Academic literature on the topic 'Silicophosphates'
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Journal articles on the topic "Silicophosphates"
Neeraj, M. Eswaramoorthy, and C. N. R. Rao. "Mesoporous silicophosphates." Materials Research Bulletin 33, no. 10 (October 1998): 1549–54. http://dx.doi.org/10.1016/s0025-5408(98)00147-0.
Full textSchöneborn, M., W. Hoffbauer, J. Schmedt auf der Günne, and R. Glaum. "Beiträge zur Kristallchemie und zum thermischen Verhalten von wasserfreien Phosphaten, XXXVII [1]. Synthese, Kristallstruktur und kernresonanzspektroskopische Untersuchung von In2Ti6(PO4)6[Si2O(PO4)6] – Eine Hybride aus den NASICON und M4[Si2O(PO4)6] Strukturtypen / Contributions on Crystal Chemistry and Thermal Behaviour of Anhydrous Phospates, XXXVII [1]. Synthesis, Crystal Structure and Nuclear Magnetic Resonance Investigation of In2Ti6(PO4)6- [Si2O(PO4)6] – A Hybride Built from Layers with NASICON and M4[Si2O(PO4)6] Structures." Zeitschrift für Naturforschung B 61, no. 6 (June 1, 2006): 741–48. http://dx.doi.org/10.1515/znb-2006-0614.
Full textOkada, Kenji, Masanari Takano, Yasuaki Tokudome, Yomei Tokuda, and Masahide Takahashi. "Preparation of Silicophosphate Alternating Hybrid Copolymers via Nonaqueous Acid-Base Reactions of Phosphoric Acid and Organo-Bridged Bis(chlorosilane)." Molecules 25, no. 1 (December 28, 2019): 127. http://dx.doi.org/10.3390/molecules25010127.
Full textHanawa, Masafumi, Tomoyuki Kobayashi, and Hideo Imoto. "Silicophosphates of Rhodium and Indium." Zeitschrift für anorganische und allgemeine Chemie 626, no. 1 (January 2000): 216–22. http://dx.doi.org/10.1002/(sici)1521-3749(200001)626:1<216::aid-zaac216>3.0.co;2-o.
Full textStyskalik, Ales, David Skoda, Zdenek Moravec, Craig E. Barnes, and Jiri Pinkas. "Surface reactivity of non-hydrolytic silicophosphate xerogels: a simple method to create Brønsted or Lewis acid sites on porous supports." New Journal of Chemistry 40, no. 4 (2016): 3705–15. http://dx.doi.org/10.1039/c5nj02928g.
Full textYong, Y., and P. Wenqing. "Hydrothermal synthesis of sodium zirconium silicophosphates." Journal of Materials Science Letters 9, no. 10 (October 1990): 1143–44. http://dx.doi.org/10.1007/bf00721869.
Full textHanawa, Masafumi, Tomoyuki Kobayashi, and Hideo Imoto. "ChemInform Abstract: Silicophosphates of Rhodium and Indium." ChemInform 31, no. 15 (June 9, 2010): no. http://dx.doi.org/10.1002/chin.200015005.
Full textBENMOUSSA, A., and C. MICHEL. "Propriétés magnétiques de phosphates et silicophosphates de titane." Annales de Chimie Science des Matériaux 24, no. 3 (March 1999): 233–40. http://dx.doi.org/10.1016/s0151-9107(99)80049-x.
Full textGUNAWARDANE, RP. "SOLID SOLUBILITY OF APATITES IN SILICOPHOSPHATES AND SILICOSULPHATES." Journal of the National Science Foundation of Sri Lanka 21, no. 2 (December 29, 1993): 243. http://dx.doi.org/10.4038/jnsfsr.v21i2.8108.
Full textJähnigen, Sandra, Erica Brendler, Uwe Böhme, Gerhard Heide, and Edwin Kroke. "Silicophosphates containing SiO6octahedra – anhydrous synthesis under ambient conditions." New J. Chem. 38, no. 2 (2014): 744–51. http://dx.doi.org/10.1039/c3nj00721a.
