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Ismunandar Ismunandar
Inorganic and Physical Chemistry Research Division, Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung, Bandung
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Sintesis Oksida Aurivillius Sr2Bi4Ti5-xFexO18 (x = 0,25; 0,5; 0,75; dan 1) Rolan Rusli; Ismunandar Ismunandar
Journal of Tropical Pharmacy and Chemistry Vol. 1 No. 1 (2010): Journal of Tropical Pharmacy and Chemistry
Publisher : Faculty of Pharmacy, Universitas Mulawarman, Samarinda, Indonesia, 75117, Gedung Administrasi Fakultas Farmasi Jl. Penajam, Kampus UNMUL Gunung Kelua, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (72.294 KB) | DOI: 10.25026/jtpc.v1i1.9

Abstract

Aurivillius oxides Sr2Bi4Ti5-xFexO18 have been synthesized using the solid state reaction method. Powder X-ray diffraction data were refined using Le Bail method implemented in Rietica have space group B2cb, Z = 4, and parameter cell are a = 5.542(8), b = 5.474(9), c = 48.947(1); a = 5.565(5), b = 5.491(9), c = 49,097(1); a = 5.533(7), b = 5.464(7), c = 48.595(2) and a = 5.621(1), b = 5.492(9), c = 49.78(4); respectively for x = 0.25, 0.5, 0.75, and 1. The substitution of cation Fe3+ in these Aurivillius oxides was showed increasing of magnetic moment are μ = 2.67, 3.21, 3.98, and 4.62 for x = 0.25, 0.5, 0.75, and 1 respectively. Keywords: Aurivillus oxide, solid state reaction, Le Bail method, magnetic moment ABSTRAK Oksida Aurivillius Sr2Bi4Ti5-xFexO18 telah disintesis dengan menggunakan metode reaksi kimia padat. Data difraksi sinar-x serbuk yang penghalusan strukturnya menggunakan metode rietveld dengan program rietica menunjukkan bahwa oksida ini memiliki grup ruang B2cb, Z = 4, dan parameter selnya adalah a = 5,542(8), b = 5,474(9), c = 48,947(1); a = 5,565(5), b = 5,491(9), c = 49,097(1); a = 5,533(7), b = 5,464(7), c = 48,595(2) dan a = 5,621(1), b = 5,492(9), c = 49,78(4); berturut-turut untuk x = 0.25; 0,5; 0,75; dan 1. Substitusi kation Fe3+ pada oksida Aurivillius ini menunjukkan terjadinya peningkatan momen magnet oksida ini yaitu μ = 2,67; 3,21; 3,98; dan 4,62 berturut-turut untuk x = 0,25; 0,5; 0,75; dan 1. Kata kunci: Oksida Aurivillius, reaksi kimia padat, metode Le Bail, momen magnet
Synthesis and Characterization of Bi2TixV1-xO5.5-δ as Electrolyte Material in Solid Oxide Fuel Cell Bambang Prijamboedi; Citra Deliana Dewi Sundari; Rolan Rusli; Ismunandar Ismunandar
Indonesian Journal of Physics Vol 22 No 3 (2011): Vol. 22 No. 3, July 2011
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (704.45 KB) | DOI: 10.5614/itb.ijp.2011.22.3.4

Abstract

Oxide materials of Bi2TixV1-xO5,5-δ have been synthesized by means of conventional solid state reaction method. Substitution of Ti atom for the V sites leads to the formation of single phase Bi2TixV1-xO5,5-δ material with I4/mmm space group of tetragonal structure as well as gives results in large grain size and good sinterability of the ceramic material. With Ti concentration of x = 0.2, sample without the presence of porous could be obtained. The ionic conductivity of Bi2TixV1-xO5,5-δ increases significantly with the presence of Ti atoms. This Ti substitution also reduces phase transition temperatures in Bi2TixV1-xO5,5-δ materials. The conductivity data and scanning electron microscope images show that the Ti concentration in Bi2TixV1-xO5,5-δ could be applied as much as x = 0.2, which is higher than reported before and it still gives better properties.
Co-Authors Bambang Prijamboedi Citra Deliana Dewi Sundari Rolan Rusli