CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Leilei Li,Jing Wang,Qilong Guo,Yongheng Yang,Zongmo Shi,Jie Xu,Wanzhi Cao,Feng Gao
Two-dimensional platelets of the perovskite-structured PbTiO 3 were synthesized from a layer-structured PbBi 4 Ti 4 O 15 precursor, using a topochemical microcrystal route. The PbBi 4 Ti 4 O 15 precursor showed a high aspect ratio with an average size of ∼7.74 μm and thickness of ∼0.29 nm. Later, PbTiO 3 platelets coexisting with Pb 4 Bi 4 Ti 7 O 24 mesophase were obtained, which had a more stable Aurivillius structure and was difficult to completely convert to the perovskite structure during topochemical microcrystal conversion. The reason that the Pb 4 Bi 4 Ti 7 O 24 mesophase coexisted in PbTiO 3 platelets was deeply discussed. Both the crystal structure difference between the unit cell parameters for (Pb 4 Bi 2 Ti 7 O 22 ) 2- and the thickness for the (Bi 2 O 2 ) 2+ layer, and the stability of (Bi 2 O 2 ) 2+ layer were used to analyze the existence of Pb 4 Bi 4 Ti 7 O 24 phase. However, the result showed that the stability of (Bi 2 O 2 ) 2+ layer was the dominant reason, because the [OBi 4 ]/[OPb 4 ] tetrahedron formed in the (Bi 2 O 2 ) 2+ layer due to the similar chemical properties of Pb 2+ and Bi 3+ . The work provided deep theoretical guidance to fabricate anisotropic perovskite platform-based topchemical microcrystal conversion mechanisms.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2020
·
IF 1.632
Shutong Yuan,Bo Li,Jin Wang
Morphology control is a challenging subject in preparing monocrystalline 1D perovskite structures due to high symmetry of their crystal structure. Herein, we employed K 2 Ti 6 O 13 as the precursor and demonstrated its effectiveness in synthesizing the PX-PbTiO 3 nanowires, which could be transformed into monocrystalline perovskite-type PbTiO 3 nanowires by facile heat treatment in air. We studied the impact of hydrothermal reaction parameters such as temperature, reaction duration and surfactant concentration on the phase and morphology of the products. It was shown that the employment of a proper concentration of PVA was necessary to the formation of high-quality PX-PT nanowires. Based on the results of control experiments, a possible mechanism for the formation of PX-PT nanowires was proposed.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Xinyu He,Tao Wang,Xudong Li,Sujit Das,Xingjun Liu,Zuhuang Chen
Piezoelectric ceramics with combined high piezoelectric performance and excellent thermal stability are important and urgently needed for actuation and sensor applications in harsh environments, such as aerospace, automotive, oil, and gas exploration industries. However, the development of such piezoceramics is still a highly challenging task because an enhanced piezoelectric response is generally accompanied by a decrease in thermal stability. Here, we report that 0.55Bi1–xSmxFeO3–0.45PbTiO3 piezoceramics exhibit a balanced trade-off between piezoelectric response and thermal stability near the morphotropic phase boundary (MPB), where piezoelectric coefficient d33 (275 pC N–1) barely changes even at a temperature as high as 320 °C and the well-squared shape P–E hysteresis loop persists even at a high temperature of 220 °C. Compared with La3+, Sm3+ has a smaller ionic radius than Bi3+ or Pb2+ and thus could be more effectively to induce MPB at a relatively low substitution level (x = 0.16–0.21). In turn, the thermal stability of the piezoceramics does not degrade significantly. Our results further demonstrate that Sm substitution induces a strong relaxor behavior in the ceramics. These results suggest that the Sm3+-doped BiFeO3-PbTiO3 ceramics hold great promise for high temperature piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Pengpeng Xu,Junyi Yu,Chaofan Li,Suibin Luo,Shanming Ke,Yangbo Zhou,Shuhui Yu,Rong Sun
