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Surface Modification of the Spontaneous Polarization in Ferroelectric Thin Films

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Chinese Physics Letters 1995年第9期12卷 565-568页

作者： QU Baodong ZHONG Weilie zhang peilin Department of Physics Shandong UniversityJinan 250100

The surface effects on the spontaneous polarization in ferroelectric thin films were discussed based on the Ising model in a transverse *** the modifications of the transverse field and the strength of coupling in the surface layer were taken into *** the temperature much lower than the Curie point,the behaviour of the spontaneous polarization deviates from the phenomenological *** surface effects might lead to the spontaneous polarization and the Curie temperature changing in different *** theory gives a reasonable description of the experimental temperature dependence of the spontaneous polarization of triglycine sulfate thin films in the literature.

关键词： field. transverse Polarization

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超声波-微波联合谷物干燥特性研究

农机化研究 2025年第4期47卷 141-150页

作者：李彬张沛琳何齐宇朱岩松冯绍鹏武汉轻工大学机械工程学院武汉430023

以微波干燥谷物为基础,开展了在谷物微波干燥前使用超声波预处理强化干燥效果的实验。分别从超声强度、预处理时间和不同装载质量方面进行研究,并进行SPSS相关性分析研究。实验表明:将超声波功率提高到90%,与未经超声预处理的谷物相比,... 详细信息

以微波干燥谷物为基础,开展了在谷物微波干燥前使用超声波预处理强化干燥效果的实验。分别从超声强度、预处理时间和不同装载质量方面进行研究,并进行SPSS相关性分析研究。实验表明:将超声波功率提高到90%,与未经超声预处理的谷物相比,到达安全水分含量所需时间减少约27%,而10 min的预处理时间在经济性和能耗方面更合理,且超声波预处理对微波干燥效率的提高不会因更高的装载质量而明显减弱。SPSS相关性分析研究表明:有/无超声波预处理的谷物含水率变化存在显著差异,不同预处理时间之间的含水率变化也存在显著差异,但更高装载质量之间的谷物含水量变化不存在显著性差异。通过对谷物干燥模型拟合发现:Henderson and Pebis模型拟合度较高(R2>0.97),可以有效描述超声波预处理下谷物微波干燥过程中水分随时间变化的规律。

关键词：微波干燥超声预处理干燥特性相关性分析谷物

Size and Temperature Dependence of Dielectric Constant of Ultrafine PbTiO_(3) Particles

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Chinese Physics Letters 1994年第8期11卷 514-517页

作者： QU Baodong JIANG Bin WANG Yuguo zhang peilin ZHONG Weilie Department of Physics Shandong UniversityJinan 250100

Using sol-gel method,we prepared ferroelectric PbTiO_(3) fine particles with particle size covering the range 20-200nm;the dielectric properties of powder compact were studied in the present *** room temperature dielectric constant increases with the decrease in particle size and reaches a maximum value at the size of about *** temperature dependence of dielectric constant involving the evolution of particle size during the measurement is discussed.

关键词： dielectric size particle

Flux Growth and Properties of KNPBN Crystal

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Chinese Physics Letters 1995年第1期12卷 27-29页

作者： WANG Shuxin SONG Yongyuan CHEN Huanchu zhang peilin ZHONG weilie Architectural Division Shandong UniversityJinan 250100 Institute of Crystal Materials Shandong UniversityJinan 250100 Department of Physics Shandong UniversityJinan 250100

Potasium sodium lead barium niobate KNPBN crystals have been grown successfully by flux *** dielectric constant along the polar axis was measured at 50 kHz as a function of temperature in the range of 0 to 400℃.The f... 详细信息

关键词： method. barium dielectric

STUDIES ON PHOTOREFRACTIVE CRYSTAL LEAD BARIUM NIOBATE

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Chinese Physics Letters 1990年第9期7卷 414-417页

作者： SONG Yongyuan JIANG Quanzhong SUN Daliang CHEN Huanchu zhang peilin ZHONG Weilie Institute of Crystal Materials Shandong UniversityJinan 250100 Department of Physics Shandong UniversityJinan 250100

The optical quality Pb^(1-x)Ba_(x)Nb_(2)O_(6) single crystals have been grown by Czochraski method from the *** structure,dielectric,ferroelectric properties were *** spectra,two-wave maxing properties were *** crysta... 详细信息

关键词： ferroelectric dielectric crystal

Barium Titanate Prepared by Stearic Acid-Gel Method

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Chinese Physics Letters 1994年第5期11卷 310-313页

作者： REN Tianling zhang peilin WANG Yuguo ZHONG Weilie WANG Xiaohui XU Baokun Department of Physics Shandong UniversityJinan 250100 Department of Chemistry JiJin UniversityChangchun 130023

Stearic acid-gel method was used to prepare barium *** the samples show a cubic perovskite structure and thus no ferroelectricity is detected at room temperature.X-ray diffraction reveals that the grains can hardly grow even firing at high temperature so that the grain size in most of the samples is below the ferroelectric critical size.A tentative explanation is proposed of the peculiarities based on the nonstoichiometry at the surface layer.

