Influence of electric field DC-component on AC-response of ferroelectric powder

• Autorzy: Starzyk F. , Bąk W. , Kajtoch C. , Gabryś M.
• Języki publikacji: PL

Abstrakty

EN

Purpose: of this work was to establish whether ac-response of freely stocked micro-granular ferroelectric matter on fringe measuring electric field depends on constant component presence VDC (or DC-Bias). Design/methodology/approach: used involves measurements of effective dielectric permittivity (and other effective dielectric quantities) by means of interdigit dielectrometry. Fringe measuring electric field was applied to BaTiO3 micro-powder by interdigit comb sensor (ICS) Netzsch of Ms25 type. ICS was driven by measuring generator with sinusoidal voltage: v(t)= VDC+VACsin(�ωt), within frequency range 20Hz-100kHz and for DC-Bias values ranging as VDC=(0-20)V. Findings: The interdigit dielectrometry was applied to measure complex dielectric permittivity, complex dielectric modulus and others dielectric functions of ferroelectric BaTiO3 powder. The influence of constant component of electric stimulus was investigated in the frequency range 100 kHz to 20 Hz. It was established that in the low frequency range constant component of electric field enhances effective dielectric permittivity, and changes two weak relaxation processes occurring in the ferroelectric micro-granular net. It turned out that effective dielectric complex modulus of this net is most sensitive quantity for application of constant component of electric stimulus. Research limitations/implications: The density solution effect is a source of small effective dielectric permittivity of micro-granular ferroelectric powder (�ε'). �Epsilon' values are being enhanced by presence of non zero VDC value. The same effect was established for effective energy loss coefficient (�ε"). The two relaxational processes connected with VDC�𕟀 seems to be a key feature of freely stocked ferroelectric matter. Originality/value: of this work relays on the fact, that this is a first report of the VDC influence on effective dielectric properties of ferroelectric micro-granular matter. It is opening the way to a new approach in modelling of effective dielectric properties of granular matter in nature and powders technology.

Słowa kluczowe

PL

skuteczna dielektryczna przenikalność

EN

ferroelectric BaTiO3 powder; effective dielectric permittivity; interdigit dielectrometry

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 29, nr 1
• Strony: 36--39
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Starzyk F.

autor

Bąk W.

autor

Kajtoch C.

autor

Gabryś M.

• Institute of Physics, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland,

Bibliografia

• [1] R. Nowosielski, R. Babilas, J. Wrona, Microstructure and magnetic properties of commercial barium ferrite powders, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 307-310.
• [2] R. Nowosielski, R. Babilas, G. Dercz, L. Pająk, J. Wrona, Barium ferrite powders prepared by milling and annealing, Journal of Achievements in Materials and Manufacturing Engineering 22 (2007) 45-48.
• [3] A. Buchacz, Influence of piezoelectric on characteristics of vibrating mechatronical system, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 229-232.
• [4] N.F. Shepard, S.L. Garverick, D.R. Day, S.D. Senturia, Microdielectrometry: a new method for in situ cure monitoring, Proceedings of the 26th SAMPLE Symposium, Los Angeles, CA, 1981, 65-76.
• [5] S.D. Senturia, N.F. Shepard Jr, H.L. Lee, D.R. Day, In-situ measurement of the properties of curing systems with microdielectrometry, Journal of Adhesion 15 (1982) 69-90.
• [6] S.D. Senturia, N.F. Shepard Jr, Dielectric analysis of thermoset cure, Advance Polymer Science 80 (1986) 1-49.
• [7] A.V. Mamishev, A.R. Takahashi, Y. Du, B.C. Lasientre, M. Zahn, Parameter estimation in dielectrometry measurements, Journal of Electrostatics 56 (2002) 465-492.
• [8] A.V. Mamishev, K. Sundara-Rajan, F. Yang, Y. Du, M. Zahn, Interdigital sensors and transducers, Proceedings of the IEEE, 92/5, 2004, 808-845.
• [9] K. Sundara-Rajan, L. Byrd, A.V. Mamishev, Moisture content estimation in paper pulp using fringing field impedance spectroscopy, IEEE Sensors Journal 13 (2004) 378-383.
• [10] Wah On Ho, S. Krause, C.I. Mc Neil, I.A. Pritchard at all, Elecrochemical sensor for measurement of urea and creatinine in serum based on ac impedance measurement of enzyme-catalysed polymer transformation, Analytical Chemistry 71 (1999) 1940-1946.
• [11] C. Berggren, B. Bjarnason, G. Johansson, Capacitive biosensors, Electroanalysis 13 (2001) 173-180.
• [12] R. Hilfer, J. Widjajakusuma, B. Biswal, Macroscopic dielectric constant for microstructures of sedimentary rocks, Granular Matter 2, Springer-Verlag, 2000, 137-141.
• [13] R. Hilfer, Geometric and dielectric characterization of porous media, Pysical Review B (1991) 44-60.
• [14] E. Evdem, R. Boetthcher et al., Ferroelectrics 316 (2005) 43.
• [15] F. Starzyk, W. Bąk, Application of interdigit dielectrometry to BaTiO3 powder – influence of stimulus constant component on effective dielectric and electric properties, Proceedings of the XVII Czech-Polish Seminar: Structural and ferroelectric phase transitions, Znojmo, 2006, 89.