Topic
Lead zirconate titanate
About: Lead zirconate titanate is a research topic. Over the lifetime, 7141 publications have been published within this topic receiving 150878 citations.
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TL;DR: In this paper, the dielectric constant and loss tangent with temperature at four fixed frequencies (1, 10, and 100 KHz and 1 MHz) were measured as a function of frequency in the frequency range 20 Hz-1 MHz.
Abstract: The piezomagnetic (ferrite)–piezoelectric (ferroelectric) composites with compositions (x) Ni0.2Co0.8Fe2O4+(1−x) Ba0.8Pb0.2Zr0.8Ti0.2O3 [barium lead zirconate titanate (BPZT)] in which x varies as 0.0, 0.15, 0.30, 0.45, and 1.0 mol % were prepared by conventional ceramic double-sintering method. The presence of constituent phases in the composites was confirmed by x-ray diffraction studies and the average grain size was calculated by using scanning electron microscopy. The dielectric constant (e′) and loss tangent (tan δ) were measured as a function of frequency in the frequency range 20 Hz–1 MHz. Variation of the dielectric constant and loss tangent with temperature at four fixed frequencies (1, 10, and 100 KHz and 1 MHz) was studied. The ac conductivity was studied to understand the conduction mechanism in terms of small polarons. The hysteresis behavior was studied to understand the magnetic properties such as saturation magnetization (Ms) and magnetic moment (μB). The static magnetoelectric (ME) voltage coefficient was measured as function of applied dc magnetic field and variation in ME response has been explained in terms of the content of piezomagnetic phase and the intensity of applied magnetic field. The maximum ME conversion factor of 536 μV/cm Oe was observed for 15% Ni0.2Co0.8Fe2O4+85% BPZT composite.
90 citations
TL;DR: Ferroelectric lead-free thin films were successfully deposited by pulsed laser deposition on PZT substrates using a ceramic BCZT target prepared by conventional solid state reaction.
Abstract: Ferroelectric lead-free thin films of 05(Ba07Ca03TiO3) – 05[Ba(Zr02Ti08)O3] (BCZT) were successfully deposited by pulsed laser deposition on Pt/TiO2/SiO2/Si substrates using a ceramic BCZT target prepared by conventional solid state reaction The in (111) direction orientated 600 nm thick films shows a clamped piezoelectric response of approximately d33,f = 80 pm/V and a dielectric coefficient of about ɛr = 1010; these are close to values obtained for lead zirconate titanate (PZT) films
90 citations
TL;DR: In this article, the structure of the prepared powders is characterized using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy, which revealed that the lattice strain depends on the different ionic radii of the dopants.
89 citations
TL;DR: In this paper, a dip-coated lead titanate and lead zirconate titanate (PZT) films strongly depend on the film thickness and the substrate in addition to the heat-treatment temperature.
Abstract: The modifications of dip-coated lead titanate (PT) and lead zirconate titanate (PZT) films strongly depend on the film thickness and the substrate in addition to the heat-treatment temperature. At 500 to 600 ° C, metastable paraelectric pyrochlore grew on glass plates (amorphous plates) when the thickness of the coated films produced by one coating cycle was below 100 nm, while ferroelectric perovskite formed on crystalline substrates or when thick films were coated on amorphous plates. This tendency is discussed in terms of an inhomogeneous reaction and the epitaxial effect. The perovskite PT films coated on single-crystal SrTiO3 plate at 700 ° C were strongly oriented to thec-axis.
89 citations
TL;DR: In this article, the possibility of employing thick film composite materials for capacitor dielectrics has been investigated using a system in which high permittivity ceramic powders (lead zirconate titanate) have been incorporated in a polymer matrix (poly (vinylidene fluoride)).
89 citations