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Showing 1 to 20 of 39 for “"Solid-state reaction"”.
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Synthesis of fluorophlogopite using solid-state reaction techniques
A commercial solid-state batch process for the manufacturing of synthetic fluorophlogopite (KMg3A1Si3010F2) mica powder was evaluated and standardized. The minimum firing temperature and time for this process was determined to be 1000°C for 10 hours to both ensure the complete reaction of the raw …
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The synthesis of beta alumina powders
Beta alumina solid electrolyte material is conventionally synthesized by the high temperature solid state reaction of α-Al₂O₃ with soda and a stabilizer ion such as lithia or magnesia. This reaction requires a reconstructive transformation of the α-Al₂O₃ oxygen sublattice and results in a two-phase …
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A low temperature calorimetric study of several high-T(c) superconductors
… 7-x}$ were prepared by solid state reaction. The samples were carefully characterized for impurities by x-ray diffraction and Raman spectroscopy. The resistivity and magnetic susceptibility of each sample was measured to characterize its superconducting transition.
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The synthesis of aluminium hydroxide and oxyhydroxide
… formed through the high temperature solid state reaction of α-alumina with soda and lithia, which results in a mixture of β- and β"-alumina phases. To maximise the amount of β"-alumina formed, a second heat treatment step is required. Beta alumina may also be synthesised directly from …
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Barium Titanate-Based Magnetoelectric Nanocomposites
… BTO-ferrite nanocomposites were grown by solid state reaction. Furthermore, BTO-metal nanostructures were also synthesized by solid state reaction under hydrogen gas which gave us a great inspiration to fabricate metal-ceramic composites. To understand the relationship between metal and …
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Thermodynamic properties of intermetallics
… DFT is the possibility to investigate chemical reactions as demonstrated in case of the formation of hercynite (Fe2AlO4) in a solid-state reaction of corundum (α - Al2O3) and iron. Further, the Al2O3 surface energies of various planes were investigated. In addition, interfaces, which are of …
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Photoluminescence Properties of Rare Earth Niobium Containing Oxides and Flux Synthesis of Rare Earth Transition Metal Containing Oxides
… materials were successfully synthesized by a solid-state reaction. La1-xEuxKNaNbO5 (x = 0.1-1) and La1-xTbxKNaNbO5 (x = 0.1-0.4) exhibit room-temperature photoluminescence with orange-red and green emissions, respectively. In addition, the excitation and emission spectra are same as the pure …
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Structural Characterization and Thermoelectric Performance of ZrNiSn Half-Heusler Compound Synthesized by Mechanical Alloying
… synthesized by mechanical alloying (MA) and consolidation by either Spark Plasma Sintering (SPS) or hot pressing (HP). X-Ray diffraction patterns of as milled powders and consolidated samples were compared and analyzed for phase purity. Thermal conductivity, electrical conductivity and Seebeck …
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Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study
… at various temperatures from 450°C to 750°C by solid-state reactions with initial Na:Co ratio ranging from 0.60 to 1.05. Four monophasic domains of' O3, O3', P3' and P2 and four biphasic regions were revealed based on an XRD analysis. The sodium contents in these phases were determined according …
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Thermal expansion of chemically modified mullite
Solid-state reaction and sol-gel, processing techniques were used extensively to form chemically-modified mullite solid solutions in an effort to lower their thermal expansion coefficients. TiO₂, B₂O₃, CrPO₄, P2O₅, Ga₂O₃, Cr2O₃, and WO₃ and the half-breed SiO₂ compounds AlPas, BPO₄, GaPO₄, BAsO₄, …
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ZnGa₂O₄ and ZnGa₂O₄:Mn²⁺ for potential use in vacuum fluorescent displays
… x ranging from 0 to 0.03, were synthesized by solid-state reaction techniques using oxide precursors fired in air, followed by reduction firing in 98%N₂, 2%H₂. The phase-pure ZnGa₂O₄ spinel structure of all the compositions was characterized by X-ray diffraction.
