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| 1 | Significantly enhanced piezoelectric performance in Bi_(4)Ti_(3)O_(12)-based high-temperature piezoceramics via oxygen vacancy defects tailoring显示文摘Bismuth titanate (Bi_(4)Ti_(3)O_(12),BIT)piezoelectric materials have attracted increasing attention due to their high-temperature applications.However,it is quite challenging to simultaneously achieve outstanding piezoelectric properties and high Curie temperature in BIT-based systems.In this study,oxygen vacancy defects tailoring strategy was utilized to solve this problem,excellent piezoelectric coefficient(32.1 pC/N),and ultrahigh Curie temperature(659℃)are gotten in Bi_(4)Ti_(3)-x(Mn_(1/3)Nb_(2/3))xO_(12)(BTMN)ceramics,which are among the top values in the BIT-based ceramics.More importantly,the(Mn_(1/3)Nb_(2/3))(4+d)+complex-ion modified Bi_(4)Ti_(3)O_(12)-based ceramics are characterized with excellent piezoelectric stability up to 500℃(d33>30.0 pC/N at 500℃))and significantly reduced conductivity(only~10^(-7)U-1 cm^(-1)at 500℃).Moreover,enhanced ferroelectricity and good dielectric stability were also obtained.The better comprehensive properties can be ascribed to two aspects.First,the concentration of oxygen vacancy defects is obviously reduced,and their distribution is effectively controlled in BITMN ceramics.Second,the introduction of(Mn_(1/3)Nb_(2/3))^((4+δ)+)complex-ion gives rise to the antiphase boundaries and massive ferroelectric domain walls.This works not only reveal the high potential of BITMN ceramics for high-temperature piezoelectric applications but also deepen the understanding of the structure-properties relationship in BIT-based materials. | Xinchun Xie Zhiyong Zhou Ruihong Liang Xianlin Dong | 2021 | Journal of Materiomics2021，7，1： | 6 |
| 2 | Tune the electronic structure of MoS_(2)homojunction for broadband photodetection显示文摘Due to the weak absorption and low light-matter interaction of MoS_(2),intrinsic MoS_(2)photodetector usually has low photoresponse,thus limiting its real application.Herein,MoS_(2)homojunction was constructed by using the chemical vapor deposition grown intrinsic MoS_(2)films and the Nb-doped MoS_(2)films.The results show that the Nb doping will induce p-type doping in MoS_(2),where the electron concentration will decrease by 2.08×10^(12)cm^(–2)after Nb doping.By investigating the photoelectric effect of MoS_(2)/Nb-doped MoS_(2)homojunction-based phototransistor,the tunability of the photoresponse,detectivity as the function of the external field,wavelength,and power of light have been studied in detail.The results show that the photoresponse and detectivity are strongly dependent on the gate voltage due to the external field tuned interlayer photoexcitation attributing to the band bending.The maximum of photoresponse can reach 51.4 A/W,the detectivity can reach 3.0×10^(12)Jones,which is two orders higher than that of intrinsic MoS_(2).Furthermore,by correlating the photoresponse and detectivity with the external field,it is found that the photodetection of MoS_(2)homojunction can be significantly tuned and exhibit well photodetection in infrared.This comprehensive work not only sheds light on the tunable photoexcitation mechanism but also offers a strategy to achieve a high-performance photodetector. | Rui Tao Xianlin Qu Zegao Wang Fang Li Lei Yang Jiheng Li Dan Wang Kun Zheng Mingdong Dong | 2022 | Journal of Materials Science & Technology2022，，24： | 1 |
| 3 | Thermal Stability of (1 -x)BiScO3--xPbTiO3 Piezoelectric Ceramics for High -Temperature Sensor Applications显示文摘 | CHEN Si DONG Xianlin | 2006 | J Am Ceram Soc2006，89，10： | 1 |
| 4 | Effect of La2O3 doping on the tunable and dielectric properties of BST/MgO composite for microwave tunable application 显示文摘 | Liang Ruihong Dong Xianlin Chen Ying Cao Fei Wang Yongling | 2006 | Materials Chemistry and Physics2006，95，： | 1 |
| 5 | Thermal de- poling of high Curie point Aurivillius phase ferroelectrie ceramics 显示文摘 | YAN Haixue ZHANG Hongtao DONG Xianlin | 2005 | Appl Phys Lett2005，87，8： | 1 |
