Study of modified PZT ceramics with low dielectric loss
Keywords:
modified PZT, piezoelectric ceramics, the electrical propertiesAbstract
The influence of complex additives MnO2-Bi2O3-MgO, MnO2-Bi2O3-MgO-La2O3, MnO2-Bi2O3MgO-Li2O, MnO2- Bi2O3-MgO-WO3, MnO2-Bi2O3-MgO-Nb2O5 and others on the electrical properties of PZT piezoelectric ceramics obtained by ceramic technology using mechanochemical activation was investigated. Analysis of the crystal structure and microstructure showed that ceramic with MnO2-Bi2O3-MgO-WO3 has a crystallite size of 2–6 µm and ceramic with MnO2-Bi2O3-MgONb2O5 has crystallite size of 1–3µm. Main and auxiliary elements are uniformly distributed over the surface of the ceramic, and no difference in their distribution to the boundaries and within the grains. The temperature dependence of εr and tg δ in the temperature range 20–320 °C for ceramics with different types of additives was studied. TC was defined as 290–260°C. Ceramic with MnO2-Bi2O3-MgO-Nb2O5 in the temperature range 20– 160 °C has tgδ not greater than 0.008, tgδs is not more than 0.01 with increasing electric field strength of 300 V/mm, and tg δs is not more than 0,017 for ceramic with MnO2-Bi2O3-MgO-WO3. Areas of possible application of the obtained ceramics are piezotransformers, ultrasonic transducers that capable of operating at high electric field and elevated temperature.
References
Головин В. А. Пьезоэлектрическая керамика (применение и производство) / В. А. Головин, В. И. Ривкин // Зару- бежная радиоэлектроника. – 1985. – № 3. – С. 47–59.
Пьезокерамика различного назначения / В. В. Климов, О. С. Дидковская, Г. Е. Савенкова, Ю. Н. Веневцев // Неорганические материалы. – 1995. – Т. 31, № 3. – С. 419–422.
Innovative Research and Products (iRAP) Inc. Piezoelectric Ceramic, Polymer and Ceramic/polymer composite Devices – Types, Materials, Applications, New Developments, Industry structure and Global Markets. – 2008. – Report ET. – 107 p.
Innovative Research and Products (iRAP) Inc. Piezoelectric Actuators and Motors–Types, Applications, New Developments, Industry Structure and Global Markets. – 2010. – Report ET. – 112 p.
Резниченко Л. А. Роль марганца в «ужесточении» сегнетоэлектрических материалов. / Л. А. Резниченко, О. Н. Разумовская, С. В. Гавриленко // Труды Междунар. конф. «Фундаментальные проблемы пьезоэлектрического приборостроения». – Ростов-на-Дону, 1999. – Т. 1. – C. 98–109.
Получение жесткой пьезокерамики на основе цирконата-титаната свинца / В. В. Климов, Н. И. Селикова, В. В. Дорофеева, А. Н. Бронников // Неорганические материалы. – 2004. – Т. 40, № 12. – С. 1526–1529.
Климов В. В. Влияние оксидов марганца, висмута и цинка на электрофизические свойства пьезокерамики на основе ЦТС / В. В. Климов, Н. И. Селикова, А. Н. Бронников // Неорганические материалы. – 2006. – Т. 42, № 5. – С. 634–638.
Van V. Role of Secondary Phase in High Power Piezoelectric PMN-PZT Ceramics / V. Van, K.-H. Cho, S. Priya // J. Amer. Ceram. Soc. – 2011. – Vol. 94, No 12. – P. 4138–4141.
Van V. Piezoelectric properties and temperature stability of Mn-doped Pb(Mg1/3Nb2/3)O3-PbZrO3-PbTiO3 ceramics / V. Van, K.-H. Cho, S. Priya // J. Appl. Phys. Letter. – 2011. – P. 100908.
Guiffard B. Fluorine-oxygen substitution in MgO-doped lead zirconate titanate ceramics: diffractometric and dielectric studies / B. Guiffard, M. Troccaz // J. Mater. Sci. – 2000. – Vol. 35. – P. 101–104.
Influence of the fluoride ion on the piezoelectric properties of a PZT / L. Eyraud, P. Eyraud, D. Audigier, B. Claudel // Ferroelectrics. – 1995. – Vol. 175. – P. 241–250.
France Patent 9502744. Ceramigues Flurees de puisiance. Eyraud L., Eyraud P., Audiger D., Boisrayon M. – 1995. – 15 p.
Guiffard B. Fluorine-oxygen substitution in MgO-doped lead zirconate titanate ceramics: diffractometric and dielectric studies / B. Guiffard, M. Troccaz // J. Mater. Sci. – 2000. – Vol. 35. – P. 101–104.
ГОСТ 11-0444-87 Материалы пьезокерамические: технические условия.
ГОСТ 473.4-81 Изделия химические стойкие и термостойкие керамические. Метод определения кажущейся плотности и кажущейся пористости.
ГОСТ 473.3-81 Изделия химические стойкие и термостойкие керамические. Метод определения водопоглощения.
