Sfoglia per Soggetto "Thermal expansion"
Items 1-13 di 13
-
Acceptor doping effects on microstructure, thermal and electrical properties of proton-conducting BaCe0.5Zr0.3Ln0.2O3-δ (Ln = Yb, Gd, Sm, Nd, la or Y) ceramics for solid oxide fuel cell applications
(2016)In the present work, six materials belonging to Ln-doped BaCeO3-BaZrO3 system (Ln = Yb, Y, Gd, Sm, Nd, La) are prepared and characterized. The impact of the type of the acceptor dopant on i) the microstructure (relative ... -
Characterization of proton-conducting electrolyte based on La0.9Sr0.1YO3-δ and its application in a hydrogen amperometric sensor
(2016)In the present study, a Sr-doped LaYO3 proton-conducting material is successfully synthesized by the citrate-nitrate combustion method and its phase features, microstructure, thermal behavior and transport properties are ... -
Designing a protonic ceramic fuel cell with novel electrochemically active oxygen electrodes based on doped Nd0.5Ba0.5FeO3-: δ
(2018)The Fe-based perovskite-structured Nd0.5Ba0.5FeO3-δ (NBF) system represents the basis for developing promising electrode materials for solid oxide fuel cells with proton-conducting electrolytes. This study aims at investigating ... -
A detailed analysis of thermal and chemical compatibility of cathode materials for BaCeO3 and BaZrO3-based electrolytes for solid oxide fuel cell application
(2015)The identification of suitable cathode materials, which can be successfully used in unit SOFCs based on proton-conducting electrolytes during long-term stability and thermal cycling measurements is investigated in the ... -
A detailed analysis of thermal and chemical compatibility of cathode materials suitable for BaCe0.8Y0.2O3−Δ and BaZr0.8Y0.2O3−Δ proton electrolytes for solid oxide fuel cell application
(2017)The aim of this work is to identify suitable cathode materials for SOFCs based on proton-conducting electrolytes (SOFC-H+) in terms of long-term and thermal cycling stability along with a low polarization resistance. To ... -
Effect of isovalent substitution of La3+ in Ca-doped LaNbO4 on the thermal and electrical properties
(2019)The effect of the equimolar substitution of lanthanum in Ca-doped LaNbO4 on the functionality of (La0.5Ln0.5)0.99Сa0.01NbO4–δ (where Ln = La, Nd and Sm) is investigated in the present work. Highly dense, single-phase and ... -
The effect of y by Yb substitution in BaCe0.5Zr0.3Y0.2O3-Δ on the target properties of proton-conducting electrolytes
(2015)The BaCe0.5Zr0.3Y0.2-xYbxO3-δ ceramic materials are prepared and characterized in the present work. The impact of the partial Y3+/Yb3+ substitution on i) crystal structure, ii) microstructure (relative density, grain size), ... -
The influence of heat transfer effects on turbine performance characteristics
(2006)A method allowing the evaluation of the effects related to heat transfer to the turbine blades on its performance characteristics is presented. The effects investigated are the change of passage dimensions, resulting from ... -
Insights on thermal and transport features of BaCe0.8-xZrxY0.2O3-delta proton-conducting materials
(2015)BaCe0.8-xZrxY0.2O3-delta-based materials (BCZYx, 0 <= x <= 0.8) are obtained through a modified citrate-nitrate combustion method at 1150 degrees C with following sintering at 1450 degrees C. Then their thermomechanical ... -
Physico-chemical characterization and transport features of proton-conducting Sr-doped LaYO3 electrolyte ceramics
(2016)Structure, thermal and transport properties of chemically stable proton-conducting La0.9Sr0.1YO3-δ electrolyte are investigated in the present work. The features of ceramics preparation, thermal expansion and electrical ... -
Proton-conducting BaCe0.5Zr0.3Ln0.2O3-δ (Ln = Yb, Gd, Sm, Nd, la or Y) ceramics for solid oxide fuel cell applications: Effects of acceptor-doping on microstructure, thermal and electrical properties
(2015)Six materials belonging to Ln-doped BaCeO3-BaZrO3 system (Ln = Yb, Y, Gd, Sm, Nd, La) are prepared and characterized in the present work. The impact of the type of the acceptor dopant on (i) the microstructure (relative ... -
STRUCTURAL RESPONSE OF SUBSEA PIPE ELBOWS UNDER MONOTONIC AND CYCLIC LOADING
(2022)Pipe bends (elbows) are commonly used components in subsea piping systems. They are quite flexible compared to the corresponding straight pipes and are used to reduce the reaction forces and moments at the supports and the ... -
Structural, thermomechanical and electrical properties of new (1-x) Ce0.8Nd0.2O2-delta-xBaCe(0.8)Nd(0.2)O(3-delta) composites
(2014)In this work composite (1-x)Ce0.8Nd0.2O2-delta-xBaCe(0.8)Nd(0.2)O(3-delta) ceramics were prepared via the one-step citrate-nitrate combustion procedure, and characterised by TG-DSC, XRD analysis, and SEM. Their transport ...