ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Liang Cao,Jiajia Wang,Feifan Hu,Huihui Liu,Jian Guo,Haoran Yu,Mingyuan Yan,Ji Zhang,Feifei Wang,Yiping Wang,Shan-Tao Zhang
In this work, based on the lanthanide rare earth Sm3+ doped 0.2Pb(Mg1/3Nb2/3)O3-(0.8-x)PbZrO3-xPbTiO3:0.015Sm ceramics with a rhombohedral-tetragonal morphotropic phase boundary (MPB) around x = 0.40, we gradually introduced alkaline earth Ba2+ and Sr2+ at the A-site to substitute Pb2+, namely, 0.2A(Mg1/3Nb2/3)O3-0.4AZrO3-0.4ATiO3:0.015Sm (A = Pb0.99-yBa0.01Sry) and conducted a systematic study on their phase structure, domain configuration, and electrical properties. The results indicate that without alkaline earth substituting, the MPB composition shows peak electrical property with piezoelectric coefficient d33 = 477 pC/N and electromechanical coupling factor kp = 0.59, while an appropriate amount of alkaline earth substituting changes the MPB from rhombohedral–tetragonal coexisting phases to rhombohedral–monoclinic–tetragonal coexisting phases, leading to a significant enhancement in electrical properties with d33 = 687 pC/N and kp = 0.63 around y = 0.03 for comparison. This work classifies the mechanism for alkaline earth substituting enhanced piezoelectric performance and may provide a guide for the development of high-performance lead-based relaxor ferroelectrics.
研究领域:
材料科学
·
陶瓷材料
·
铁电材料
·
固态物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Yitong Ding,Mingjiao Li,Wenjing Dong,Ze Kan,Zhibo Li
Chemically synthesized poly(4-hydroxybutyrate) (P4HB) serves as an alternative material for toughening poly(lactic acid) (PLA), but the two materials exhibit poor compatibility, and most compatibilizers fail to localize at the phase interface, resulting in inefficient toughening. In this study, a phase interface-located reactive compatibilizer, poly (glycidyl methacrylate) (PGMA), is synthesized to enhance the interfacial adhesion between PLA and P4HB, thereby improving their compatibility. The PGMA compatibilizer demonstrates a tendency to selectively disperse at the phase interface of PLA and P4HB supported by thermodynamic calculations. Compared to the PLA/P4HB blend, the PLA/P4HB/PGMA blend exhibits enhanced molecular chain entanglement and a blurrier phase interface. Consequently, the mechanical and shape memory behavior of the PLA/P4HB/PGMA blend are improved. For example, the elongation at break of the PLA/P4HB/PGMA blend increased from 20.8 % to 265.1 %, marking an increase of 12.7 times compared to the PLA/P4HB blend. Due to its small molecular weight, the T o n e s e t (onset degradation temperature) of PGMA is only 180.3 °C. Fortunately, the T o n e s e t of the PLA/P4HB/PGMA system exceeds 220 °C after the chain expansion reaction, indicating a significant improvement in thermal stability. Thus, the phase interface-located chain expansion reaction offers an effective approach to improving the compatibility of PLA/P4HB blends while maintaining their high thermal stability.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lei Zhang,Zhiyuan Jiang,Jingru Guo,Chao Zhang,Xiaolong Xu,Dong Shi,Yongliang Shao,Zizheng Ai,Yongzhong Wu,Xiaopeng Hao
An in-depth understanding of structure-activity relationship between the phase constitution and solar-to-hydrogen (STH) conversion efficiency is conducive to guiding the optimization route of targeted photocatalyst candidates, further establishing advanced photocatalytic systems. Herein, based on the concept of phase engineering, we encompassed the crystalline phase of CdS and achieved precise regulation of phase proportion as well as phase boundary width in the phase junction for the first time. The above cooperative effect not only modifies energy band distribution for sufficient redox potentials, but also guarantees the reverse migration orientation of photogenerated carriers in phase junction, thereby endowing photocarriers with a prolonged lifetime. Compared to pure cubic or hexagonal phase (72.6 or 101.1 μmol h −1 g −1 ), this CdS system with optimized phase junction demonstrates an improved photocatalytic hydrogen evolution activity of 1.04 mmol h −1 g −1 and favorable stability without cocatalyst assistance, which mainly stems from an efficient protons reduction process interacting with long-lived photogenerated electrons. This research explores the mechanism behind phase regulation and its relationship with junction capability, providing a powerful strategy to manipulate crystal phase distribution and paving a feasible avenue for other phase-dependent photocatalysts towards rational design of heterostructures based on different phases in solar energy conversion field.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 7
