نتایج جستجو برای: mno
تعداد نتایج: 1787 فیلتر نتایج به سال:
We report the spin structure of an exchange-biased ferromagnetic oxide heterostructure, La(0.67)Sr(0.33)MnO(3)/SrRuO(3), through magnetization and polarized neutron reflectometry measurements. We reveal that the magnetization reversal process of the La(0.67)Sr(0.33)MnO(3) biased layer critically depends on the frozen-in spin structure of the SrRuO(3) biasing layer during the cooling process. Fu...
Manganese dioxides, inorganic materials which have been used in industry for more than a century, now find great renewal of interest for storage and conversion of energy applications. In this review article, we report the properties of MnO₂ nanomaterials with different morphologies. Techniques used for the synthesis, structural, physical properties, and electrochemical performances of periodic ...
X-ray diffraction with synchrotron radiation has been used for the first time to study chemical interaction in the MnO–ZnO system at 4.8 GPa and temperatures up to 1600 K. Above 750 K, the chemical reaction between MnO and ZnO has been observed that resulted in the formation of rock salt (rs) Mn1-xZnxO solid solutions (0.3 ≤ x ≤ 0.7). The lattice parameters of these solid solutions have been in...
در این تحقیق، کاتالیست های موثر و پایدار برای تولید اتیلن و پروپیلن از گاز سنتز تهیه شدند. در تهیه این کاتالیست ها از نمک های نیترات فلزات مورد نظر استفاده شد و کربنات سدیم به عنوان عامل رسوب دهنده به کار رفت. چندین مجموعه کاتالیست های fe/al2o3, fe/mno, co/ceo2, cu/mno, co/mno, fe/ti/zno/k2o, cu/co با زمان های عمردهی به رسوب بین 0 تا 300 دقیقه با استفاده از روش همرسویی تهیه شدند. طیف ها و ع...
DFT studies show that the rebound mechanism for MnO(tpp)(Cl)-catalyzed C-H hydroxylation is favored for spin states with oxyl character.
Nanostructured MnO(2) exhibits a high turnover frequency for oxygen evolution under visible light and high stability in strong acidic conditions.
A La0.5Ba0.5MnO3-δ oxide was prepared using the sol-gel technique. Instead of a pure phase, discovered to be combination La0.7Ba0.3MnO3-δ and BaMnO3. The in-situ production La0.7Ba0.3MnO3-δ+BaMnO3 nanocomposites enhanced oxygen vaca...
Although obesity is often associated with insulin resistance and a cluster of metabolic disturbances, the existence of a subgroup of healthy but obese individuals has been postulated. It is unclear why some obese individuals fail to show traditional risk factors associated with the insulin resistance syndrome despite having a very high accumulation of body fat. To address this issue, we identif...
Recent demand on welding fluxes for high-strength low-alloy steel grades has necessitated the development of CaF2-free towards high heat input applications. To meet such requirements, a flux design strategy been postulated by varying MnO/(CaF2 + MnO) mass ratio in CaF2–SiO2–MnO system. The effect MnO substitution CaF2 viscosity and structure investigated, quantitative relationship between struc...
In this work, the effect of annealing temperature on the microstructure, morphology, and optical properties of Cu-doped nanostructured MnO2 thin films were studied. The thin films were prepared by sol-gel spin-coating technique on glass substrates and annealed in the air ambient at 300, 350, 400 and 450 °C temperatures. The structural, morphological and optical properties of t...
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