Browsing NTNU Open by Author "Einarsrud, Mari-Ann"
Now showing items 21-40 of 138
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Chemical tracer diffusion of Sr and Co in polycrystalline Ca-deficient CaMnO3-δ with CaMn2O4 precipitates
Desissa, Temesgen D.; Kanas, Nikola; Singh, Sathya Prakash; Wiik, Kjell; Einarsrud, Mari-Ann; Norby, Truls Eivind (Journal article; Peer reviewed, 2018)Diffusivity on the A- and B-site of polycrystalline perovskite CaMnO3-δ with Ca deficiency and spinel CaMn2O4 (marokite) as a secondary phase was studied using chemical tracers and secondary ion mass spectrometry (SIMS) ... -
Composition and morphology tuning during hydrothermal synthesis of SrxBa1−xNb2O6 tetragonal tungsten bronzes studied by in situ X-ray diffraction
Grendal, Ola Gjønnes; Blichfeld, Anders Bank; Vu, Tuong-Dan; van Beek, Wouter; Selbach, Sverre Magnus; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2019)Current interest in 1D ferroelectric materials calls for cheap, controllable, reproducible and environmentally friendly synthesis routes. Hydrothermal synthesis stands out as one of the most promising routes, but a thorough ... -
Compositional Engineering of a La1-xBaxCoO3-δ-(1-a) BaZr0.9Y0.1O2.95 (a = 0.6, 0.7, 0.8 and x = 0.5, 0.6, 0.7) Nanocomposite Cathodes for Protonic Ceramic Fuel Cells
Rioja-Monllor, Laura; Bernuy-Lopez, Carlos; Fontaine, Marie-Laure; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2019)Compositionally engineered a La1-xBaxCoO3-δ-(1-a) BaZr0.9Y0.1O2.95 (a = 0.6, 0.7, 0.8 and x = 0.5, 0.6, 0.7) (LBZ) nanocomposite cathodes were prepared by oxidation driven in situ exsolution of a single-phase material ... -
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 ... -
Controlled growth of SrxBa1-xNb2O6 hopper- and cube-shaped nanostructures by hydrothermal synthesis
Grendal, Ola Gjønnes; Nylund, Inger-Emma; Blichfeld, Anders Bank; Tominaka, Satoshi; Ohara, Koji; Selbach, Sverre Magnus; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2020)Controlling the shape and size of nanostructured materials has been a topic of interest in the field of material science for decades. In this work, the ferroelectric material SrxBa1-xNb2O6 (x = 0.32–0.82, SBN) was prepared ... -
Controlling Oriented Attachment and in Situ Functionalization of TiO2 Nanoparticles During Hydrothermal Synthesis with APTES
Dalod, Antoine Robert Marie; Grendal, Ola Gjønnes; Skjærvø, Susanne Linn; Inzani, Katherine; Selbach, Sverre Magnus; Henriksen, Lars; van Beek, Wouter; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2017)Understanding growth mechanisms and the role of surface functionalization is of key importance to control shape and morphology of nanoparticles and their properties. Here, we describe the growth mechanism and the effect ... -
Controlling Phase Purity and Texture of K0.5Na0.5NbO3 Thin Films by Aqueous Chemical Solution Deposition
Gaukås, Nikolai Helth; Dale, Silje Marie; Ræder, Trygve Magnus; Toresen, Andreas; Holmestad, Randi; Glaum, Julia; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2019)Aqueous chemical solution deposition (CSD) of lead-free ferroelectric K0.5Na0.5NbO3 (KNN) thin films has a great potential for cost-effective and environmentally friendly components in microelectronics. Phase purity of KNN ... -
Deposition of silica nanoparticles onto alumina measured by optical reflectometry and quartz crystal microbalance with dissipation techniques
Güleryüz, Hasan; Kaus, Ingeborg; Buron, CC; Filiatre, C; Hedin, N; Bergstrøm, Lennart; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2014)Understanding of the interactions between particles and the substrate is important for successful sol–gel deposition of thin films. We have studied the deposition of silica nanoparticles on alumina coated surfaces in aqueous ... -
Development and ceramic processing of all-oxide thermoelectric module with direct p-n junction
Kanas, Nikola (Doctoral theses at NTNU;2018:91, Doctoral thesis, 2018) -
