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ZnO varistors with and without surfactant such as sodium dodecyl sulphate (SDS) are prepared by nitrate-combustion process. The samples were identically heat treated and sintered at 1000°C for 12h to study the influence of the surfactant on the nonlinear electrical properties of polycrystalline ZnO. It is observed that the nonlinear coefficient decreases marginally (α=35) for samples prepared with...
A gel was formed when an aqueous solution of CaCl 2 , BiNO 3 , TiOCl 2 and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 700°C produced nano crystallites of the ternary oxide, CaBi 4 Ti 4 O 15 (CBT). The phase contents and lattice parameters were studied by the powder X-ray diffraction (XRD). Particle size...
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