Results 41 to 50 of about 120,946 (348)
On the Balance of Intercalation and Conversion Reactions in Battery Cathodes
, 2018 We present a thermodynamic analysis of the driving forces for intercalation and conversion reactions in battery cathodes across a range of possible working ion, transition metal, and anion chemistries.
Canepa, Pieremanuele +3 more
core +1 more source
Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley +1 more source
Cerâmica, 2008 A seleção de revestimentos refratários para a siderurgia é dependente de fatores termodinâmicos e microestruturais. O emprego de óxidos termodinamicamente estáveis, como a alumina e a magnésia, é fundamental para o aumento de vida útil do produto, por ...
M. A. L. Braulio +5 more
doaj +1 more source
Synthesis of zinc ferrite nanopowders in an RF thermal plasma [PDF]
, 2001 Nanosized zinc ferrite spinel powders of various compositions were produced in an RF thermal plasma from oxide mixtures and from co-precipitated hydroxides. The products were characterised for bulk chemical (ICP-AES), and phase composition (XRD).
Gubicza, Jenő +2 more
core
Advanced Engineering Materials, EarlyView.This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm +6 more
wiley +1 more source
Structural properties of Mn-substituted hercynite
Nukleonika, 2017 In this work spinel series with the general formula Fe1-xMnxAl2O4 (where x = 0, 0.3, 0.5 and 0.7) were synthesized and characterized with respect to their structure and microstructure. X-ray diffractometry (XRD) was used to identify the phase composition
Jastrzębska Ilona +5 more
doaj +1 more source
Thermodynamic Properties of MgAl2O4 Spinel at High Temperatures and High Pressures
Crystals, 2023 Thermodynamic properties of MgAl2O4 spinel are significant in understanding the phase relations of the Earth’s crust and upper mantle, but available values from experimental measurements are limited at ambient pressure conditions to date.
Wuxueying Qiu +3 more
doaj +1 more source
Thermochemistry of iron manganese oxide spinels [PDF]
, 2004 Oxide melt solution calorimetry has been performed on iron manganese oxide spinels prepared at high temperature. The enthalpy of formation of (MnxFe1−x)3O4 at 298 K from the oxides, tetragonal Mn3O4 (hausmannite) and cubic Fe3O4 (magnetite), is negative ...
Coradin, Hervé +4 more
core +3 more sources
Advanced Engineering Materials, EarlyView.Carbon‐free inert anodes are essential for decarbonizing aluminum electrolysis. This study investigates a recyclate‐based MgO‐316L steel composite anode tested under galvanostatic Hall–Héroult conditions in cryolite at 1000°C. Microstructural analysis reveals selective MgO fluorination, spinel and oxide layer formation, electrolyte infiltration, and ...
Serhii Yaroshevskyi +7 more
wiley +1 more source
Materials Research, 2009 Ni1-xZn xFe2O4 (x = 0 to 1) nanoparticles of size less than 9 nm were prepared by a chemical coprecipitation method which could be used for ferrofluid preparation.
Kandasamy Velmurugan +2 more
doaj +1 more source