Development of hexagonal manganites for use in oxygen permeable membranes
Nesdal, Silje Kathrin (Master thesis, 2013)Mixed ionic-electronic conducting membranes can provide a cheaper and more environmental friendly alternative to cryogenic distillation for production of 100 % pure oxygen. However, most of today's state-of-the-art materials ... -
Development of oxides with n-type electronic conductivity for applications in high temperature thermoelectric generators (TEGs)
Singh, Sathya Prakash (Doctoral theses at NTNU;2018:378, Doctoral thesis, 2018) -
Development of Piezoelectric BCZT Ceramics as Electroactive Bone Implant Material
Poon, Kara Kamen (Doctoral theses at NTNU;2020:148, Doctoral thesis, 2020)The functionalisation of current load-bearing bone implant metals with piezoelectric ceramics is envisioned as a novel opportunity for promoting tissue healing and improving the strength of the bone-implant interface through ... -
Development of polymer-nanoparticle composite with high refractive index
Grendal, Ola Gjønnes (Master thesis, 2016)A newly developed lens technology utilizes a soft high refractive index polymer to change focus. By further increasing the refractive index of the polymer, without lowering the transmittance of visible light, the overall ... -
Effect of A-Site Cation Ordering on Chemical Stability, Oxygen Stoichiometry and Electrical Conductivity in Layered LaBaCo2O5+d Double Perovskite
Grande, Tor; Bernuy-Lopez, Carlos; Einarsrud, Mari-Ann; Høydalsvik, Kristin (Journal article; Peer reviewed, 2016)Abstract:The effect of the A-site cation ordering on the chemical stability, oxygen stoichiometryand electrical conductivity in layered LaBaCo2O5`δdouble perovskite was studied as a function oftemperature and partial ... -
Effect of A-Site Cation Ordering onChemical Stability, Oxygen Stoichiometry andElectrical Conductivity in Layered LaBaCo2O5+dDouble Perovskite
Bernuy-Lopez, Carlos; Høydalsvik, Kristin; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2016)The effect of the A-site cation ordering on the chemical stability, oxygen stoichiometry and electrical conductivity in layered LaBaCo2O5+δ double perovskite was studied as a function of temperature and partial pressure ... -
Effect of B-site substitution on the stability of La0.2Sr0.8Fe0.8B0.2O3-delta, B = Al, Ga, Cr, Ti, Ta, Nb
Lohne, Ørjan Fossmark; Gurauskis, Jonas; Phung, Tan Nhut; Einarsrud, Mari-Ann; Grande, Tor; Bouwmeester, Henny J. M.; Wiik, Kjell (Journal article; Peer reviewed, 2012)Single phase, cubic perovskites of composition La0.2Sr0.8Fe0.8B0.2O3 − δ, B = Al, Ga, Cr, Ti, Ta and Nb, were prepared by spray pyrolysis from aqueous precursor solutions. The effect of B-site substitution on the stability ... -
Effect of Cation Ordering on the Performance and Chemical Stability of Layered Double Perovskite Cathodes
Bernuy-Lopez, Carlos; Rioja-Monllor, Laura; Nakamura, Takashi; Ricote, Sandrine; O’Hayre, Ryan; Amezawa, Koji; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2018)The effect of A-site cation ordering on the cathode performance and chemical stability of A-site cation ordered LaBaCo2O5+δ and disordered La0.5Ba0.5CoO3−δ materials are reported. Symmetric half-cells with a proton-conducting ... -
Effect of CO2 Exposure on the Chemical Stability and Mechanical Properties of BaZrO3‐Ceramics
Sazinas, Rokas; Bernuy-Lopez, Carlos; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Preprint, 2016) -
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 ... -
Electric field dependent polarization switching of tetramethylammonium bromotrichloroferrite(III) ferroelectric plastic crystals
Walker, Julian; Sherrer, Simon; Løndal, Nora Statle; Grande, Tor; Einarsrud, Mari-Ann (Peer reviewed; Journal article, 2020)Tetramethylammonium bromotrichloroferrate(III) ([N(CH3)4][FeBrCl3]) is a plastic crystal ferroelectric with small dielectric constant <20 and piezoelectric coefficient as high as 110 pC/N. Here, super-coercive hysteresis ...