Effects of La2O3on the microstructure and piezoelectric properties of PbNb2O6

Kato, Masataka; Kimura, Takeshi

doi:10.1080/00150190108225224

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…The relative density of sample with x =0.060 reaches 97%. Thus, La‐doping suppresses grain growth and largely enhances the relative density of PLTN ceramics, which is similar to that in Pb 1− x La 2 x /3 Nb 2 O 6 systems 15 …”

Section: Resultsmentioning

confidence: 58%

Effects of La on Dielectric and Piezoelectric Properties of Pb_1−xLa_2x/3(Nb_0.95Ti_0.0625)₂ O₆ Ceramics

Men

Liu

Zhang

et al. 2009

Journal of the American Ceramic Society

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Ceramics with the chemical compositions of Pb1−xLa2x/3(Nb0.95Ti0.0625)2O6 (0≤x≤0.060) (PLTN) were prepared by the conventional solid‐state reaction method. X‐ray diffraction analysis indicated that Ti and La doping not only decreased the rhombohedral–tetragonal phase transformation temperature, but also stabilized the orthorhombic phase of PLTN ceramics. All ceramics sintered at 1190°–1250°C had shown the pure orthorhombic ferroelectric phase. La doping suppresses grain growth and inhibits the formation of pores and cracks, resulting in an increase in relative density up to 97%. The amount of La doping to PLTN ceramics obviously affect ceramics' piezoelectric constant (d33) and dielectric loss (tanδ). The sample with x=0.015 possesses high Curie temperature (Tc=560°C), low dielectric loss (tanδ=0.0054), and excellent piezoelectric constant (d33=92 pC/N), presenting a high potential to be used in high‐temperature applications as piezoelectric transducers.

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Section: Resultsmentioning

confidence: 58%

Effects of La on Dielectric and Piezoelectric Properties of Pb_1−xLa_2x/3(Nb_0.95Ti_0.0625)₂ O₆ Ceramics

Men

Liu

Zhang

et al. 2009

Journal of the American Ceramic Society

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“…Doping of other metal elements or element substitution have been demonstrated to be a simple while very effective method for improving the sintering activity as well as the electrical performance of various ceramic materials. Concerning PN, various doping or substitution elements such as Li, Ca, Ba, La, and Mn have been tried . However, by single element doping, it is rather difficult to adjust the many electrical parameters, and the T c is usually reduced.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ferroelectric Phase Stability and High Temperature Piezoelectricity in PN Ceramics via Multisite Co‐Doping

et al. 2015

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The tungsten bronze-type lead metaniobate (PbNb 2 O 6 , PN) is a promising material for high-temperature piezoelectric devices, while its application is limited by the difficulty in fabrication. In this study, the microstructure and electrical properties of Ca-doped PN and Ca, Mn-co-doped PN ceramics sintered at different temperatures were investigated. Doping promoted the formation of the originally metastable ferroelectric orthorhombic phase. This might be partly attributed to the increased lattice distortion of the orthorhombic phase in the doped samples compared to that reported for pure PN. However, in single Asite Ca-doped PN the ferroelectric orthorhombic structure showed a low stability and started to transform to paraelectric phase far below 300°C, resulting in unstable high temperature piezoelectric properties. Interestingly, such a phase transition was completely depressed by A-site Ca and multisite Mn-codoping, which also improved the piezoelectric performance (d 33 = 71 pC/N) and thermal stability in both structure and piezoelectricity. The better stability and performance of the co-doped samples were explained by the improved sintering behavior and poling efficiency as well as its ability to occupy different sites in the TTB lattice.

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“…To date, many efforts have been made to fabricate dense PN-based ceramics via optimizing the sintering process and doping other elements, such as K, Sr, Ba, La, Ti, etc. [16][17][18][19][20] It has been found that single-element doping is not an effective way to improve the sintering behavior in PN ceramics. However, high performance and high density could be obtained through conventional solid-state reaction, when the co-doping occurred in A and B sites simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Excellent temperature stability of piezoelectric properties in PbNb₂O₆‐based ceramics up to 450°C

Jin,

Ren,

et al. 2024

J Am Ceram Soc.

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Dense (Pb0.92Ba0.08)Nb2O6‐xmol% MnO2 with 0.25 wt% TiO2 ceramics with a single orthorhombic phase were synthesized through a conventional solid‐state reaction method. Excellent piezoelectric performance (d33 = 90 pC/N) and low dielectric loss (tan δ = 0.5%) are achieved in Mn‐doped samples. Interestingly, the dielectric anomalies are observed in the temperature range of 300–400°C, which could be completely suppressed through Mn doping. The dielectric anomalies are associated with thermally activated domain wall motion, which could be constrained by the defect dipoles produced by Mn doping. More importantly, all samples experience about 12% performance degradation below 300°C, attributed to an accelerated aging process at elevated temperatures. After thermal aging, the samples exhibit excellent performance stability within the temperature range of 25–450°C, showing no further degradation. The results indicate that the PbNb2O6‐based ceramics are promising high‐temperature piezoelectric materials for piezoelectric devices operating at temperatures up to 450°C.

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Effects of La₂O₃on the microstructure and piezoelectric properties of PbNb₂O₆

Cited by 6 publications

References 3 publications

Effects of La on Dielectric and Piezoelectric Properties of Pb_1−xLa_2x/3(Nb_0.95Ti_0.0625)₂ O₆ Ceramics

Effects of La on Dielectric and Piezoelectric Properties of Pb_1−xLa_2x/3(Nb_0.95Ti_0.0625)₂ O₆ Ceramics

Enhanced Ferroelectric Phase Stability and High Temperature Piezoelectricity in PN Ceramics via Multisite Co‐Doping

Excellent temperature stability of piezoelectric properties in PbNb₂O₆‐based ceramics up to 450°C

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Effects of La2O3on the microstructure and piezoelectric properties of PbNb2O6

Cited by 6 publications

References 3 publications

Effects of La on Dielectric and Piezoelectric Properties of Pb1−xLa2x/3(Nb0.95Ti0.0625)2 O6 Ceramics

Effects of La on Dielectric and Piezoelectric Properties of Pb1−xLa2x/3(Nb0.95Ti0.0625)2 O6 Ceramics

Enhanced Ferroelectric Phase Stability and High Temperature Piezoelectricity in PN Ceramics via Multisite Co‐Doping

Excellent temperature stability of piezoelectric properties in PbNb2O6‐based ceramics up to 450°C

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Effects of La₂O₃on the microstructure and piezoelectric properties of PbNb₂O₆

Effects of La on Dielectric and Piezoelectric Properties of Pb_1−xLa_2x/3(Nb_0.95Ti_0.0625)₂ O₆ Ceramics

Effects of La on Dielectric and Piezoelectric Properties of Pb_1−xLa_2x/3(Nb_0.95Ti_0.0625)₂ O₆ Ceramics

Excellent temperature stability of piezoelectric properties in PbNb₂O₆‐based ceramics up to 450°C