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The sintering effection of time, temperature, and ZnO additions on (Ca₀.₆,Mg₀.₄)Zr₄(PO₄)₆ [CMZP] ceramics
… powder (CMZP) synthesized via a new solid-state reaction method was investigated for application as a thermal barrier in next generation internal combustion engines. Specifically, CMZP is being considered as a potential material for the manufacture of exhaust port liners to increase …
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Ripening Kinetics of Iron Sulfides in the Presence/Absence of a Carbonyl Group
… was synthesized in a glass, thermostatted reaction vessel from aqueous hydrogen sulfide and ferrous ammonium sulfate. Formaldehyde, which acts as an organic switch leading to greigite formation instead of pyrite, was added to the reaction vessel to explore changes in kinetics which produce …
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Thermal expansion and thermal conductivity of (Ca<sub>1-x</sub>,Mg<sub>x</sub>)Zr₄(PO₄)₆ where x = 0.0-0.4
Solid-state reaction and sol-gel processing methods were used to prepare samples of (Ca<sub>1 - X,</sub>Mg<sub>X</sub>)Zr₄(PO₄)₆(CZP-CMZP) where x = 0.0-0.4. CMZP is a member of the NaZr₂(PO₄)₃ (NZP) class of ceramics and is being investigated for heat engine applications. Linear thermal expansion …
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ΜΕΛΕΤΗ ΔΟΜΙΚΩΝ ΚΑΙ ΜΑΓΝΗΤΙΚΩΝ ΙΔΙΟΤΗΤΩΝ ΣΕ ΥΛΙΚΑ ΜΟΝΙΜΩΝ ΜΑΓΝΗΤΩΝ: ΟΙ ΥΠΟΚΑΤΕΣΤΗΜΕΝΟΙ ΜΕ ΖΝ ΕΞΑΓΩΝΙΚΟΙ ΦΕΡΙΤΕΣ ΜΝ2-W
… POLYCRYSTALLINE SAMPLES HAVE BEEN PREPARED BY SOLID STATE REACTION OF OXIDES AND CATIONATES. THE PURITY CONTROL AND CRYSTALLOGRAPHIC CHARACTERIZATION HAVE BEEN PERFORMED BY MEANS OF X-RAY DIFFRACTION. THE CURIE TEMPERATURE HAS BEEN OBTAINED FROM SUSCEPTIBILITY MEASUREMENTS OF HIGH TEMPERATURES. …
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Studies of tartaric acid modified nickel supported catalysts for enantioselective hydrogenation reactions
… to methyl 3‐hydroxybutyrate. Variables of reaction during modification such as pH and tartaric acid concentration, as well as Ni particle size above a minimum threshold of ca. 20 nm, proved not to have a major effect on enantioselectivity. However, the nature of the cations constituting the …
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Synthesis and electrochemical characterization of lithium vanadium phosphate
… conductivity. LVP was synthesized via a solid-state reaction and cast into composite cathodes. (90/5/5 ratio of LVP, Super P Carbon, and PVDF.) These composite cathodes were used in lithium anode, LiPF6 liquid electrolyte, Swage-type cells that were galvanostatically cycled from 3.OV to …
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Thermoelectric Properties of Zr0.5Hf0.5Ni1-xPdxSn0.99Sb0.01 and Effect of Nanoinclusions on Transport Properties of Half Heuslers
… The half Heusler samples were prepared by solid state reaction. Resistivity, Seebeck coefficient and thermal conductivity were measured for all samples over a temperature range from room temperature to 750K. Hall effect measurements at room temperature were also performed. Addition of NiO …
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BaTiO₃ based materials for piezoelectric and electro-optic applications
… prepared as bulk polycrystals using a standard solid-state reaction technique in order to test the piezoelectric and dielectric properties. Some compositions were then chosen for thin film deposition. The films were deposited using pulsed laser deposition on MgO and SOI substrates. Growth …
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