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-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