01531nas a2200289   4500008004100000022001400041245005700055210005600112260007300168300001200241490000700253520066600260653001100926653001300937653002300950653002400973653001100997653002201008100001901030700001801049700001601067700001901083700002101102700001401123700001301137856009101150       2008                        eng d  a0167-577X00aCo-precipitation technique to prepare BiTaO4 powders0 aCoprecipitation technique to prepare BiTaO4 powders  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a501-5030 v623 a<p>A simple co-precipitation technique has been successfully used for the preparation of pure ultrafine single phase BiTaO4. A standard ammonium hydroxide solution was used to precipitate Bi3+ and Ta5+ cations as hydroxides simultaneously under basic conditions. This precursor, on heating at 600 degrees C, produced product phase. This is the lowest temperature for the formation of BiTaO4 phase so far reported in the literature. For comparison BiTaO4 powders were also prepared by the traditional solid state method. The phase contents and lattice parameters were studied by the powder X-ray diffraction (XRD). (c) 2007 Elsevier B.V. All rights reserved.</p>10aBiTaO410aCeramics10aChemical synthesis10aElectron microscopy10aOxides10aX-ray diffraction1 aMuthurajan, H.1 aGupta, U., N.1 aRituraj, B.1 aRao, Koteswara1 aPradhan, Sivaram1 aRadha, R.1 aRavi, V.  uhttps://library.ncl.res.in/content/co-precipitation-technique-prepare-bitao4-powders-001091nas a2200205   4500008004100000022001400041245013000055210006900185260008400254300001200338490000700350520026900357100002100626700001900647700002700666700001900693700001600712700002700728856013000755       2008                        eng d  a0366-702200aFacile single-step technique for simultaneous in situ fabrication of Ag/Ag2S-polymer nanocomposites via PPS cyclization route0 aFacile singlestep technique for simultaneous in situ fabrication  a1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPANbCHEMICAL SOC JAPANcFEB  a194-1950 v373 a<p>We herein propose a facile single-step approach involving solid-state reaction between silver salt and engineering thermoplastic polyphenylene sulfide for simultaneous in situ generation of nanoscale metallic silver as well as semiconducting silver sulfide.</p>1 aWaghmare, Sujata1 aShinde, Manish1 aGholap, Ramkrishna, S.1 aRao, Koteswara1 aSeth, Tanay1 aAmalnerkar, Dinesh, P.  uhttps://library.ncl.res.in/content/facile-single-step-technique-simultaneous-situ-fabrication-agag2s-polymer-nanocomposites-001785nas a2200301   4500008004100000022001400041245006900055210006900124260007900193300001400272490000700286520083700293653001101130653001301141653002301154653002401177653001101201653002201212100001401234700001901248700001901267700002101286700001801307700002401325700001801349700001301367856010301380       2008                        eng d  a1044-580300aLow temperature synthesis and characterization of BiNbO4 powders0 aLow temperature synthesis and characterization of BiNbO4 powders  a360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USAbELSEVIER SCIENCE INCcAUG  a1083-10870 v593 a<p>BiNbO4 powders, a potential microwave dielectric ceramic were prepared by both coprecipitation and solid state techniques. In the former method, an aqueous ammonium hydroxide was used to precipitate Bi3+ and Ta5+ cations as hydroxides simultaneously under basic conditions. It is observed that the co-precipitation produces BiNbO4 phase on heating at 600 degrees C, whereas complete phase formation occurs only at 800 degrees C in the case of solid state method. The phase contents and lattice parameters were studied by powder X-ray diffraction. The sequence of the reaction and phase evolution of BiNbO4 were also studied by the X-ray diffraction. The samples were characterized by the differential-thermal/thermo-gravimetric analyses and scanning electron microscopy techniques. (C) 2007 Elsevier Inc. All rights reserved.</p>10aBiNbO410aCeramics10aChemical synthesis10aElectron microscopy10aOxides10aX-ray diffraction1 aRadha, R.1 aMuthurajan, H.1 aRao, Koteswara1 aPradhan, Sivaram1 aGupta, U., N.1 aJha, Ratnesh, Kumar1 aMirji, S., A.1 aRavi, V.  uhttps://library.ncl.res.in/content/low-temperature-synthesis-and-characterization-binbo4-powders-002155nas a2200289   4500008004100000022001400041245008800055210006900143260010600212300001400318490000700332520116500339653001301504653002301517653002401540653001101564653002201575100001901597700001901616700001801635700002101653700002401674700001801698700001801716700001301734856011801747       2008                        eng d  a0025-540800aNovel hydroxide precursors for low temperature synthesis of selected ternary oxides0 aNovel hydroxide precursors for low temperature synthesis of sele  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJUL  a1842-18490 v433 a<p>A novel method of using hydroxide precursors to reduce the synthesis temperature for few selected ternary oxides has been presented here. This technique is very useful and advantageous when the ternary oxides contain an alkaline earth element. The selected compositions