Full textDissertations / Theses on the topic "Silicophosphates"
Han, Xue Song. "Studies on the synthesis of silicoaluminophosphates and silicophosphates." Thesis, University of Wolverhampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252455.
Full textElbouaanani, Lalla Kenza. "Contribution à l'étude des propriétés structurales et magnétiques de phosphates et silicophosphates de fer." Nancy 1, 2000. http://www.theses.fr/2000NAN10023.
Full textStructural and magnetic properties of iron phosphates and silicophosphates have been investigated. The compounds have been characterised by X-ray and neutron diffraction as well as magnetization measurements and Mössbauer spectroscopy. The crystallographic structure of C-Fe(PO3)3 shows that Fe3+ ions are in isolated octahedra, related by infinite cbains of PO4 tetrahedra. This compound is antiferromagnetic below 10 K, in spite of an average distance Fe-Fe higher than 5,5 A, showing the occurence of Fe-O-P-O-Fe superexchange interactions. In Fe4(P2O1)3, the arrangement of FeO6 octahedra in face-sharing Fe2O9 dimers, , yields strong antiferromagnetic Fe3+-Fe3+ direct interactions, which dominates in respect to the frustrated Fe-O-P-O-Fe superexchange interactions. Fe2P2O7 is characterised by a bidimensionnel stacking of iron atoms as deformed Kagomé network. The FeO6 octahedra are connected by P2O7 units. The structural and magnetic studies agree with the coexistence of two Fe2 + sublattices, ordering below TN = 18 K. At 2 K, within the layers, the dominating Fe2+_Fe2+ interactions are ferromagnetic along the chains, and antiferromagnetic between the chains. The evidence of a threshold field in the magnetization curve confirms a low dimensionality magnetic character. An incommensurate magnetic structure is proposed in the 11-18 K range, probably related to the existence of frustrated interactions. In the silicophosphates, FeO6 octahedra are connected orny via PO4 tetrahedra. For the ferric FeP3SiO11 and Fe3P5SiO19 compounds, the appearance of silicon in the three-dimensional networks seems to be favored by the formation of "Si2P6O25" units. The magnetic behaviour of Fe3P5SiO19 is similar to Fe4(P2O7)3, the dominating interactions are AF within Fe2O9 dimers. Fe2SiP4O14 presents, like Fe2P2O7, layers of FeO6 octahedra sharing edges. However, Fe2SiP4O14 is paramagnetic until 1. 3 K due to unfavourable overlapping via two PO4 and a SiO4 groups. The characterization of these new silicophosphates compounds open new prospects for a better understanding of the poorly explored Fe-P-Si-O system
Ben, slimen Fedia. "Caractérisation des verres luminescents préparés par la méthode sol-gel." Thesis, Angers, 2016. http://www.theses.fr/2016ANGE0019/document.
Full textGlasses doped with rare earth ions and/or semiconductor nanoparticles continues to be the subject of several studies due to their effectiveness in optoelectronic fields. Indeed, these materials are among the potential candidates for photonic applications such as optical fiber amplifiers, light converters, sensors and 3D waveguides. As part of this thesis, silica-based glasses (SiO2) doped with europium ions (Eu3+) were prepared by the sol-gel process. In order to better disperse the rare earth ions and improve their emission, the glasses were codoped with phosphorus and/or aluminum. Semiconductor nanoparticles (CdS) were also introduced into the glass in order to increase the absorbance of the excitation light and to obtain a more intense emission of Eu3+ ions. The prepared glasses were analyzed by photoluminescence and by the technique of Fluorescence line narrowing (FLN). These experimental measurements were followed by theoretical simulations using the molecular dynamics method (DM) to study the effect of phosphorus and/or aluminum on the local environment of the europium ions and their dispersion in the vitreous matrix. The presence of two types of europium ion sites in the glass silicophosphates has been demonstrated and confirmed by two techniques (FLN and DM). The effect of CdS nanoparticles on the emission of Eu3+ ions in a glass silicophosphate was also studied and it was shown that the emission of Eu3+ ions is considerably dependent on theconcentration of CdS nanoparticles and annealing temperature
McDonald, Andrew Michael Carleton University Dissertation Geology. "The crystal structures of three minerals: phosinaite-(Ce), abenakiite-(Ce) and yoshimuraite, with remarks on the crystal chemistry of silicophosphates." Ottawa, 1992.