·9032-9043
·
IF 2.478
Liu Yunyi,Pan Yongqi,Bai Xudong,Wang Jinchuan,He Caiwang,Xu Zunping,Chen Yi
A conventional ceramic preparation method was used to fabricate the newly designed ternary (K,Na)NbO 3 -based lead-free ceramics, which have the general formula of (0.97- x )K 0.40 Na 0.60 Nb 0.95 Sb 0.05 O 3 –0.03Bi 0.5 K 0.5 HfO 3 – x SrZrO 3 . An X-ray diffraction analysis, together with dielectric-temperature measurements, was performed for determining their phase structures. The crystal structure was found to transition from a rhombohedral-orthogonal phase coexistence to a three-phase coexistence of rhombohedral-orthogonal-tetragonal phases with the increase in SrZrO 3 concentration, and then to a rhombohedral-tetragonal phase coexistence, and finally to a single rhombohedral phase. Near the three-phase coexistence zone, the ceramics exhibit an obviously enhanced electrical activity, with an electromechanical coupling coefficient k p = 0.364 and a piezoelectric constant d 33 = 280 pC/N. Through a microstructure analysis, a slightly excessive amount of SrZrO 3 was found to result in an inhibition for the grain growth of the studied ceramics. These results show that incorporating SrZrO 3 into ternary (K,Na)NbO 3 -based ceramics is still an effective means of constructing phase boundaries and improving the electromechanical properties.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Bowei Xun,Aizhen Song,Jingru Yu,Yang Yin,Jing-Feng Li,Bo-Ping Zhang
BiFeO3-BaTiO3 is a promising high-temperature piezoelectric ceramic that possesses both good electromechanical properties and a Curie temperature (TC). Here, the piezoelectric charge constants (d33) and strain coefficients (d*33) of (1 – x)BiFeO3-xBaTiO3 (BF-xBT; 0.20 ≤ x ≤ 0.50) lead-free piezoelectrics were investigated at room temperature. The results showed a maximum d33 of 225 pC/N in the BF-0.30BT ceramic and a maximum d*33 of 405 pm/V in the BF-0.35BT ceramic, with TCs of 503 and 415 °C, respectively. To better understand the performance enhancement mechanisms, a phase diagram was established using the results of XRD, piezoresponse force microscopy, TEM, and electrical property measurements. The superb d33 of the BF-0.30BT ceramic arose because of its location in the optimum point in the morphotropic phase boundary, low oxygen vacancy (VO··) concentration, and domain heterogeneity. The superior d*33 of the BF-0.35BT ceramic was attributed to a weak relaxor behavior between coexisting macrodomains and polar nanoregions. The presented strategy provides guidelines for designing high-temperature BF-BT ceramics for different applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
ACTA MATERIALIA
·
2022
·
IF 9.209
Shengdong Sun,Ye Liu,Yueyun Zhang,Lu Wang,Chuanrui Huo,Shiqing Deng,Hui Liu,Yang Ren,Jie Wu,He Qi,Jun Chen
Owing to the mutual restriction between piezoelectric coefficient ( d 33 ) and Curie temperature ( T c ), the discovery of high-temperature piezoceramics with large d 33 is highly desirable but challenging. Here, BiFeO 3 -BaTiO 3 -PbTiO 3 (BF-BT-PT) ternary system is redesigned by combining the low lattice distortion of BF-BT perovskites and rhombohedral-tetragonal coexistence of BF-PT phase boundary. As a result, excellent comprehensive piezoelectric properties with a large d 33 of ∼380 pC/N and a high T c of ∼483 °C are obtained in a tetragonal composition close to the triple point. Interestingly, even though a c / a ratio as large as 1.04 can be detected in the virgin sample, hierarchical domains that macrodomains composed of nanosized stripe domains can be found. The tetragonal phase could partly transform into a monoclinic phase under electric field according to in-situ high-energy synchrotron X-ray diffraction measurement , constructing a field-induced morphotropic phase boundary. The large lattice distortion and unstable phase structure simultaneously contribute to the high T c, and large d 33 for the studied BF-BT-PT ceramics, respectively, showing great potential for high-temperature sensors and transducers.
