Results 31 to 40 of about 120,946 (348)

Electronic structure and optical band gap of CoFe2O4 thin films

open access: yes, 2012
Electronic structure and optical band gap of CoFe2O4 thin films grown on (001) oriented LaAlO3 have been investigated. Surprisingly, these films show additional Raman modes at room temperature as compared to a bulk spinel structure.
Padhan, P.   +2 more
core   +3 more sources

Exchange biasing of single-domain Ni nanoparticles spontaneously grown in an antiferromagnetic MnO matrix [PDF]

open access: yes, 2007
Exchange biased composites of ferromagnetic single-domain Ni nanoparticles embedded within large grains of MnO have been prepared by reduction of Ni$_x$Mn$_{1-x}$O$_4$ phases in flowing hydrogen.
Abramoff M D   +7 more
core   +1 more source

Optical constants of refractory oxides at high temperatures

open access: yes, 2013
Many cosmic dust species, among them refractory oxides, form at temperatures higher than 300 K. Nevertheless, most astrophysical studies are based on the room-temperature optical constants of solids, such as corundum and spinel. A more realistic approach
Mutschke, Harald   +2 more
core   +1 more source

Petrography and petrology of the Hawaii Scientific Drilling Project lavas: Inferences from olivine phenocryst abundances and compositions [PDF]

open access: yes, 1996
The Mauna Loa (ML) and Mauna Kea (MK) lavas recovered by the Hawaii Scientific Drilling Project (HSDP) include aphyric to highly olivine-phyric basalts.
Alves, Sophie   +2 more
core   +1 more source

Cu-Mg-Fe-O-(Ce) complex oxides as catalysts of selective catalytic oxidation of ammonia to dinitrogen (NH3-SCO) [PDF]

open access: yes, 2020
Multicomponent oxide systems 800-Cu-Mg-Fe-O and 800-Cu-Mg-Fe-O-Ce were tested as catalysts of selective catalytic oxidation of ammonia to dinitrogen (NH3-SCO) process.
Górecka, Sylwia   +5 more
core   +1 more source

Formação in-situ ou adição de espinélio pré-formado: o que é melhor para concretos refratários aluminosos? In-situ formation or pre-formed spinel addition: which one is better for high alumina refractory castable?

open access: yesCerâmica, 2010
O desenvolvimento do setor siderúrgico está intimamente relacionado aos progressos obtidos na produção de refratários. Nas panelas de siderurgia, uma das principais exigências são revestimentos que apresentem excelentes propriedades termomecânicas para ...
E. Y Sako   +4 more
doaj   +1 more source

Mononuclear Transition Metal Cymantrenecarboxylates as Precursors for Spinel-Type Manganites

open access: yesMolecules, 2022
Novel mononuclear cymantrenecarboxylate complexes of transition metals, [Co(H2O)6](CymCO2)2·4H2O (Cym = (η5-C5H4)Mn(CO)3) (1), [Ni(H2O)6](CymCO2)2·4H2O (2), [Zn(H2O)6](CymCO2)2·4H2O (3), [Co(CymCO2)2(imz)2] (imz = imidazole, 4), [Co(CymCO2)2(bpy)2]·2PhMe
Pavel S. Koroteev   +4 more
doaj   +1 more source

Airport veer-off risk assessment: An italian case study [PDF]

open access: yes, 2017
The objective of this paper is to assess the veer-off risk of an Italian airport that is characterized for having near 12,000 annual movements. The name of this airport is not disclosed for security purposes.
Cantisani, Giuseppe   +2 more
core  

The Origin and Significance of Reverse Zoning in Melilite from Allende Type B Inclusions [PDF]

open access: yes, 1984
In many Type B Allende inclusions, melilite is reversely-zoned over restricted portions of each crystal. Textural relationships and the results of dynamic crystallization experiments suggest that the reverselyzoned intervals in these Type melilites ...
Grossman, Lawrence   +3 more
core   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

open access: yesAdvanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé   +5 more
wiley   +1 more source

Home - About - Disclaimer - Privacy