Results 81 to 90 of about 10,946 (217)

New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 391-406, June 2026.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 more
wiley   +1 more source

Effect of Annealing Temperature on Thermal Behaviour and Crystallinity of Zinc Oxide Supported Magnesium Aluminate (ZnO/MgAl2O4) Via Green Synthesis One Pot Fusion [PDF]

Archives of Metallurgy and Materials
Zinc oxide-supported magnesium aluminate (ZnO/MgAl2O4) was synthesized by the one-pot fusion method, consuming magnesium nitrate, aluminum nitrate, and citric acid as starting precursors.
N.S. Sukiman, M.F. Zavawi, N. Rahmat, M.M. Al-Bakri Abdullah   +3 more
doaj   +1 more source

Wafer‐Scale Single‐Crystal Boron Nitride: Synthesis and Integration in 2D Electronics

Advanced Materials Interfaces, Volume 13, Issue 9, 5 May 2026.
This Review highlights recent breakthroughs in wafer‐scale hBN synthesis and its integration into next‐generation 2D electronics. We analyze growth kinetics, epitaxial strategies, and stacking‐sequence control while correlating material quality with device performance.
Jaewon Wang, Soon‐Yong Kwon
wiley   +1 more source

Material removal and deformation mechanism in multiple nanoscratches of single crystal MgAl2O4

Materials & Design
Single crystal MgAl2O4 requires ultra-precision machining to achieve dimensional accuracy and surface quality due to its high hardness and brittleness. To investigate the effect of multi-abrasive scratch sequences on the material removal and deformation ...
Jun Zhao, Yeshen Lan, Marian Wiercigroch, Wuqian Li, Shiwei Chen, Oltmann Riemer, Bernhard Karpuschewski   +6 more
doaj   +1 more source

Structural and magnetic anisotropy in the epitaxial FeV2O4 (110) spinel thin films

AIP Advances, 2015
The epitaxial 200-nm-thick FeV2O4(110) films on (110)-oriented SrTiO3, LaAlO3 and MgAl2O4 substrates were fabricated for the first time by pulsed laser deposition, and the structural, magnetic, and magnetoresistance anisotropy were investigated ...
Xiaolan Shi, Yuhang Wang, Kehan Zhao, Na Liu, Gaofeng Sun, Liuwan Zhang   +5 more
doaj   +1 more source

Chemical Equilibrium Abundances in Brown Dwarf and Extrasolar Giant Planet Atmospheres

, 1998
We calculate detailed chemical abundance profiles for a variety of brown dwarf and extrasolar giant planet atmosphere models, focusing in particular on Gliese 229B, and derive the systematics of the changes in the dominant reservoirs of the major ...
Adam Burrows, C. M. Sharp, Chase M. W., Martin E. L., Tsuji T., Tsuji T., Zapatero-Osorio M. R.   +6 more
core   +1 more source

Sonochemical preparation of high surface area MgAl2O4 spinel

Ultrasonics Sonochemistry, 2009
High surface area MgAl(2)O(4) has been synthesised by a sonochemical method. Two kinds of precursors were used, alkoxides and nitrates/acetates and in both cases nanostructured MgAl(2)O(4) was obtained. The effect of the addition of a surfactant during the sonication, cetyl trimethyl ammonium bromide, was also investigated.
TROIA, ADRIANO, PAVESE, MATTEO, GEOBALDO, FRANCESCO   +2 more
openaire   +2 more sources

CO2 Hydrogenation to Light Olefins and Single Hydrocarbons: Active Sites and Synergy in Oxide–Zeolite Catalysts

Carbon Neutralization, Volume 5, Issue 3, May 2026.
This work systematically reviews oxide–zeolite catalysts, summarizing the types of oxide active sites, regulation strategies for zeolites in selective hydrocarbon synthesis, and highlighting the crucial role of oxide–zeolite interactions. ABSTRACT Catalytic CO2 hydrogenation to light olefins and single hydrocarbons represents a crucial pathway for ...
Xiaohong Guo, Pengwei Li, Lingqing Kong, Peixiang Shi, Yanchun Li, Congming Li   +5 more
wiley   +1 more source

Magnetization and Anisotropy of Cobalt Ferrite Thin Films

, 2017
The magnetization of thin films of cobalt ferrite frequently falls far below the bulk value of 455 kAm-1, which corresponds to an inverse cation distribution in the spinel structure with a significant orbital moment of about 0.6 muB that is associated ...
Coey, J. M. D., Eskandari, F., Kameli, P., Porter, S. B., Rode, K., Venkatesan, M.   +5 more
core   +1 more source

Tracing the development of dust around evolved stars: The case of 47 Tuc [PDF]

, 2006
We observed mid-infrared (7.5-22 mum) spectra of AGB stars in the globular cluster 47 Tuc with the Spitzer telescope and find significant dust features of various types. Comparison of the characteristics of the dust spectra with the location of the stars
Dorschner J., Eriksson T. S., Henning Th., Hron J., J. Bouwman, K. Hinkle, Onaka T., Ossenkopf V., P. R. Wood, Posch Th., Th. Lebzelter, Th. Posch, Wood P. R.   +12 more
core   +2 more sources