Effects of dopants on properties of PZN-PSN-PMN-PZT ceramics

Abstract

In order to obtain high Q_m ceramics, different additives including MnO₂, Fe₂O₃ and K₂CO₃ were added into the base PZT composition of xPb(Zn_0.2Sn_0.3Mn_0.5)_1/3 Nb_2/3O₃-(1−x)Pb(Zr_0.5T_0.5)O₃. The mechanical quality factor Q_m increased while the piezoelectric constant decreased to some degree as MnO₂ was added alone. Although apparent decreasing was observed in piezoelectric constant d₃₃ after MnO₂ and Fe₂O₃ were added simultaneously, the mechanical quality factor Q_m was kept at the same level as before. The values of d₃₃ and Q_m decreased dramatically as K₂CO₃ was added in combination with MnO₂ and Fe₂O₃. The structure of grain boundary was damaged and more defects were generated by low valence K adding in this multi-impurified PZT solid. Mn doped sample presented a wide range of sintering temperature. The properties parameters of Mn doped PZT are listed as follows: piezoelectric constant d₃₃=256pC/N, mechanical quality factor Q_m=2079, coupling coefficient K_p=0.53, Coercive field E_c=22.5kV/cm, Cure Temperature T_c=286°C. These parameters show that Mn-doped PZT ceramics are suitable for application in high Q_m and transmitting materials.

Keywords

high Q_m ceramics / Mn doped PZT / sintering temperature

References

[1] Tan Qi, Xu Z, Li Jie-Fanfg, Viehland Dwight. Influence of Lower-valent A-site Modifications on the Structure-property Relations of Lead Zirconate Titanate. J. Appl. Phys., 1996, 80(10): 5866-74.

[2] Tan Qi, Viehland Dwight. Influence of Thermal and Electrical Histories on Domain Structure and Polarization Switching in Potassium-modified Lead Zirconate Titanate Ceramics. J. Am. Ceram. Soc., 1998, 81(2): 328-36.

[3] Galassi C, Roncar E, Capiani C, Craciun F. Processing and Characterization of HighQ _m Ferroelectric Ceramics. Journal of the European Ceramics Society, 1999, 19: 1237-41.

[4] Wanqiu Cui, Jing Zhou, Shuman Liu. Study on Structure and Properties of PMMN Piezoelectric Ceramics. Journal of Wuhan University of Technology—Mater. Sci. Ed., 1995, 10(2): 22-26.

[5] Pferner R A, Thurn G, Aldinger F. Mechanical Properties of PZT Ceramics with Tailored Microstructure. Materials Chemistry and Physics, 1999, 61: 24-30.

[6] Boutarfaia Ahmed. Investigations of Co-existence Region in Lead Zirconate-titanate Solid Solution: X-ray Studies. CeramicsInternational, 1999, 26: 583-587.

[7] Glinchuk M D, Bykov I P, Kurliand V M, Boudys M, Kala T, Nejezchleb K. Valency States and Distribution of Manganes Ions in PZT Ceramics Simultaneously Doped with Mn and Nb. Physica Status Solidi (A) Applied Research, 1990, 122(1): 341-346.

[8] Rakhimov R R, Wilkerson A L, Loutts G B, Noginov M A, Noginova N, Lindsay W, Ries H R. Spin and Valences States of Manganese Ions in Manganese-doped Yttrium Orthoaluminate. Solid State Regular Papers and Short Notes and Review Papers, 2001, 40(12): 6907-6910.

[9] Barranco A Pelaiz, Pinar F Calderon, Martinez O Perez, Huanosta A. Tera Grain Size, Dielectric Properties and Impendence Spectroscopy in a Modified Ternary System of Pb (Zr, Ti)O₃. Journal of Materials Science Letters, 1997, 16(7): 534-546.

[10] Bourim El Mostafa, Tanaka Hidehiko, Gabbay Maurice, Fantozzi Gilbert. Internal Friction and Dielectric Measurements in Lead Zirconate Titanate Ferroelectric Ceramics. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 2000, 39(9): 5542-5547.

[11] Sasaki Yasuhiro, Takahashi Sadayuki, Hirose Seiji. Relationship between Mechanical Loss and Phases of Physical Constants in Lead-zirconate-titanate Ceramics. Japanese Journal of Applied Physics, Part 1: Regular Papers&Short Notes&ReviewPapers, 1997, 36(9): 6058-6061.