Pengaruh Suhu Sintering terhadap Pembentukan Senyawa Gd0,95La0,05Ba1,95Sr0,05Cu3O7-?

Abstract

Research has been conducted variations in sintering temperature between 900 ºC – 950 ºC for 12 hours on the synthesis phase of Gd1Ba2Cu3O7-d substituted La and Sr with stoichiometric composition Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d. This study is intended to find out at what temperature the compound Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d can be formed to the maximum. Samples with composition Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d made from the raw materials Gd2O3, La2O3, BaO, Sr2O3 and CuO. Samples are synthesized using solid-state reaction method by wet mixing with nitric acid (HNO3) as solvent. The sample is sintering in the form of pellets in the furnace without annealing of oxygen gas. The synthesis results were characterized by X-Ray Diffraction (XRD) and analyzed with the Match-3 Program. By using the Entry number 96-153-9606, the results of it analysis showed that sintering temperature had an impact on the formation of phase compounds Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d. Show that the volume fraction is increases with increasing of the sintering temperature, especially from temperatures of 930 ºC to 950 ºC. The highest volume fraction of 75,4263 % was obtained in samples that sintering at 950 ºC. Refinement results with Rietveld analysis method showed phase Gd0,95La0,05Ba1,95Sr0,05Cu3O7-d formed is in orthorhombic symmetry. The volume of cell units is likely to increase as the temperature increases.