$O_3$-type Materials,' Ferroelectrics, 41 117-32 (1982) https://doi.org/10.1080/00150198208210614
  3. K. Uchino, 'Electrostrictive Actuators: Materials and Applications,' Am. Ceram. Soc. Bull., 65 [4] 647-56 (1986).
  4. S. L. Swartz and T. R. Shrout, 'Fabrication of Perovskite Lead Magnesium Niobate,' Mater. Res. Bull., 17 1245-50 (1982) https://doi.org/10.1016/0025-5408(82)90159-3
  5. Q. Zhang, W. Pan, A. Bhalla and L. E. Cross, 'Electrostrictive and Dielectric Response in Lead Magnesium Niobate-lead Titanate (0.9PMNO.1PT) and Lead Lanthanum Zirconate Titanate (PLZT 9.5/65/35) under Variation of Temperature and Electric Field,' J. Am. Ceram. Soc., 72 [4] 599-604 (1989) https://doi.org/10.1111/j.1151-2916.1989.tb06181.x
  6. V. A. Isupov and E. P. Smimova, 'Electrostriction in Various Ferroelectric Ceramics with Diffuse Phase Transition,' Ferroelectrics, 90 141-45 (1989) https://doi.org/10.1080/00150198908211282
  7. S. Chen, S. Cheng and C. Wang, 'Effect of Barium Titanate on Microstructural Evolution and Properties of Lead Zinc Magnesium Niobate Ceramics,' J. Am. Ceram. Soc., 74 [2] 400-05 (1991) https://doi.org/10.1111/j.1151-2916.1991.tb06894.x
  8. H. Wang and W. A. Schulze, 'The Role of Excess Magnesium Oxide or Lead Oxide in Determining the Microstructure and Properties of Lead Magnesium Niobate,' J. Am. Ceram. Soc., 73 [4] 825-32 (1990) https://doi.org/10.1111/j.1151-2916.1990.tb05121.x
  9. M. F. Yan, H. C. Ling and W. W. Rhodes, 'Preparation and Properties of PbO-MgO-${Nb}_2O_5$, Ceramics Near the Pb(${Mg}_{1/3}{Nb}_{2/3}$ )$O_3$ Composition,' J. Mater. Res., 4 930-44 (1989) https://doi.org/10.1557/JMR.1989.0945
  10. M. F. Yan, H. C. Ling and W. W. Rhodes, 'Effects of Dopants on PbO-MgO-${Nb}_2O_5$, Ceramics Near the Pb(${Mg}_{1/3}{Nb}_{2/3}$) $O_3$ Composition,' J. Mater. Res., 4 945-66 (1989) https://doi.org/10.1557/JMR.1989.0945
  11. H. J. Hwang, T. Nagai, T. Ohji, M. Sando, M. Toriyama and K. Niihara, 'Curie Temperature Anomaly in Lead Zirconate Titanate/Silver Composites,' J. Am. Ceram. Soc., 81 [3] 709-12 (1998) https://doi.org/10.1111/j.1151-2916.1998.tb02394.x
  12. Y S. Cho, S. M. Pilgrim and H. Giesche, 'Dielectric and Electromechanical Properties of Chemically modified PMN-PT-BT Ceramics,' J. Am. Ceram. Soc., 83 [10] 2473-80(2000) https://doi.org/10.1111/j.1151-2916.2000.tb01578.x
  13. U. Syamaprasad, A. R. Sheeja Nair, M. S. Sarma, P. Guruswamy, P. S. Mukherjee, L. Krishnamurthy, M. Achuthan and A. D. Damodaran, 'Multilayer Capacitor Ceramics in the PMN-PT-BT System : Effect of MgO and $4PbOB_2O_3$ Addition,' J. Mater. Sci.,: Materials in Electronics, 8 199-205 (1997) https://doi.org/10.1023/A:1018554431950
  14. Y. Sato, H. Kanai and Y. Yamashita, 'Effects of Silver and Palladium Doping on the Dielectric Properties of 0.9Pb $(Mg_{1/3}Nb_{2/3})O_3-O.1PbTiO_3$ Ceramic,' J. Am. Ceram. Soc., 79 [1] 261-65 (1996) https://doi.org/10.1111/j.1151-2916.1996.tb07907.x
