Synthesis of Anisotropic Lead Titanate Powders for Templated Grain Growth of Textured Piezoelectric Ceramics

Ma, Sha; Fuh, Jerry Ying Hsi; Zhang, Y. F.; Liang, Lu

doi:10.1142/s0218625x10013631

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…The size and morphology of the rod-shaped TiO 2 templates were retained in the synthesized PTO particles. Similarly, needle-like PTO powders were also synthesized via template MSS method, where pure needle-like TiO 2 particles were used as the templates [18]. The needle-like PTO particles synthesized by template MSS method at 800 °C had a length of 30–100 μm and diameters of 500 nm–2.0 μm.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterizations and Dielectric Properties of Sphere- and Rod-Like PbTiO3 Powders Synthesized via Molten Salt Synthesis

Xue

et al. 2019

Nanoscale Res Lett

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By reaction of PbC 2 O 4 and TiO 2 in the eutectic NaCl-KCl salts, both sphere- and rod-like PbTiO 3 (PTO) powders were synthesized via molten salt synthesis (MSS) and template MSS methods, respectively. X-ray diffraction patterns reveal that all the PTO powders crystallize in a tetragonal phase structure. Increasing the molar ratio of PbC 2 O 4 :TiO 2 :NaCl:KCl from 1:1:10:10 to 1:1:60:60 in the MSS process has little effect on the sphere-like morphology of the PTO powders synthesized at 950 °C for 5 h. Large-scale polycrystalline rod-like PTO powders with diameters of 480 nm–1.50 μm and lengths up to 10 μm were synthesized at 800 °C for 5 h by template MSS method, where the rod-like anatase TiO 2 precursors were used as templates and the molar ratio of PbC 2 O 4 :TiO 2 :NaCl:KCl was equal to 1:1:60:60. X-ray energy dispersive spectroscopy spectra reveal that all the PTO powders are composed of Pb, Ti, and O elements, and the measured Pb:Ti atomic ratios are close to 1:1. In the template MSS process, the molten salt content plays an important role in forming the rod-like PTO powders. Under low molten salt content, the rod-like PTO powders cannot be synthesized even if the rod-like TiO 2 templates are used. In addition, prolonging the reaction time suppressed the formation of rod-like PTO powders but promoted the formation of sphere-like PTO nanoparticles. The dielectric properties the sphere- and rod-like PTO powders were comparatively investigated. At room temperature, the dielectric constant and dielectric loss of the spherical PTO powders synthesized by MSS method with the molar ratio of PbC 2 O 4 :TiO 2 :NaCl:KCl equal to 1:1:30:30 were ~ 340 and 0.06 (measured at 10 6 Hz), respectively. The corresponding values for the rod-like PTO powders synthesized by template MSS method with the molar ratio of PbC 2 O 4 :TiO 2 :NaCl:KCl equal to 1:1:60:60 were 140 and 0.08, respectively. The present results demonstrate the sphere-like PTO powders have better dielectric properties, which have promising applications in the fields of multilayer capacitors and resonators.

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Section: Introductionmentioning

confidence: 99%