Find full textCoelho, Cristina. "Matériaux silicophosphate et RMN en phase solide : apport des expériences dipolaires (D) et scalaires (J)." Paris 6, 2007. http://www.theses.fr/2007PA066129.
Full textSpannagel, Philippe. "Contribution à l'étude du système silicate décalcique-phosphate tricalcique et son intérêt dans la caractérisation et la valorisation de scories d'aciéries." Nancy 1, 1996. http://www.theses.fr/1996NAN10371.
Full textLU, CHIEN-MING, and 呂健銘. "Effect of phase-separation on the glass structure and spectroscopic properties of Eu-doped sodium silicophosphate glasses." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86139446780966621477.
Full text國立聯合大學
材料科學工程學系碩士班
95
Abstract The effect of glass phase-separation on the spectroscopic properties and glass structure with 42SiO2-36P2O5-16Na2O-6Al2O3-xEu2O3 composition were investigated. The glasses were prepared by rapid quenching of the 1450˚C melts. The changes of the local environment of Eu3+ ions in the host matrix were analyzed by UV-Vis spectrometer and photoluminescence spectroscopy. The glass transition temperature and dilatometric softening temperature were determined by TMA. SEM has been used to examine the microstructure of the glass samples heat-treated at various period of time. The glass chemical structure change was also determined by FTIR. The experimental results indicate that the glass transition temperature (Tg), glass softening temperature (Td),density, and chemical durability increase with increasing rare-earth content in the glass composition. The microstructure of the phase-separated glass apparently shows meta-stable decomposition when heat-treated at 600˚C. For the same glass sample, the intensity of photoluminescence increases as the heating time prolonged. The intensity of the emission peak at 5D0→7F2 was increased by a factor of 11 after the glass sample been heat-treated at 600oC for 100 hr. It is found that Eu3+ ion is more preferable to stay in a loose glass network such as the phosphate-rich phase after phase separation. In terms of the photoluminescence intensities, the Eu3+ ions in phosphate-rich phase contribute more emission energy than those in silica-rich phase.
Schöneborn, Marcos [Verfasser]. "Gruppentheoretische Behandlung kristallchemischer und kristallographischer Probleme : Synthese und Kristallstrukturen polynärer Phosphate und Silicophosphate des Titans / vorgelegt von Marcos Schöneborn." 2008. http://d-nb.info/990948374/34.
Full textBooks on the topic "Silicophosphates"
Han, Xue-Song. Studies on the synthesis of silicoaluminophosphates and silicophosphates. Wolverhampton: University of Wolverhampton, 2002.
Find full textBook chapters on the topic "Silicophosphates"
Grabco, D., O. Shikimaka, M. Elisa, B. Sava, L. Boroica, E. Harea, C. Pyrtsac, et al. "Effect of Spin Coating Technique on Mechanical Properties of Silicophosphate Thin Film Doped by Neodymium." In 3rd International Conference on Nanotechnologies and Biomedical Engineering, 89–92. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-736-9_21.
Full textPrabakar, S., K. J. Rao, and C. N. R. Rao. "A MAS NMR investigation of aluminosilicate, silicophosphate, and aluminosilicophosphate gels and the evolution of crystalline structures on heating the gels." In Solid State Chemistry, 120–29. WORLD SCIENTIFIC, 1995. http://dx.doi.org/10.1142/9789812795892_0008.
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