Flexible polymer composites with high dielectric constants and low dielectric losses at high frequencies are highly desired in microwave and RF applications. However, a high dielectric constant is often obtained at the expense of flexibility because a high loading of filler is needed. In this work, we synthesize a core-shell structured 1D filler by coating high-dielectric-constant PbTiO 3 onto the surface of low-thermal-expansion-coefficient SiC nanofibers , which are then incorporated into the epoxy matrix together with BaTiO 3 nanoparticles to form the multi-phase BaTiO 3 /SiC@PbTiO 3 /epoxy composite film . A high dielectric constant (35 at 100 Hz and 20 at 5 GHz) and a low dielectric loss (0.023 at 100 Hz and 0.13 at 5 GHz) are achieved as the filling content of SiC@PbTiO 3 and BaTiO 3 is 5.24 wt% and 80 wt%, respectively. Prediction models of the effective dielectric constant of polymer-based composites reveal that a continuous polarization network is constructed in the composites owing to the physical contact between BaTiO 3 and PbTiO 3 . The construction of the multi-phase filler provides a feasible way to effectively adjust and improve the dielectric properties of polymer-based composite films.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Chen Yang,Xijun Xu,Wajid Ali,Yaojin Wang,Yiping Wang,Ying Yang,Lang Chen,Guoliang Yuan
Ultrasonic sensors are widely applied in industries near room temperature; however, their application at high temperature is still a challenge mainly due to the lack of high-performance piezoelectric ceramics. Here, the 0.364BiScO3–0.636PbTiO3–0.005CaTiO3 ceramic exhibits excellent piezoelectric performances at 20–440 °C. Its piezoelectric coefficient d33 increases from 475 pC/N at 20 °C to 853 pC/N at 360 °C, and then it gradually decreases to 669 pC/N at 440 °C. Furthermore, the planar electromechanical coupling factor kp gradually increases from 0.59 at 20 °C to 0.67 at 200 °C, and then it remains at a stable value of 0.65–0.67 at 150–350 °C. These achievements are because the ceramic morphotropic phase boundaries have a flat Gibbs free energy versus polarization curve and a wide temperature range. Since the piezoelectric ceramic shows satisfactory piezoelectric properties at 20–440 °C, the corresponding ultrasonic sensors can in situ monitor many high-temperature devices, such as engines, wheels, drills, boilers, etc.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Functional Materials Letters
·
2021
·
IF 2.17
Chol-Nam Ri,Jong-Su Ri,Kwang-Ho Ju
In this paper, the effect of Sb 2 O 3 doping on the sintering and polarization stability of PbTiO 3 ceramics was investigated. The Sb 2 O 3 -doped PbTiO 3 ceramic materials were prepared via a conventional piezoelectric ceramic processing. The results showed that the as-prepared PbTiO 3 ceramics exhibit a good sintering stability without cracking during sintering because of reducing spontaneous strain stemmed from decrease the tetragonal degree of PbTiO 3 by Sb 2 O 3 doping. Furthermore, the polarization stability of Sb 2 O 3 -doped PbTiO 3 ceramics was considerably enhanced by the relaxation of strain and stress concentration during poling stemmed from the formation of good microstructure with fine grain and high density, and by decreasing the loss stemmed from reduction of oxygen vacancy concentration due to the substitution of Sb 5 + ions for Ti 4 + ions under a polarization condition with temperature of 130–150 ∘ C and applied electric field of 4.5–5.5 kV/mm, and its yield of polarization is achieved ca. 80%.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yukai Chen,Yiyi Ji,Ruizhe Wang,Dan Wang,Jiaojiao Fang,Rulin Dong,Baoying Dai
Recombination of photoinduced electrons and holes inhibits the photocatalytic efficiency. To boost the separation of carriers, constructing heterojunction and built-in piezoelectric field are necessary. Herein, a novel BaTiO 3 /PbTiO 3 (BTO/PTO) S-scheme heterojunction with dual piezoelectric effect was proposed for the first time. The combination of PTO nanofibers and BTO nanoparticles creates more contact areas to enlarge the deformation and enhance the piezoelectric effect. The synergism between heterojunction and piezoelectric field greatly helps the separation of photoinduced carriers and enhances the catalytic performance. Benefited from the carrier separation, the 10%BTO/PTO composite exhibits a doubled efficiency than PTO. Furthermore, its photo-piezoelectric catalytic efficiency is 4.3 times that of photocatalysis and 2.8 times that of piezoelectric catalysis, proving the effectiveness of the synergism of piezoelectric effect and photocatalysis. This design provides a feasible avenue to modulate the behavior of carriers for efficient photocatalysis.
