caa a22 4500 463230078 CHVBK 20180405153239.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10853-006-1435-3 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1435-3 Preparation of barium strontium titanate using a modified polymeric precursor method [Elektronische Daten] [K. Venkata Saravanan, K. James Raju, M. Ghanashyam Krishna, Anil Bhatnagar] Barium strontium titanate with Ba/Sr ratio of 50/50 (BST5) was prepared using a modified polymeric precursor method. Unlike other methods, it proved to be cost effective since neither moisture sensitive nor costly starting materials were used for the preparation. The optimum preparation condition was established, and it was found that an annealing temperature of 600°C with a dwell time of 20h followed by a heat treatment at 800°C with dwelling time of 4h is enough to obtain well crystallized, phase pure fine powder of BST5. The oxide powder thus obtained was single phased, crystalline with cubic structure. The average lattice constant of the polycrystalline oxide was examined using XRD and it was determined to be 0.3950nm (±0.0003nm). The average crystallite size of the ceramic was found to be about 25-30nm. The reaction pathway, temperature of decomposition of the precursor and the temperature of formation of the oxide was found using the data from the EGA-TGA-MS coupled instrument. TGA data showed about 75% of total weight loss over the entire heating process. The SEM studies showed that the grains were in micrometer size range, having high degree of agglomeration and irregular morphology. This process is interesting as it yields phase pure BST5 ceramic at a temperature of 800°C devoid of secondary phases like (Ba,Sr)2TiO4. Springer Science+Business Media, LLC, 2007 Venkata Saravanan K. School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut James Raju K. School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut Ghanashyam Krishna M. School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut Bhatnagar Anil School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/4(2007-02-01), 1149-1155 0022-2461 42:4<1149 2007 42 10853 https://doi.org/10.1007/s10853-006-1435-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1435-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Venkata Saravanan K. School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut NATIONALLICENCE 700 1- James Raju K. School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut NATIONALLICENCE 700 1- Ghanashyam Krishna M. School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut NATIONALLICENCE 700 1- Bhatnagar Anil School of Physics, University of Hyderabad, 500 046, Hyderabad, India aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/4(2007-02-01), 1149-1155 0022-2461 42:4<1149 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer