Results 211 to 220 of about 7,396 (254)

Surface texture of strontium carbonate

Journal of Chemical Technology and Biotechnology, 1980
AbstractTwo batches of strontium carbonate (SrCO3) prepared at temperatures ⩽333 K (A) and 373 K (B) were investigated using differential thermal analysis (DTA), thermogravimetric (TG), X‐ray diffraction (XRD) and N2 adsorption techniques. Heat treatment up to 1073 K causes no material decomposition of the carbonate and DTA and TG results indicate ...
Anwar Amin, Suzy A. Selim
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Microbiological precipitation of strontium carbonate

2011 International Conference on Remote Sensing, Environment and Transportation Engineering, 2011
In this paper, The strontium carbonate precipitate was induced with the role of the enzymes according to the bacillus pasteurii reproduction in different concentrations of Sr2+. The morphology and structure of strontium carbonate were characterized by X-ray Diffraction (XRD), Energy Dispersive Spectroscopy (EDS) and Scanning Electronic Microscope (SEM).
null Wenkun Zhu, null Xuegang Luo
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Effective thermal conductivity of porous strontium oxide and strontium carbonate samples

Journal of Applied Physics, 1999
The thermal diffusivity of some pressed powder strontium oxide (SrO) and strontium carbonate (SrCO3) samples has been measured from room temperature to 1400 °C in vacuum and in an argon atmosphere using the laser flash technique. The structures of the samples have been analyzed using a scanning electron microscope and a theoretical model has been ...
H. Szelagowski, I. Arvanitidis, S. Seetharaman   +2 more
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Surfactants-Controlled Morphosynthesis of Strontium Carbonate

Advanced Materials Research, 2011
The controlled synthesis of SrCO3 microstructures with different morphologies, such as flower-like, cauliflower-like and finger-like, were successfully achieved in the presence of mixed nonionic/anionic surfactants polyoxyethylene (20) sorbitan monolaurate (Tween20) and sodium dodecyl sulfate (SDS).
Chao You, Qiang Zhang, Yun Zhao, Qing Ze Jiao   +3 more
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Absorption of strontium cations by a carbon nanomatrix

Coke and Chemistry, 2015
The structure and adsorption properties a new micro- and nanostructured carbon matrix are studied. The sorptional capacity of the matrix is 65 mg/g for strontium (II) cations; the moisture absorption is 285.7 mg/g. The matrix effectively removes the strontium cations from aqueous solution. This suggests that it might prove useful in the purification of
G. R. Mongush, V. I. Kotelnikov, A. V. Barinov   +2 more
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Reaction of Strontium Carbonate with Anatase and Rutile

Journal of the American Ceramic Society, 1986
The kinetics of the solid‐state reaction of strontium carbonate with anatase and rutile in air and carbon dioxide were studied by use of a thermobalance. The product was single‐phase SrTiO 3 in all cases.
HIROAKI TAGAWA, KAORU IGARASHI
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Les halogeno-carbonates de strontium

Journal of Inorganic and Nuclear Chemistry, 1969
Abstract In the SrX2SrCO3 (X  Cl, Br, I) binary systems a Sr3Br4Co3 orthorhombic phase isotypical with the baryum Ba3X4CO3 phases and a new metastable Sr4Cl6CO3 phase were made in evidence. Crystallographic data and thermal stability are determined.
Bernard Frit, Mohamed Moakil Chbany
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Preparation of strontium carbonate from celestite

Mineral Processing and Extractive Metallurgy, 2000
AbstractA novel method for the preparation of strontium carbonate from celestite ore has been investigated. The ore is reduced by brown coal at a temperature of 1000°C for a period of 3 h. The reduced product is leached with water at a liquid : solid ratio of 3 : 1 at 90°C and the slurry is then leached with hydrochloric acid at a solid : liquid ratio ...
Wen Chen, Yun Zhu
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Acid Reactivity of Carbonated Apatites with Strontium and Fluoride Substitutions

Journal of Dental Research, 1983
Carbonated apatites containing approximately 3.0 or 6.5% CO 3 were precipitated in the presence of sodium, strontium, and/or fluoride at various concentrations. Almost all the available strontium and fluoride was incorporated into the crystals, whereas only a portion of the carbonate and ...
J D, Featherstone, C P, Shields, B, Khademazad, M D, Oldershaw   +3 more
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Effect of Strontium Ions on Crystallization of Amorphous Calcium Carbonate

Crystal Research and Technology, 2019
AbstractIn biomineralization, amorphous precursors enable formation of complicated crystal shapes and incorporation of organic and inorganic impurities. In some cases the concentrations of the inorganic impurity atoms greatly exceed the thermodynamical (equilibrium) solubility limits.
Schmidt, I., Zolotoyabko, E., Lee, K., Gjardy, A., Berner, A., Lakin, E., Fratzl, P., Wagermaier, W.   +7 more
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