研究领域:
材料科学
·
纳米技术
·
催化
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Gang Jian,Yong Jiao,Qingzhen Meng,Fei Xue,Liang Feng,Ning Yang,Jianhua Jiang,Minfeng Lü
High temperature (HT) dielectrics have drawn increasing attentions due to strong potentials in capacitors working in extreme temperature conditions. The selection of high temperature ceramic fillers and polymers and the design of composite configurations are crucial for obtaining excellent dielectric and energy storage performances. In this study, PbTiO 3 nanofibers with a confined tetragonality with a lower c/a ratio are synthesized by the molten-salt method and polyimide (PI)/PbTiO 3 nanofiber composites are prepared via the in-situ polymerization. The composite (50 vol% filler loading) possesses greatly enhanced dielectric constant of 46 and low tanδ of ~0.02 at 1 kHz; ε r is 13.9 times larger than 3.3 for PI. From electric displacement-electric field loop investigations, superior energy storage performances of a large discharged energy-density of 16 J cm −3 under 300 MV m −1 and a large charge/discharge efficiency of 80 % are obtained. Furthermore, dielectric constant, energy density and efficiency of the composite exhibit a very good thermal stability from the room-temperature to over 200 °C. Overall, superior properties as well as good thermal stabilities of the PI/PbTiO 3 nanofiber composites indicate strong potentials in HT electrical energy storage capacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
MEASUREMENT
·
2023
·
IF 5.6
Yi Xin,Junye Tong,Tianyuan Hou,Hongyan Liu,Meng Cui,Xuefeng Song,Yuhang Wang,Tingting Lin,Lingling Wang,Gang Wang
BiScO 3 -PbTiO 3 (BS-PT) has the high Curie temperature and excellent piezoelectric activity, and has the potential to fabricate high-performance piezoelectric devices. However, the fabrication of one-dimensional BS-PT piezoelectric sensor remains a great challenge. Here, pure phase BS-PT nanofibers are proposed and experimentally demonstrated by optimizing the concentration of the electrospinning additive and the sintering temperature, and the interdigital electrodes are combined to assemble the sensor. The BS-PT nanofibers piezoelectric sensor can maintain a stable sensitivity above 4 V/N in the range of 10–40 Hz at 60–200 °C. In addition, it has a nearly linear output voltage as the excitation pressure increases ranging from 0.07 N to 0.55 N in the range of 160–260 °C, and the sensitivity at 220 °C is still higher than 5.4 V/N. These results highlight the BS-PT nanofibers piezoelectric sensor is promising to be used for high-temperature pressure and vibration measurements.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jinxin Wang,Guicheng Jiang,Weicheng Huang,Danqing Liu,Bin Yang,Wenwu Cao
PbTiO 3 (PTO) and Cu-doped PbTiO 3 thin films were deposited on the fluorine doped tin oxide (FTO) by a sol-gel route. Detailed investigations were made on the effects of Cu doping on the crystal structure and ferroelectric properties of the thin films. With increasing Cu amount, the crystal structure of Cu-doped films gradually transits from tetragonal to pseudo-cubic phase. Worth mentioning, the Cu-doped can induce a superior giant remnant polarization of ∼55.7 μC/cm 2 and a relatively low coercive field of 304 kV/cm when the molar concentration of Cu in the sol is 0.02. The experimental results show that Cu-doped PbTiO 3 is very a promising candidate for ferroelectric random access memory (FERAMs) applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Zibo Dong,Zhaoyang Wang,Tiantian Yang,Hange Feng,Lingwei Li,INAAM ULLAH,Shaolin Xue
s Among many photocatalysts , the low charge separation efficiency has been an essential reason limiting photocatalytic performance. The heterojunction is a well-established strategy, but the strength of the interfacial electric field constructed by different Fermi energy levels is very limited. In this paper, the simple hydrothermal method is used to selectively deposit growth of MoS 2 on the PbTiO 3 (00 1 ̅ ) surface thereby constructing S-scheme heterojunctions with interfacial electric fields enhanced by polarization properties and bound charges. The enhanced interfacial electric fields offer a strong motivation for the separation and migration of photogenerated carriers. In addition, the oxygen vacancies and photo deposited Pt on the PbTiO 3 (001) surface provide sufficient active sites for hydrogen production , while the petal-like MoS 2 on the PbTiO 3 (00 1 ̅ ) surface can effectively adsorb pollutants for degradation. In the presence of pollutants (TC) as sacrificial agents, the MoS 2 /PbTiO 3 composites with enhanced interfacial electric fields showed excellent photocatalytic hydrogen production performance with hydrogen productivity of 217.09 µmol g −1 h −1 , which is 4.56 times higher than that of pristine PbTiO 3 (47.61 µmol g −1 h −1 ). This study suggests that S-scheme heterojunctions enhanced by polarization properties and bound charges will show significant potential in improving charge separation efficiency.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS LETTERS
·
2023
·Vol. 122
·期 22
·
IF 4
Wang Mingwen,Yang Shuai,Wu Jie,Li Jinglei,Qiao Liao,Liu Xuechen,Wang Chao,Feng Xinya,Li Chunchun,Li Fei
High-temperature piezoelectric devices require piezoelectric ceramics with high Curie temperatures and high-temperature stability of piezoelectric properties to avoid the depolarization of piezoelectric ceramics during application. However, piezoelectric materials with high Curie temperatures usually have restrained piezoelectric properties. Crystallographic orientation via texture engineering is a practicable way to improve piezoelectric performance. Here, we propose a sintering-aid-assisted template grain growth strategy to texture BiScO 3 -PbTiO 3 ceramics to overcome the low orientation issue that challenges the texturing of BS-PT for decades. By judiciously selecting B 2 O 3 -CuO as sintering aids, we fabricated highly ⟨001⟩-textured 0.43BS-0.57PT ceramics with Logtering factors >99.0% that possess high piezoelectric coefficients d 33 of 474–612 pC/N while maintaining relatively high Curie temperatures of 370–402 °C. Importantly, this work addresses a long-standing issue presented in BS-PT ceramics, i.e., the low electromechanical coupling property of BS-PT ceramics ( k 33 < 0.70) by improving the electromechanical coupling factor k 33 to 81.2%. The newly designed textured BS-PT ceramics are thought to be promising candidates for the design of high-temperature piezoelectric transducers and actuators.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）