Structure and dielectric properties of (Sr1−1.5xBix)TiO3 thin films

Shi, Peng; Ren, Wei; Zhao, Min; Wei, Xiaoyong; Wu, Xiaoqing; Chen, Xiaofeng; Yao, Xi

doi:10.1063/1.3106162

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…Bi-doped strontium titanate (Sr 1−1.5x Bi x TiO 3 ) with perovskite structure is a very promising candidate for application in linear energy-storage capacitors. [19][20][21] The dielectric constant of Sr 0.85 Bi 0.1 TiO 3 ceramics at room temperature is approximately 800-1500 with a linear temperature coefficient, 22 whereas that of the crystalline Sr 0.85 Bi 0.1 TiO 3 thin film (width in the micrometer range) is in the range of 100-140, 19,23 which is one of the highest dielectric constant values for linear inorganic oxide films. However, the breakdown strength of crystalline Sr 0.85 Bi 0.1 TiO 3 films is lower than that of many other oxide ceramic films with lower dielectric constants.…”

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confidence: 99%

Improving energy density of crystalline–amorphous multilayer films deposited on Ti foils by structural modulation

Liu

Yao

2020

J. Am. Ceram. Soc.

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Over the past few decades, the ever-increasing global demand for energy supply and serious environmental challenges have affected the world considerably in many ways. 1-3 Developing advanced energy-storage technologies is an effective way to overcome the above problems and this option has been extensively investigated in the recent past. 4 Dielectric-based capacitors exhibit superior advantages owing to their ultrahigh power density and fast charge-discharge speed in comparison with chemical batteries and electrochemical supercapacitors. 2,5,6 However, their energy densities are much lower than that of chemical energy-storage systems, 7,8 which has become the main obstacle for their use in high-efficiency energy-storage devices. 9 Therefore, dielectric materials with high energy-storage densities are the need of the hour.

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Improving energy density of crystalline–amorphous multilayer films deposited on Ti foils by structural modulation

Liu

Yao

2020

J. Am. Ceram. Soc.

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Dielectric response of polycrystalline Sr1−1.5xBixTiO3 thin films under direct current bias

Okhay

Vilarinho

et al. 2010

Applied Physics Letters

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The effect of dc electric field Edc on the dielectric behavior of sol-gel derived Sr1−1.5xBixTiO3 films on Si/SiO2/TiO2/Pt substrates is systematically studied between 10 and 300 K. The rounded peak in the temperature dependence of the dielectric constant ε′(T) of all Sr1−1.5xBixTiO3 films is strongly suppressed under dc bias. The observed dielectric behavior is attributed to the formation of polar dipoles by the introduction of Bi into Sr site. A high tunability (∼40%) and communication quality factor (∼10 000) under 100 kV/cm make moderately Bi-doped SrTiO3 films a promising material for tunable devices.

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The new International Center for Dielectrics Research at Xi'an Jiaotong University: Recent activities and results

Ren

Yao

2010

2010 10th IEEE International Conference on Solid Dielectrics

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This paper aims at some problems that the management of graduate education is facing. Combining with the discipline construction, we carried out some attempts and researches on improving the quality of graduate students' recruitment and training practice for different disciplines, and generalizations, which based on the educational practice of graduate students at School of Aerospace, Xi'an Jiaotong University. The present work is a try for combining with the discipline features to improve the quality of graduate education. Graduate Education in China and the Discipline Present Situation and Existing Problems of Graduate Education Since the setting up of degree system in 1981, there were 4.26million master graduate students and 490,000 doctor graduate students which were trained in China [1]. By the end of 2014, the number of graduate students in China is 1.85million, of which the master graduate student 1.54 million people, a doctoral candidate at 310,000 [2]. It has become a great nation of graduate education in China. However, with the rapid expansion of scale of graduate students, the problems existing in the recruitment, training, etc. became progressively. Firstly, the increase of graduate student recruitment lacks on the investigation of the depth of the society and the market demand, and brings excess caused part of the professional talents, employment difficulty [3]. Secondly, to supervise and guarantee the process of graduate student training mechanism is not sound, and the quality of master graduate student training is not high. The figures show that the elimination rate of master graduate student is less than 5% in China, which is as high as 30% ~ 50% in developed countries. This situation of easy enrollment and easy graduation lowers the level of master degree [1]. Finally, the training talents are lack of international competitiveness, because of the slow internationalization of graduate education in China [3]. The Relationship between Graduate Education and Discipline The meaning of university discipline has become more than a pure academic concept, that has a certain administrative function and bears three functions which are the talents cultivation, scientific research and social service, based on academic or research area classification. The meaning of university discipline construction includes the tutor team construction, scientific research and technological innovation, personnel training and construction of foundation platform [4]. Graduate education is to train high-level talents to adapt to the social needs, which is measured by the quality of training talents [5]. Therefore, discipline is the basic unit of graduate education, and graduate education is the important connotation of discipline construction. The level and the feature of discipline determine the cultivation model of graduate students and professional quality, and graduate students grow in characteristic of discipline [6]. 135

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Structure and dielectric properties of (Sr1−1.5xBix)TiO3 thin films

Cited by 4 publications

References 23 publications

Improving energy density of crystalline–amorphous multilayer films deposited on Ti foils by structural modulation

Improving energy density of crystalline–amorphous multilayer films deposited on Ti foils by structural modulation

Dielectric response of polycrystalline Sr1−1.5xBixTiO3 thin films under direct current bias

The new International Center for Dielectrics Research at Xi'an Jiaotong University: Recent activities and results

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