| 6 | Effect of rare-earth doping on the dielectric property and polarization behavior of antiferroelectric sodium niobate-based ceramics显示文摘The lead-free 0.96NaNbO_(3)-0.04CaSnO_(3) ceramics with rare-earth dopants(La,Sm and Lu)(NCLn100x)were prepared and characterized.It is found that a certain amount of La substitution stabilizes the antiferroelectric(AFE)phase but alleviates the lattice distortion in the fresh samples.Re-entrant-like characteristics are observed in the temperature e dielectric constant curves with the room temperature P phase gradually replaced by a possible R phase.Relaxor-like hysteresis loops with suppressed hysteresis loss and remanent polarization were obtained at high La content,achieving a relatively high Wre of 2.1 J/cm^(3) at a low electric field(250 kV/cm).The relaxation behaviors of the ferroelectric(FE)domain measured by piezoresponse force microscopy suggest an even long characteristic relaxation time of field-induced FE phase,which is different from the situations of other AFE perovskites.Via an explanatory defected diatomic chain model,we propose that a much larger mass of substitutive ion than the origin one helps to induce low-frequency localized mode,which is believed to be in favor of the formation of polar nano-regions and hence strengthens the dynamic stability of FE phase during electric field loading.Our research provides a further understanding of the tuning strategy for enhancing the antiferroelectricity of the NaNbO_(3)-based system. | Jiaming Ye Genshui Wang Xuefeng Chen Xianlin Dong | 2021 | Journal of Materiomics2021，7，2： | 1 |
| 7 | Processing and piezoelectric properties of porous PZT ceramics显示文摘 | Zeng Tao Dong Xianlin | 2007 | Ceram Int2007，33，3： | 1 |
| 8 | Effect of LiF addition on sintering behavior and dielectric breakdown mechanism of MgO-based microwave dielectric ceramics显示文摘Glass-free MgO-based microwave dielectric ceramics(1-x)wt%(0.98 MgO-0.02 Al2O3)-x wt%LiF(x=0.5,1,2,3,4)were synthesized where LiF and Al2O3 were utilized as sintering additive and reinforcement phase in MgO matrix respectively.It was found that ion substitution is apt to occur between LiF and MgO,leading to the formation of oxygen vacancies and MgF2.Nevertheless,different from ordinary liquidphase sintering,morphologies of ceramics were distinctly altered with grains changing from polyhedron to sphere-like shape and densities underwent obvious decrease when excessive amount of LiF was introduced and we call it excessive liquid-phase sintering.Grain boundary weakening caused by this circumstance would exert an adverse effect on physical properties.Moreover,LiF addition dramatically reduced dielectric breakdown strength and altered the dielectric breakdown behavior of MgO-based ceramics,which is dominated by electrical breakdown mechanism.Combination of good properties were achieved in 1 wt%LiF modified MgO-based ceramics sintered at 950℃ which exhibited superior microwave properties(εr=9.56,tanδ=9.2×10^(-5),Qf=124,600 GHz),high flexural strength(184.5 MPa),high thermal conductivity(21.3 W/(m,K)),high coefficient of thermal expansion(-12 ppm/℃)and moderate electrical properties(Eb=35.9 kV/mm,r=4.9×10^(12) U cm). | Chi Zhang Ying Chen Xin Li Haishen Ren Genshui Wang Xianlin Dong | 2021 | Journal of Materiomics2021，7，3： | 1 |
| 9 | High-performance and high-thermally stable PSN-PZT piezoelectric ceramics achieved by high-temperature poling显示文摘High piezoelectric properties and superior thermal stability are both important indicators of piezoelectric ceramics serving at high temperature.However,since these properties are usually mutually exclusive,high performance and superior thermal stability are hard to achieve simultaneously.Here we report that a high piezoelectricity(d_(33)∼562 pC/N)and superior thermal stability(the variation is within 7%from 20 to 330℃)were both achieved in 0.4 mol%ZnO-doped 0.02Pb(Sb_(1/2)Nb_(1/2))-0.51PbZrO_(3)-0.47PbTiO_(3) by high-temperature poling.Compared with traditional poling method,high-temperature poling method forms a small-sized and highly oriented domain structure,which can effectively improve the piezoelectric and dielectric properties of piezoelectric ceramics.At the same time,the enhanced pinning effect of defect ions and stabilized domain structure due to high-temperature poling also contribute to the superior temperature stability of the piezoelectric and dielectric properties.This work provides an effective method for designing piezoelectric materials with high performance and good temperature stability for high temperature sensor applications. | Zhengran Chen Ruihong Liang Chi Zhang Zhiyong Zhou Yuchen Li Zhenming Liu Xianlin Dong | 2022 | Journal of Materials Science & Technology2022，，21： | 1 |
| 10 | Effect of La2O3 doping on the tunable and dielectric properties of BST/MgO composite for microwave tunable application显示文摘 | Liang Ruihong Dong Xianlin Chen Ying | 2006 | Materials Chemistry and Physics2006，95，： | 1 |
