Sukkha, Usa
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Item type:Publication, Influence of Pb(In1/2Nb1/2)O3 on the phase transitions, electrical, and thermal properties of a PbZrO3 ceramic(2011-10-01); ; ;Niemcharoen, Surasak; The solid solution of a (1-x)PbZrO<inf>3</inf>-xPb(In<inf>1/2</inf>Nb <inf>1/2</inf>)O<inf>3</inf> (PZ-PIN) system, with x=0.00-0.50, was synthesized using the wolframite precursor method. The effects of the PIN content on the crystal structure, and the electrical and thermal properties of a PbZrO <inf>3</inf> ceramic were investigated using X-ray diffraction, dielectric spectroscopy, hysteresis measurement, and differential scanning calorimetry techniques. Furthermore, the morphology and grain size were determined using scanning electron microscopy. The results indicated that the pure perovskite phase was obtained for all compositions, and the solid solution, PZ-PIN, changed from orthorhombic to rhombohedral symmetry when the amount of PIN increased. A ferroelectric intermediate phase began to appear between the paraelectric and the antiferroelectric phases of pure PZ, with increasing PIN content. The temperature range width of the ferroelectric phase also increased continuously with increasing PIN. At room temperature, the polymorphic phase transition (PPT) was identified from the orthorhombic to the rhombohedral phase in (1-x)PZ-xPIN at the composition, x=0.40. The ceramics (x=0.40) with PPT close to room temperature exhibited excellent electrical properties (ε<inf>rmax</inf>= 33240 and P<inf>r</inf>=26.94 μC/cm<sup>2</sup>). © 2011 The American Ceramic Society. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Pb(Y1/2Nb1/2)O3 additions on thermal and electrical properties of PbZrO3 ceramics(2011-07-29); ; ;Niemcharoen, Surasak; The solid solution of a (1-x)PbZrO<inf>3</inf> - xPb(Y<inf>1/2</inf>Nb <inf>1/2</inf>)O<inf>3</inf> (PZ - PYN) system, with x = 0.00 - 0.08, was synthesized by the wolframite precursor method. The effects of PYN content on crystal structure, and electrical and thermal properties of PbZrO<inf>3</inf> ceramic were investigated. The crystal structure of sintered ceramics was characterized by X-ray diffraction. The pure perovskite phase was obtained for all compositions. The transition temperatures of the AFE to PE phase become lower with PYN increase. The dielectric properties of PZ were improved by the addition of PYN. Copyright © Taylor & Francis Group, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Phase transition behavior of the (1-x) PbZrO 3-x Ba (Al 1/2 Nb 1/2) O 3 solid solution(2012-10-01); ; ; ;Niemcharoen, SurasakSolid solution of the (1-x)PbZrO <inf>3</inf>-xBa(Al <inf>1/2</inf>Nb <inf>1/2</inf>)O <inf>3</inf> system, with x = 0.02-0.30, was prepared using solid state reaction. The effect of Ba(Al <inf>1/2</inf>Nb <inf>1/2</inf>)O <inf>3</inf> on phase transitions and thermal and electrical properties was investigated. The stability of ferroelectric phase in pure PZ was found to improve with increasing BAN content, which corresponded to the increased tolerance factor (t) of solid solution. In comparison to other systems, results in this study indicated that the tolerance factor can predict the ferroelectric (FE)/antiferroelectric (AFE) stability of PZ-based solid solution. If the t value of solid solution is higher than pure PZ, the FE phase can be induced. On the other hand, the AFE phase is stabilized when the t value of solid solution is lower than pure PZ. © 2012 The American Ceramic Society. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of A-site and B-site ion replaced with small ions on the intermediate phase in PbZrO3 ceramic(2014-02-14); ; ; ;Niemcharoen, SurasakThe solid solution of (1 - x)PbZrO<inf>3</inf>-xNaNbO<inf>3</inf> ceramics, where x = 0.0-0.08, was synthesized by solid state reaction. The basic characterizations were performed using X-ray diffraction (XRD), dielectric spectroscopy, hysteresis measurement and differential scanning calorimetry (DSC) techniques. The results indicated that the crystal structure of the solid solution, (1 - x)PZ-xNN, where x = 0.00-0.08, is of orthorhombic symmetry. It was found that the effect of NN being replaced with small ions at the A-site and B-site can induce an AFE-like phase in PZ. The FE intermediate phase of PZ cannot be induced, although Zr<sup>4+</sup> ions were substituted by small Nb<sup>5+</sup> ions. This is due to the decreasing average rate of radii in the A-site (0.1 Å mol<sup>-1</sup>) being higher than that in the B-site (0.08 Å mol<sup>-1</sup>). © 2013 Elsevier