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Superior Energy Storage Density and Giant Negative Electrocaloric Effects in (Pb 0.98La 0.02)(Zr, Sn)O 3 Antiferroelectric Ceramics (Pb 0.98La 0.02)(Zr, Sn) o3反铁电陶瓷的优越储能密度和巨大负热效应
ChemRN: Ceramics (Topic) Pub Date : 2021-01-13 DOI: 10.2139/ssrn.3765776
Pengfei Zhao, Shibin Wang, Hui Tang, Xiaodong Jian, Xiaobo Zhao, Yingbang Yao, T. Tao, B. Liang, Shengguo Lu
{"title":"Superior Energy Storage Density and Giant Negative Electrocaloric Effects in (Pb 0.98La 0.02)(Zr, Sn)O 3 Antiferroelectric Ceramics","authors":"Pengfei Zhao, Shibin Wang, Hui Tang, Xiaodong Jian, Xiaobo Zhao, Yingbang Yao, T. Tao, B. Liang, Shengguo Lu","doi":"10.2139/ssrn.3765776","DOIUrl":"https://doi.org/10.2139/ssrn.3765776","url":null,"abstract":"Antiferroelectric materials are demanded in energy storage and solid-state cooling devices due to their distinct hysteresis loops and phase transition behaviors. In this work, (Pb0.98La0.02)(ZrxSn1-x)0.995O3 (PLZSx) antiferroelectric bulk ceramics with x=0.45-0.60 were prepared via the conventional solid-state reaction approach. The recoverable energy storage density of 4.8 J cm-3 and energy storage efficiency of 82.5% were procured in PLZS0.6 ceramics. In addition, the hysteresis loops were measured over a broad range of temperature/electric field and the electrocaloric effects were calculated using the Maxwell relation. The linear parts occurred in the polarization – electric field (P-E) hysteresis loop were fitted, and a power function of Em with m>2 for antiferroelectrics, while m<2 for normal ferroelectrics and relaxor ferroelectrics were procured. A giant negative electrocaloric effect (ΔT=-10.2 K) was also obtained at an operating temperature of 383 K and 20 MV m-1.","PeriodicalId":177035,"journal":{"name":"ChemRN: Ceramics (Topic)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125260443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Evaluating a Critical Resolved Shear Stress Criterion for Domain Nucleation in Ferroelastic Ceramics 铁弹性陶瓷畴形核的临界分解剪切应力准则的评价
ChemRN: Ceramics (Topic) Pub Date : 2020-06-03 DOI: 10.2139/ssrn.3606818
Charles S. Smith, Q. Rizzardi, R. Maaß, J. Krogstad
{"title":"Evaluating a Critical Resolved Shear Stress Criterion for Domain Nucleation in Ferroelastic Ceramics","authors":"Charles S. Smith, Q. Rizzardi, R. Maaß, J. Krogstad","doi":"10.2139/ssrn.3606818","DOIUrl":"https://doi.org/10.2139/ssrn.3606818","url":null,"abstract":"The mechanical behavior of single crystal, ferroelastic, tetragonal, ceria-titania-stabilized zirconia is evaluated through uniaxial micro-scale compression experiments. The deformed single crystal micropillars exhibit characteristics of several deformation modes, including twinning (ferroelastic domain nucleation), dislocation plasticity, and microcracking. Following earlier work that revealed how the onset of twinning obeys a critical resolved shear-stress law, much akin to Schmid's law, we test this model and show that it does not hold for the data presented herein. We ascribe this discrepancy to the fact that multiple deformation mechanisms can be active in different micropillars and even in the same micropillars at room temperature, which is revealed by transmission electron microscopy. Whilst little is known about the potential interactions between these mechanisms at such low homologuous temperatures, their coexistence implies that crystal orientation alone is not sufficient to predict ferroelastic domain nucleation behavior in small-scale single crystals.","PeriodicalId":177035,"journal":{"name":"ChemRN: Ceramics (Topic)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127590044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Characterization of Nano-LaFeO3 Powders by a Softchemistry Method and Corresponding Ceramics 软化学法制备纳米lafeo3粉体及其陶瓷表征
ChemRN: Ceramics (Topic) Pub Date : 2013-02-04 DOI: 10.2139/ssrn.3206747
R. Köferstein
{"title":"Synthesis and Characterization of Nano-LaFeO3 Powders by a Softchemistry Method and Corresponding Ceramics","authors":"R. Köferstein","doi":"10.2139/ssrn.3206747","DOIUrl":"https://doi.org/10.2139/ssrn.3206747","url":null,"abstract":"The preparation of a nano-sized LaFeO3 powder by a soft-chemistry method usingstarch as complexing agent is described herein. Phase evolution and development of thespecific surface area during the decomposition process of (LaFe)-gels were monitored up to1000 °C. A phase-pure nano-sized LaFeO3 powder with a high specific surface area of 25.7m2/g and a crystallite size of 37 nm was obtained after calcining at 570 °C. TEMinvestigations reveal a porous powder with particles in the range of 20 to 60 nm. Calcinationsto 1000 °C result in crystallite sizes up to 166 nm. Dilatometric measurements of the sinteringbehaviour show that the beginning of shrinkage of pellets from the nano-sized powder is downshifted by more than 300 °C compared to coarse-grained mixed-oxide powder. The orthorhombic - rhombohedral phase transition was observed at 980 °C in DTAmeasurements for coarse-grained ceramic bodies. The enthalpy change (dH) during the phasetransition and the thermal expansion coefficient (adil) for ceramics was determined as 410 J/mol and 11.8×10-6 K-1, respectively. Whereas the enthalpy changes during the phase transition of the nano-sized LaFeO3 powders are £ 200 J/mol.","PeriodicalId":177035,"journal":{"name":"ChemRN: Ceramics (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132896390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Near-Zero Doped-Niobate Ceramics for Dielectric Resonator Applications 近零掺杂铌酸盐陶瓷在介电谐振器中的应用
ChemRN: Ceramics (Topic) Pub Date : 2002-05-01 DOI: 10.1002/9781118380802.CH26
R. Pullar, A. Axelsson, N. Alford
{"title":"Near-Zero Doped-Niobate Ceramics for Dielectric Resonator Applications","authors":"R. Pullar, A. Axelsson, N. Alford","doi":"10.1002/9781118380802.CH26","DOIUrl":"https://doi.org/10.1002/9781118380802.CH26","url":null,"abstract":"Of the niobate ceramics with the formula MNbO, several compounds (M = Zn, Mg, Ca and Co) are examined. values (at 1-10 GHz) are between 40 000 and 90 000 GHz, offering potential in dielectric resonator applications. However, their temperature coefficient of resonant frequency () values were too high for commercial development, at between −50 to −90 ppm. This paper details the doping of these materials with dielectric ceramics with a large positive , in an attempt to reduce the overall to zero, whilst maintaining a high quality factor (). Several materials have been made with near-zero , particularly 90% CoNbO / 10% CaTiO, which had = +2 ppm, = 21 700 GHz and = 25.","PeriodicalId":177035,"journal":{"name":"ChemRN: Ceramics (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130409225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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