关键词： temperature grain ferroelectric

Highly efficient conversion of mouse fibroblasts into functional hepatic cells under chemical induction

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Journal of Molecular Cell Biology 2023年第11期15卷 43-57页

作者： Zhi Zhong Jiangchuan Du Xiangjie Zhu Lingting Guan Yanyu Hu peilin zhang Hongyang Wang Fudan University Shanghai Cancer Center Department of OncologyShanghai Medical CollegeFudan UniversityShanghai 200032China National Center for Liver Cancer Naval Medical UniversityShanghai 201805China Institute of Metabolism and Integrative Biology Fudan UniversityShanghai 200438China

Previous studies have shown that hepatocyte-like cells can be generated from fibroblasts using either lineage-specific transcription factors or chemical induction ***,these methods have their own deficiencies that restrict the therapeutic applications of such induced *** this study,we present a transgene-free,highly efficient chemical-induced direct reprogramming approach to generate hepatocyte-like cells from mouse embryonic fibroblasts(MEFs).Using a small molecule cocktail(SMC)as an inducer,MEFs can be directly reprogrammed into hepatocyte-like cells,bypassing the intermediate stages of pluripotent and immature *** chemical-induced hepatocyte-like cells(ciHeps)closely resemble mature primary hepatocytes in terms of morphology,biological behavior,gene expression patterns,marker expression levels,and hepatic ***,transplanted ciHeps can integrate into the liver,promote liver regeneration,and improve survival rates in mice with acute liver *** can also ameliorate liver fibrosis caused by chronic injuries and enhance liver ***,ciHeps exhibit no tumorigenic potential either in vitro or in ***,SMC-induced mesenchymal-to-epithelial transition and suppression of SNAI1 contribute to the fate conversion of fibroblasts into *** results indicate that this transgene-free,chemical-induced direct reprogramming technique has the potential to serve as a valuable means of producing alternative hepatocytes for both research and therapeutic ***,this method also sheds light on the direct reprogramming of other cell types under chemical induction.

关键词： direct cell reprogramming chemicals fibroblasts hepatocyte-like cells high efficiency regenerative medicine

Sduties on Modification of Pb_(1-x)BaxNb_(2)O_(6) Crystals

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Chinese Physics Letters 1993年第1期10卷 29-32页

作者： SONG Yongyuan CHEN Huanchu zhang peilin ZHONG Weilie Institute of Crystal Materials Shandong UniversityJinan 250100 Department of Physics Shandong UniversityJinan 250100

This paper reports the growth of pqre and Na,K modified lead barium niobate crystals and the measurement of their dielectric and structure *** results show that both pure and Na,K modified lead barium niobate crystals have growth *** the crystals belong to 4mm point group of tetragonal system at room *** Curie temperature are 379℃,389℃ and 473℃,respectively.

关键词： temperature. properties. barium

Heteroatom dopant strategy triggered high-potential plateau to non-graphitized carbon with highly disordered microstructure for high-performance sodium ion storage

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Journal of Energy Chemistry 2023年第4期79卷 192-200页

作者： peilin zhang Chen Huang Mingzhen Xiu Siyu Zhu Weiwei Wang Bo Zhu Likang Qin Yizhong Huang Luyang Chen Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Energy Research Institute Interdisciplinary Graduate ProgrammeNanyang Technological UniversitySingapore

Non-graphitized carbon(NGC)has been extensively utilized as carbonaceous anode in sodium-ion batteries(SIBs).However,more optimization to achieve competitive capacity and stability is still challenging for *** the study,the dopant strategy is utilized to construct nitrogen/sulfur-doped non-graphitized carbon(N-NGC or S-NGC)shell decorated on three-dimensional graphene foam(GF)as a self-support *** highly disordered microstructures of heteroatom doped carbons are produced by applying a low-temperature pyrolysis treatment to precursors containing nitrogen and *** DFT calculations of Na-ion adsorption energies at diverse heteroatom sites show marginal-S,pyrrolic N and pyridinic N with more intensive Na-ion adsorption ability than middle-S,C=O and pristine *** N-NGC with dominant small graphitic regions delivers adsorption ability to Na-ion,while the S-NGC with significant single carbon lattice stripes demonstrates redox reaction with ***,in comparison with only adsorption-driven slope regions at high potential for N-NGC,the redox reaction-generated potentialplateau enables non-graphitized S-NGC superior discharge/charge capacity and cycle-stability in the slope *** work could provide deep insight into the rational design of non-graphitized carbon with rich microstructure and composition.

关键词： Non-graphitized carbon Highly disordered microstructure Heteroatom dopant Adsorption Redox reaction