B.V. All rights reserved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of BiYbO3 Addition with a Small Tolerance Factor on Ferroelectricity and TC in PbZrO3 Ceramics(2015-10-08); ;Niemcharoen, Surasak; ;Guo, RuyanBhalla, Amar S.Perovskite (Pb(1-3x/2) Bi<inf>x</inf>)(Zr(1-3<inf>x/4</inf>) Yb<inf>x</inf>)O<inf>3</inf> (PZ-BY) ceramics, where x = 0.01-0.10, were synthesized by conventional solid state reaction. The effect of BiYbO<inf>3</inf> on crystal structure, phase transitions and electrical properties was studied as a function of composition. The X-ray diffraction (XRD) result indicated that the perovskite structure with orthorhombic symmetry was a major phase for all samples. The pyrochlore phase, identified as Yb<inf>0.2</inf>Zr<inf>0.8</inf>O<inf>1.9</inf>, coexists in PZ-BY ceramics. The influence of instability and a small tolerance factor (t) and the average electronegativity difference () of pure BY on phase formation of PZ-BY ceramic has been discussed. Furthermore, it was found that adding small tolerance factor BiYbO<inf>3</inf> compound can stabilize the antiferroelectric (AFE) phase of PZ solid solutions and decreasing t of solid solution can enhance Curie temperature of PZ. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Pb (Yb 1/2Nb 1/2)O 3 on phase transition and thermal and electrical properties of PZ-PYbN solid solution on PZ-rich side(2012-02-01); ; ;Niemcharoen, Surasak; The (1 - x)PbZrO <inf>3</inf>-xPb(Yb <inf>1/2</inf>Nb <inf>1/2</inf>)O <inf>3</inf> (PZ-PYbN) ceramics, with the compositions, x = 0.00-0.50, were prepared by the wolframite precursor method. The crystal structure and electrical and thermal properties of PbZrO <inf>3</inf> ceramic were investigated as a function of the composition, x, using X-ray diffraction, dielectric spectroscopy, hysteresis measurement and differential scanning calorimetry techniques. The results indicated that the solid solution, PZ-PYbN, changed from orthorhombic to rhombohedral symmetry when the amount of PYbN increased. The pyrochlore phase identified as Yb/Nb mixed compound was observed at the composition, x ≥ 0.2. For the compositions, x = 0.00-0.10, ceramics showed a sharp phase transition from AFE to PE. Furthermore, the intermediate FE phase was absent from the PZ-PYbN system. © 2011 Springer Science+Business Media, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Pb(Ni1/2W1/2)O3 on the phase transition behavior of PbZrO3 ceramic(2013-01-01); ; ; ;Niemcharoen, SurasakKarbkaew, AmornthepSolid solution of (1-x)PbZrO<inf>3</inf>-xPb(Ni<inf>1/2</inf>W <inf>1/2</inf>)O<inf>3</inf>;(1-x)PZ-xPNW ceramics, where x = 0.02-0.10, were prepared by solid state reaction. Dense (1-x)PZ - xPNW ceramics were obtained by sintering at 1,100?C for 4 h. Effect of PNW on crystal structure, phase transitions and thermal and electrical properties was investigated using X-ray diffraction, dielectric spectroscopy, hysteresis measurement and differential scanning calorimetry. The results indicated that the solubility limit of the (1-x)PZ-xPNW system was found at x = 0.04. It was proved that the intermediate phase is an antiferroelectric in the PZ-PNW system. Stability of the AFE intermediate phase was seen to improve with increasing PNW content. Copyright © 2013 Taylor & Francis Group, LLC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Antiferroelectric-ferroelectric phase transition in lead zinc niobate modified lead zirconate ceramics: Crystal studies, microstructure, thermal and electrical properties(2010-08-01); ; ;Niemcharoen, Surasak; The combination of antiferroelectric PbZrO<inf>3</inf> (PZ) and relaxor ferroelectric Pb(Zn<inf>1/3</inf>Nb<inf>2/3</inf>)O<inf>3</inf> was prepared via the columbite precursor method. The basic characterizations were performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), linear thermal expansion, differential scanning calorimetry (DSC) techniques, dielectric spectroscopy, and hysteresis measurement. The XRD result indicated that the solid solubility limit of the (1-x)PZ-xPZN system was about x = 0.40. The crystal structure of (1-x)PZ-xPZN transformed from orthorhombic to rhombohedral symmetry when the concentration of PZN was increased. A ferroelectric intermediate phase began to appear between the paraelectric and antiferroelectric phases of pure PZ, with increasing PZN content. In addition, the temperature range of the ferroelectric phase increased with increasing PZN concentration. Themorphotropic phase boundary (MPB) in this system was located close to the composition, x = 0.20. © 2010 Springer-Verlag.