for this method are BaCeO3 (BC), BaBiO3 (BB), La0.7Sr0.3CoO3 (LSCO) and BaBi2Nb2O9 (BBN). Commercially purchased strontium (or barium) hydroxide and freshly prepared lanthanum, cobalt, bismuth and niobium hydroxides were mixed thoroughly in stoichiometric ratio and heated at different temperatures ranging from 100 to 700 degrees C for 10 h for corresponding compositions. The sequence of the reaction and evolution of the product phase were studied by the X-ray diffraction (XRD) studies. The phase purity and lattice parameters were also determined by XRD investigations. All the product phases in each case were formed at relatively low temperature than when they were prepared by co-precipitation or solid state method. The morphology and average particle size of these powders were investigated by scanning electron microscopy (SEM). (C) 2007 Elsevier Ltd. All rights reserved.</p>10aCeramics10aChemical synthesis10aElectron microscopy10aOxides10aX-ray diffraction1 aMuthurajan, H.1 aRao, Koteswara1 aGupta, U., N.1 aPradhan, Sivaram1 aJha, Ratnesh, Kumar1 aKumar, H., H.1 aMirji, S., A.1 aRavi, V.  uhttps://library.ncl.res.in/content/novel-hydroxide-precursors-low-temperature-synthesis-selected-ternary-oxides-001533nas a2200277   4500008004100000022001400041245008000055210006900135260007300204300001200277490000700289520063100296653001300927653002400940653002100964653001100985653001800996653002201014100001801036700001901054700001801073700001901091700002401110700001301134856010801147       2008                        eng d  a0167-577X00aSynthesis of LSMO at low temperature by novel hydroxide precursor technique0 aSynthesis of LSMO at low temperature by novel hydroxide precurso  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a527-5290 v623 a<p>A novel technique of mixing individual hydroxide is employed to prepare La0.65Sr0.35MnO3 (LSMO) at low temperature. Freshly prepared lanthanum and manganese hydroxides are mixed thoroughly with strontium hydroxide in stoichiometric ratio and heated at different temperatures ranging from 100 to 500 degrees C for 6 h. At 500 degrees C, formation of La0.65Sr0.35MnO3 was confirmed by the X-ray diffraction studies (XRD). This is the lowest temperature so far reported in the literature. The particle size and morphology were investigated by scanning electron microscopy (SEM). (c) 2007 Elsevier B.V. All rights reserved.</p>10aCeramics10aElectron microscopy10aLa0.65Sr0.35MnO310aOxides10aPrecipitation10aX-ray diffraction1 aGupta, U., N.1 aMuthurajan, H.1 aKumar, H., H.1 aRao, Koteswara1 aGokhale, Suresh, P.1 aRavi, V.  uhttps://library.ncl.res.in/content/synthesis-lsmo-low-temperature-novel-hydroxide-precursor-technique-002468nas a2200277   4500008004100000022001400041245012500055210006900180260009200249300001200341490000600353520143300359653000701792653000901799653001801808653004401826653003301870100002101903700001901924700002701943700001901970700002501989700002102014700002702035856012802062       2009                        eng d  a1662-525000aConcurrent In-situ formation of Ag/Ag2S nanoparticles in polymer matrix by facile polymer-inorganic solid state reaction0 aConcurrent Insitu formation of AgAg2S nanoparticles in polymer m  aLAUBISRUTISTR 24, STAFA-ZUERICH, CH-8712, SWITZERLANDbTRANS TECH PUBLICATIONS LTDcJAN  a143-1520 v53 a<p>We herein report the feasibility of polymer-inorganic solid-state reaction route for simultaneous in situ generation of Ag &amp; Ag2S nanostructures in polymer network wherein an engineering thermoplastic, polyphenylene sulphide (PPS), itself acts as a chalcogen source as well as a stabilizing matrix for the resultant nanoproducts. Typical solid-state reaction was accomplished by simply heating the physical admixture of the two reactants i.e. AgNO3 and PPS by varying molar ratios mainly 1:1, 1:5, 1:15, 1:20, at the crystalline melting temperature (285 degrees C) of PPS. The synthesized nanoparticles were characterized by various physico-chemical techniques like X-ray Diffractometry, Scanning Electron Microscopy equipped with EDAX, Transmission Electron Microscopy and UV-Visible spectroscopy. The prima facie observations suggest the effective formation and subsequent entrapment of mainly nanocrystalline metallic silver (fcc) in PPS matrix for all the molar ratios chosen for the reaction. Additionally, simultaneous occurrence of nanocrystalline Ag2S (monoclinic phase) is also noticed in case of heated admixture of AgNO3: PPS with equimolar ratio. The TEM analysis reveals nanoscale polydispersity (5nm to 70nm) and prevalence of mainly spherical morphological features in all the cases with occasional indications of triangular and hexagonal morphological features depending upon the reaction molar ratio.</p>10aAg10aAg2S10aNanoparticles10aPolymer inorganic solid -state reaction10aThermoplastic polymer matrix1 aWaghmare, Sujata1 aShinde, Manish1 aGholap, Ramkrishna, S.1 aRao, Koteswara1 aHawaldar, Ranjit, R.1 aMulik, Uttam, P.1 aAmalnerkar, Dinesh, P.  uhttps://library.ncl.res.in/content/concurrent-situ-formation-agag2s-nanoparticles-polymer-matrix-facile-polymer-inorganic-0