Browsing NTNU Open by Author "Morozov, Maxim"
Now showing items 1-12 of 12
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Atmosphere controlled conductivity and Maxwell-Wagner relaxation in Bi0.5K0.5TiO3 – BiFeO3 ceramics
Morozov, Maxim; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2014)Here, we report on a giant dielectric relaxation in (1 x)Bi0.5K0.5TiO3—xBiFeO3 ceramics below 300 C, which becomes more pronounced with increasing BiFeO3 content. The relaxation was shown to be of Maxwell-Wagner type ... -
Control of conductivity and electric field induced strain in bulk Bi0.5K0.5TiO3-BiFeO3 ceramics
Morozov, Maxim; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2014)High electrical conductivity is one of the main obstacles for advances of bulk BiFeO3 ceramics in piezoelectric applications. Here, we demonstrate that the electrical conductivity of BiFeO3 can be lowered by compositional ... -
Effect of crystallographic orientation in textured Baa0.92Ca0.08TiO3 piezoelectric materials
Haugen, Astri Bjørnetun; Morozov, Maxim; Johnsson, Mats; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2014)Strongly textured lead-free Ba0.92Ca0.08TiO3 piezoelectric ceramics were fabricated by tape casting and templated grain growth. Dense ceramics with both favorable and unfavorable texture were successfully prepared. Enhanced ... -
Epitaxial K0.5Na0.5NbO3 thin films by aqueous chemical solution deposition
Pham, Ky-Nam; Gaukås, Nikolai Helth; Morozov, Maxim; Tybell, Per Thomas Martin; Vullum, Per Erik; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2019)We report on an environmentally friendly and versatile aqueous chemical solution deposition route to epitaxial K0.5Na0.5NbO3 (KNN) thin films. The route is based on the spin coating of an aqueous solution of soluble ... -
In-situ structural investigations of ferroelasticity in soft and hard rhombohedral and tetragonal PZT
Morozov, Maxim; Einarsrud, Mari-Ann; Tolchard, Julian R.; Kyle, Webber; Dragan, Damjanovic; Grande, Tor; Philipp, Geiger (Journal article; Peer reviewed, 2015-10-28)Despite the technological importance of hard and soft PZT, Pb(Zr,Ti)O3, ceramics, the mechanisms of ferroelectric hardening and softening remain widely discussed in the literature. The hardening and softening phenomena ... -
Lead-Free Relaxor-Like 0.75Bi(0.5)K(0.5)TiO(3)-0.25BiFeO(3) Ceramics with Large Electric Field-Induced Strain
Morozov, Maxim; Einarsrud, Mari-Ann; Grande, Tor; Damjanovic, D. (Journal article; Peer reviewed, 2012)Dense and phase-pure ferroelectric ceramics of 75 mol.% Bi0.5K0.5TiO3 – 25 mol.% BiFeO3 are prepared by the conventional solid state reaction method. Their crystal structure is analyzed and discussed. The dielectric and ... -
Mechanical stability of piezoelectric properties in ferroelectric perovskites
Schader, Florian H; Morozov, Maxim; Tjønneland Wefring, Espen; Grande, Tor; Webber, Kyle G (Journal article; Peer reviewed, 2015)The influence of uniaxial compressive stress on the small signal direct piezoelectric coefficient of hard and soft Pb(Zr,Ti)O3 at the morphotropic phase boundary was investigated as a function of temperature from 25 °C to ... -
On the Effect of A to B Stoichiometry Variation on Conductivity and Phase Purity in 0.8BiFeO3-0.2Bi0.5K0.5TiO3: Development of Lead-Free Ferroelectric Materials
Christensen, Mads Jonas (Master thesis, 2014)Piezoelectric materials are currently widely used in both electronics and transducer applications. Today, the majority of these units are based on the lead containing material system PZT, and release of lead to the environment ... -
Piezoelectric K0.5Na0.5NbO3 Ceramics Textured Using Needlelike K0.5Na0.5NbO3 Templates
Haugen, Astri Bjørnetun; Olsen, Gerhard Henning; Madaro, Francesco; Morozov, Maxim; Tutuncu, Goknur; Jones, Jacob L.; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2014)Improved performance by texturing has become attractive in the field of lead-free ferroelectrics, but the effect depends heavily on the degree of texture, type of preferred orientation, and whether the material is a rotator ... -
Polarization and strain response in Bi0.5K0.5TiO3-BiFeO3 ceramics
Morozov, Maxim; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2012)Highly dense and phase-pure ferroelectric ceramics in the (1-x)Bi0.5K0.5TiO3–xBiFeO3 system have been prepared and examined in a wide range of composition (0.1 ≤ x ≤ 0.9). The dielectric and electromechanical properties ... -
Rayleigh analysis of dielectric properties in textured K0.5Na0.5NbO3 ceramics
Haugen, Astri Bjørnetun; Morozov, Maxim; Jones, Jacob L.; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2014)Grain texturing is a known method of exploiting the intrinsic dielectric and piezoelectric anisotropy in ferroelectric ceramics. However, the role of crystallographic texture on anisotropic extrinsic contributions including ... -
Solid-State Synthesis and Properties of Relaxor (1 – x)BKT–xBNZ Ceramics
Tjønneland Wefring, Espen; Morozov, Maxim; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2014-07-08)Conventional solid-state synthesis was used to synthesize dense and phase pure ceramics in the (1−x) Bi0.5K0.5TiO3–xBi0.5Na0.5ZrO3 (BKT–BNZ) system. Structural characterization was done using X-ray diffraction at both room ...