Vittayakorn, Naratip
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Preferred name
Vittayakorn, Naratip
Alternative Name
Vittayakorn, N.
Vittayakorn, Narathip
Main Affiliation
Email
naratip.vi@kmitl.ac.th
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Item type:Publication, Preparation of lead zirconate-lead nickel niobate ceramics by the reaction sintering process(2009-12-01); ; ; Laoratanakul, PitakThe perovskite structure of lead zirconate - lead nickel niobate ceramics, (1-x) PbZrO3-xPb(Ni1/3Nb2/3)O3 (PZ - PNN) at x between 0.00-0.50, has been prepared by the reaction-sintering process. The specimens were prepared directly from a mixture of their constituent oxide without any calcination step. The PZ - PNN ceramics could be obtained after 6 h sintering at 1,100-1,250°C. Crystal structure and phase transition of PZ-PNN were investigated by x-ray diffraction (XRD). XRD indicated that the structure of PZ-PNN ceramics is orthorhombic for a composition where x = 0.00, rhombohedral for compositions where x = 0.10 ≤ x ≤ 0.40 and pseudo-cubic for a composition where x = 0.50. The dielectric properties of the ceramics were measured as functions of both temperature and frequency. The results indicated that the transition temperature decreases with increasing PNN concentration. Furthermore, morphology and grain size evolution have been determined via a scanning electron microscope (SEM). Copyright © Taylor & Francis Group, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Synthesis, ferroelectric phase stabilization, phase transition and thermal properties in (1-x)PbZrO3-xPb(Zn1/3Nb2/3)O 3 solid solution(2009-12-01); Banlue, WanwimonThe solid solution between the antiferroelectric PbZrO3 (PZ) and relaxor ferroelectric Pb(Zn1/3Nb2/3)O3 (PZN) was synthesized by the columbie method. The phase structure and thermal properties of (1-x)PZ-xPZN, where x = 0.00-0.30, were investigated. The crystal structure of the sintered ceramics was investigated as function of composition via x-ray diffraction (XRD) and Differential scanning calorimetry (DSC). The results indicated that the solid solution, PZ-PZN, successively transforms from orthorhombic to rhombohedral symmetry with an increase in PZN concentration. The AFE→FE phase transition was found in the compositions of 0.00 ≤ x ≤ 0.20, and its temperatures were decreased by increasing the concentration of PZN. Furthermore, the temperature range width of the FE phase was increased by increasing the amount of PZN. This interruption caused the appearance of a rhombohedral ferroelectric phase when the amount of PZN was more than 20 mol%. Copyright © Taylor & Francis Group, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Synthesis and morphology evolution of lead-free piezoelectric K 1/2Na1/2NbO3 powder at low temperature(2009-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Crossover from antiferroelectric to normal ferroelectric behavior in lead zirconate - lead nickel niobate ceramics prepared by the reaction sintering process(2009-12-01); The lead zirconate - lead nickel niobate ceramics, (1-x)PbZrO3 - xPb(Ni1/3Nb2/3)O3 (PZ-PNN) with x = 0.00-0.10, have been prepared by reaction sintering. Without any calcination involved, the mixture of raw materials was pressed and sintered directly. The PZ-PNN ceramics could be obtained after 6 h sintering at 1,100-1,250°C. The crystal structure data obtained from XRD indicate that the PZ-PNN, where x = 0.00-0.10, successively transforms from orthorhombic to rhombohedral symmetry with an increase in the PNN concentration around x = 0.08. The antiferroelectric phase (AFE) → ferroelectric phase (FE) transition occurs in compositions of 0.0 ≤ x ≤ 0.08. The AFE → FE phase transition shifts to lower temperatures with higher compositions of x. The FE phase temperature range width increases with increased PNN. Copyright © Taylor & Francis Group, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Pb(Zn1/3Nb2/3)O3 additions on phase structure, ferroelectric and dielectric properties of PbZrO3 ceramics(2009-12-01)