研究领域:
材料科学
·
物理学
✓ 已验证
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
·
2025
·
IF 5.6
Yan Mu,Junjun Wang,Bingsen Wang,Yufang Jiao,Jian He,Meng Liu,Che Sun,Shaoyang Yuan,Danqing Liu,Wenlong Yang,Fengmin Wu
Lead-free BNT-BT based ceramics exhibit significant potential for achieving high piezoelectric performance. However, it is an effective strategy to achieve a morphotropic phase boundary (MPB) region with good thermal stability remains challenging. Herein, the incorporation of K 0.5 Na 0.5 NbO 3 into the Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 binary system was explored, leading to a significant enhancement in both piezoelectric performance and thermal stability. The ternary BNT-BT-KNN ceramic system was systematically investigated with respect to its phase diagram, crystal structure, electrical properties, and relaxation behavior. It was observed that both the grain size and domain size gradually decrease as the KNN content increases. Remarkable electromechanical coupling factor ( k p = 0.217), exceptionally high piezoelectric properties ( d 33 = 105 pC/N), and improved ( T d = 164 °C) were achieved at BNT-BT-0.01KNN ceramics. The phase diagram of BNT-BT-KNN has been established, offering a comprehensive roadmap for the development of high-performance piezoelectric ceramics with enhanced piezoelectric responses. This work may facilitate potential applications in piezoelectric 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
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Weiwei Meng,Lei Dai,Wei Meng,Huizhu Zhou,Yuehua Li,Zhangxing He,Ling Wang
Mixed-potential type NH 3 sensors were fabricated using La 10 Si 5.5 Al 0.5 O 27 (LSAO) consisting of a porous layer and a dense layer as solid electrolyte and TiO 2 as the sensing electrode. The effect of a LSAO porous layer and TiO 2 phase transformation on sensor performances was investigated. The porous layer of LSAO electrolyte obviously enhanced sensor performance. Compared with the sensor without a LSAO porous layer, the sensor with LSAO porous layer exhibited larger responding potential values and higher sensitivity due to the enhanced three phase interface length. Anatase-TiO 2 (a-TiO 2 ) based sensor exhibited better sensing performance than rutile-TiO 2 (r-TiO 2 ) based sensor at the examined temperature range. A-TiO 2 transformation toward r-TiO 2 resulted in poor sensing performances of the sensor. The best sensing characteristics were achieved for the NH 3 sensor with a-TiO 2 sensing electrode calcined at 900 °C for 3 h. The potential values of the sensor response to NH 3 linearly depended on the logarithm of NH 3 concentrations at 450–600 °C and the sensitivity reached 169.7 mV/decade in the range of 50–400 ppm at 500 °C. At the same time, the sensor exhibited well anti-interference capability to H 2 , NO, CH 4 and CO 2 , but a little cross-sensitivity toward NO 2 was observed. High temperature treatment (>900 °C) caused a-TiO 2 transformation into r-TiO 2 and V 2 O 5 additions were conducive to TiO 2 phase transformation.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2016
·Vol. 119
·期 6
·
IF 2.101
Shi Xin Xin,Liu Xiao Qiang,Chen Xiang Ming
The evolution of structure, ferroelectric, and piezoelectric properties in Bi 1−x Sm x Fe 0.99 Ti 0.01 O 3 ceramics was extensively investigated within the entire morphotropic phase boundary region with 0 ≤ x ≤ 0.20. A sequential phase transition of R3c-Pna2 1 -Pbnm with increasing Sm content was revealed by Rietveld refinement of the X-ray diffraction data together with the macroscopic ferroelectric measurements. Both ferroelectric and piezoelectric properties showed a great enhancement in the vicinity of the R3c/Pna2 1 (polar-to-polar) phase boundary, which should be caused by the field-induced phase transition between these two phases. Such field-induced phase transition might be essentially accompanied by a change of magnetic state, which indicated a way of controlling magnetism by means of electric field.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2024
·
IF 4.2
Bo Zhao,Cun You,Shengya Zhang,Zeben Liu,Guiqian Sun,Zhuang Li,Xinglin Wang,Zhihui Li,Qiang Zhou,Yanli Chen,Qiang Tao,Pinwen Zhu
Harsh synthesized pressure is required in constructing of excellent grain boundary (GB) connection for nano-polycrystalline cubic boron nitride (nPcBN) to yield high hardness and toughness. Therefore, it is urgent to fabricate robust nPcBN composite under relatively mild pressure by developing the hard nonmetal binders to form coherent/semi-coherent phase boundary (cPB, scPB) with cBN. Here, the slight content of nano‑boron was composited with nPcBN to achieve superhard property of 45.2 GPa and high fracture toughness 8.4 MPa‧m 0.5 under a relatively mild condition of 5 GPa and 1800 °C. The hardness is comparable with single crystal cBN and the toughness is about three times higher than single crystal cBN. The nano boron connects the nano cBN grains by cPB and scPB, and nano boron filled the triangular space of cBN crystals, which eliminates the defects to prohibit the crack trigger sources and enhances the strength . This work provides a reference and a new strategy on composite engineering in superhard materials with high toughness by relatively mild synthesized pressure.
研究领域:
材料科学
·
力学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Shengdong Sun,Ye Liu,Yueyun Zhang,Lu Wang,Shiqing Deng,Yang Ren,He Qi,Hui Liu,Jun Chen
Improving piezoelectric performance is always favorable to further enhance the sensitivity and accuracy of piezoelectric devices. Here, a complex piezoelectric system of Pb(Ni 1/3 Nb 2/3 )O 3 -Pb(Yb 1/2 Nb 1/2 )O 3 -Pb(Hf 0.1 Ti 0.9 )O 3 is designed and investigated in detail. Optimized piezoelectric response of ∼ 880 pC/N is achieved at the composition of 0.51PNN-0.09PYN-0.40PHT. The characterization of TEM and In-situ high-energy synchrotron diffraction indicate that nanodomain growth and microdomain switching occurs in succession at around coercive electric field. Most interestingly, the coexisted tetragonal and rhombohedral-like phase transforms into multiple monoclinic-like phases with polarization vectors aligned as close to the electric field direction as possible under the strong electric field. The enhanced polarization instability in this complex morphotropic phase boundary sample should be ascribed to the strong local heterogeneity. The novel polarization rotation behavior found in this work would be important guidance for designing high-performance piezoceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）