  15. Y Chen, D. Viehland and K, Uchino, 'Substituent Effects in 0.65Pb$(Mg_{1/3}Nb_{2/3})O_3-O.35PbTiO_3$ Piezoelectric Ceramics,' J. Electro-ceramics, 6 [1] 13-9 (2001)
  16. K. R. Han, S. Kim and H. J. Koo, 'New Preparation Method of Low-temperature-sinterable Perovskite 0.9Pb$(Mg_{1/3}Nb_{2/3})O_3-O.35PbTiO_3$ Powder and its Dielectric Properties,' J. Am. Ceram. Soc., 81 [11] 2998-3000 (1998) https://doi.org/10.1111/j.1151-2916.1998.tb02725.x
  17. K. R. Han, S. Jeong and C. S. Kim, 'Preparation of PMN-PT-BT Powder by Modified Mixed Oxide Method and Effect of Ag on Dielectric Properties,' J. Kor. Ceram. Soc., 39 [2] 159-63 (2002) https://doi.org/10.4191/KCERS.2002.39.2.159
  18. M. R. Winter, S. M. Pilgrim and M. Lejeune, 'Study on the Effect of Lanthanum Doping on the Microstructure andDielectric Properties of 0.9Pb(${Mg}_{1/3}{Nb}_{2/3}$)$O_3$-0.1PbTi$O_3$.' J. Am. Ceram. Soc., 84 [2] 314-20 (2001) https://doi.org/10.1111/j.1151-2916.2001.tb00656.x
  19. G. H. Maher, 'Effect of Silver Doping on the Physical and Electrical Properties of PLZT Ceramics,' J. Am. Ceram. Soc., 66 [6] 408-13 (1983) https://doi.org/10.1111/j.1151-2916.1983.tb10071.x
  20. K. Niihara, H. J. Hwang, M. Yasuoka, M. Sando and M. Toriyama, 'Fabrication, Sinterability and Mechanical Properties of Lead Zirconate Titanate/Silver Composites,' J. Am. Ceram. Soc., 82 [9] 2417-22 (1999) https://doi.org/10.1111/j.1151-2916.1999.tb02099.x
  21. K. Niihara, H. J. Hwang, K. Tajima, M. Sando and M. Toriyama, 'Fatigue Behavier of PZT-Based Nanocomposites with Fine Platium Particles,' J. Am. Ceram. Soc., 81 [12] 3325-28 (1998) https://doi.org/10.1111/j.1151-2916.1998.tb02776.x
  22. K. Niihara, H. J. Hwang, K. Watari, M. Sando and M. Toriyama, 'Low-temperature Sintering and High-strength Pb(Zr,Ti)$O_3$-matrix Composites Incorporating Silver Panicle,' J. Am. Ceram. Soc., 80 [3] 791-93 (1997) https://doi.org/10.1111/j.1151-2916.1997.tb02901.x
  23. J. Li, K. Takagi, N. Terakubo and R. Watanabe, 'Electrical and Mechanical Properties of Piezoelectric Ceramic/Metal Composites in the Pb(Zr,Ti)$O_3$/Pt System,' Appl. Phys. Lett., 79 [15] 2441-43 (2001) https://doi.org/10.1063/1.1403662
  24. T. K. Kundu and D. Chakravorty, 'Nanocomposites of Lead-zirconate-titanate Glass Ceramics and Metallic Silver,' Appl. Phys. Lett., 67 [18] 2732-34 (1995) https://doi.org/10.1063/1.114308
  25. R. Zuo, L. Li, R. Chen and Z. Gui, 'Sintering Characteristics and Dielectric Properties of Silver-doped PMNPZT-PT Relaxer Ferroelectric Ceramics,' J. Mater. Sci., 35 5433-36 (2000) https://doi.org/10.1023/A:1004819517683
  26. M. V. Silnkina, G. I. Dontsov and V. M. Zhukovsky, 'Diffusional Penetration of Silver from Electrodes into PZT Ceramics,' J. Mater. Sci., 28 5189-92 (1993) https://doi.org/10.1007/BF00570062
  27. E. Goo, T. Yamamoto and K. Okazaki, 'Microstructure of Lead-mgnesium-niobate Ceramics,' J. Am. Ceram. Soc., C188-C190 (1986)