Results 71 to 80 of about 9,543 (299)

Synthesis and characterization of nickel oxide doped barium strontium titanate ceramics Síntese e caracterização de cerâmicas de titanato de estrôncio e bário dopado com óxido de níquel

open access: yesCerâmica, 2012
Barium strontium titanate (BST) ceramics (Ba0.6Sr0.4)TiO3 were synthesized by solid state sintering using barium carbonate, strontium carbonate and rutile as the precursor materials.
M. Banerjee, S. Mukherjee, S. Maitra
doaj   +1 more source

Pliocene Te Aute limestones, New Zealand: Expanding concepts for cool-water shelf carbonates

open access: yes, 2003
Acceptance of a spectrum of warm- through cold-water shallow-marine carbonate facies has become of fundamental importance for correctly interpreting the origin and significance of all ancient platform limestones.
Nelson, Campbell S.   +11 more
core   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

open access: yesAdvanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro   +13 more
wiley   +1 more source

Oxidation of Carbon Monoxide on Strontium Ferrate

open access: yesECS Proceedings Volumes, 1995
The subject of conversion of natural gas to electric energy in Solid Oxide Fuel Cells (SOFCs) and formation of C{sub 2}-products from methane in electrochemical reactors, has received considerable attention recently. In order to reduce the problem of coke formation in SOFCs, methane is co-fed with water, forming CO and H{sub 2}.
openaire   +1 more source

Impact of nitrogenous fertilizers on carbonate dissolution in small agricultural catchments: Implications for weathering CO2 uptake at regional and global scales [PDF]

open access: yes, 2008
The goal of this study was to highlight the occurrence of an additional proton-promoted weathering pathway of carbonate rocks in agricultural areas where N-fertilizers are extensively spread, and to estimate its consequences on riverine alkalinity and ...
Probst, Jean-Luc   +2 more
core   +1 more source

Flexible Ag2Se‐Based Thermoelectrics: Fundamentals, Processing, and Device Applications

open access: yesAdvanced Materials, EarlyView.
Ag2Se‐based thermoelectrics are reviewed from fundamental transport mechanisms to flexible device integration. Crystal structure, defect chemistry, and band features are correlated with performance optimization strategies and scalable fabrication routes.
Jie Qin   +5 more
wiley   +1 more source

Geochemical Mechanisms of Biomineralization from Analysis of Deep-Sea and Laboratory Cultured Corals [PDF]

open access: yes, 2010
The ocean is a major component of global heat transport and represents a large exchangeable reservoir of CO₂. The importance of these effects on climate can be quantified with records of ocean temperature, chemistry and dynamics spanning past climate ...
Gagnon, Alexander C.
core   +1 more source

The effect of strontium carbonate additive on the production of graphitic boron nitride using modified O'connor method

open access: yesCumhuriyet Science Journal, 2021
In this study, it was investigated that whether the graphitic boron nitride was successfully synthesized by adding strontium carbonate (within the different amount of 20-40%) using O'Connor method which is the one of the solid-state methods or not ...
Muhammed Öz
doaj  

Phase Engineering of Atomically Precise Nanoclusters (APNCs) of Gold and Beyond

open access: yesAdvanced Materials, EarlyView.
Engineering the structural phase of materials is of paramount importance for both fundamental research and practical applications. In this Review, we summarize the recent progress in controlling the phases of atomically precise nanoclusters (APNCs) of gold, silver and copper, as well as bimetallic systems. The phase‐enabled material properties of APNCs
Yitong Wang   +4 more
wiley   +1 more source

Solid Phase Interaction Between Strontium Carbonate and Urea Nitrate

open access: yes, 1979
Department of Chemistry, Regional Institute of Technology, Jamshedpur. Manuscript received 5 June 1978, revised 1 November 1978, accepted 22 December 1978 Solid Phase Interaction Between Strontium Carbonate and Urea ...
D. N. PATHAK
core   +1 more source

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