| 11 | Mechanical and electrical properties of small amount of oxides rein- forced PZT ceramics显示文摘 | Xiang Pinghua Dong Xianlin Chen Heng | 2003 | Ceramic International2003，29，： | 1 |
| 12 | 显示文摘 | Liang Ruihong Dong Xianlin Chen Ying | 2006 | Materials Chemistry and Physics2006，95，： | 1 |
| 13 | 显示文摘 | Chen Ying Dong Xianlin Liang Ruihong | 2005 | J Appl Phys2005，98，06： | 1 |
| 14 | Preparation and electric properties of bismuth layer-structured ceramics Bi3NbTiO9 solid solution显示文摘 | ZHANG ZHEN YAN HAIXUE DONG XIANLIN | 2003 | Materials Research Bulletin2003，38，2： | 1 |
| 15 | Enhancement of mechanieal and dielectric breakdown properties by diffusion of SiC into lead zirconate titanate ceramics 显示文摘 | ZENG Tao DONG Xianlin YANG Hong | 2006 | Ser Mater2006，55，10： | 1 |
| 16 | Investigation on Phase Transition of Ferroelectric Ceramics of Lead Titanate─Zirconate Doped with Niobium and Tin─Substituted Lead Titanate─Zirconate by DTA,DSC and PRD显示文摘InvestigationonPhaseTransitionofFerroelectricCeramicsofLeadTitanate─ZirconateDopedwithNiobiumandTin─SubstitutedLeadTitanate─Z... | Lu Changwei Xi Tonggeng Yang Xuehua Chen Yunxian Xu Yibin Dong Xianlin Duan Lian(Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050) | 1996 | 化学世界1996，37，S1： | 0 |
| 17 | Grain size effect on piezoelectric properties of Sr_(2)Nb_(2)O_(7)ceramics显示文摘Grain size effect on piezoelectric properties and thermal stability of perovskite layer structured(PLS)Sr_(2)Nb_(2)O_(7) ceramics are investigated.The Sr2Nb2O7 ceramics with different average grain sizes from 1.2μm to 3.6μm were prepared in different sintering temperatures by solid state reaction method.The average grain size increases,accompanied by a higher relative density of up to 96%.Pure Sr_(2)Nb_(2)O_(7) ceramics with larger grain size show a remarkable d33 of(1:70:1)pC/N while still with a very high T_(c) of(1340±4)℃.The thermal depolarization temperature of samples with large grain sizes reach over 1200℃ and the thermal stability increased with increasing of grain size.The ferroelectric domains structure was observed by PFM and larger grain is easy to form ferroelectric domain then enhance piezoelectric properties.This study demonstrates enhanced piezoelectric properties can be achieved in pure Sr_(2)Nb_(2)O_(7) by solid state reaction method and bring great revitalization to the Sr_(2)Nb_(2)O_(7)-based ceramics as a promising high-temperature piezoelectric material. | Tao Chen Zhiyong Zhou Ruihong Liang Xianlin Dong | 2018 | Journal of Advanced Dielectrics2018，8，4： | 0 |
| 18 | Excellent piezoelectric constant and thermal stability in BiScO_(3)-PbTiO_(3) piezoelectric ceramics via domain engineering显示文摘The application of piezoelectric ceramics at high temperature is limited because they can't have both high piezoelectric coefficient and high Curie temperature.While,BiScO_(3)-PbTiO_(3)-based piezoelectric ceramics possessing high Curie temperature and piezoelectric properties simultaneously have drawn increasing attention due to their potential applications at high temperature.Here,we reported a novel compositional design of(1-x)[0.36BiScO_(3)-0.64PbTiO_(3)]-xBi(Sn_(1/3)Nb_(2/3))O_(3)(abbreviated as BS-PT-xBSN).BS-PT-xBSN ceramic samples were synthesized by conventional solid state reaction method.According to the ternary phase diagram of BS-PT-xBSN ceramics brought up in this work,the morphotropic phase boundaries(MPB)were confirmed,which is located in the vicinity of x¼0.02.It canbe identified that the x=0.02 sample near MPB has the optimal electric performance which are giant piezoelectric coefficient(d_(33)-450 pC/N,higher 18%than undoped samples)and high Curie temperature(T_(c)-368℃)as well as large remant polarization(P_(r)46.6 m C/cm^(2)).In addition,the variation of P_(r) is 3% in the temperature range of 30-180℃ and the depolarization temperature of x=0.02 ceramics is about 280℃.Structural analysis such as in-situ PFM and TEM confirms that giant piezoelectricity and depolarization temperature are attributed to the appearance of nano-domain and complexity of domains as well as the stable domain configuration.This work not only reveal the high potential of BS-PT-xBSN for high-temperature piezo-electric applications but also open up a feasible approach to design new high-temperature piezoelectric ceramics. | Yazhu Dong Zhiyong Zhou Ruihong Liang Xianlin Dong | 2022 | Journal of Materiomics2022，8，2： | 0 |
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