نتایج جستجو برای: pzt

تعداد نتایج: 2045  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم پایه 1392

در دو دهه اخیر تحقیقات گسترده ای در مورد تولید مواد فروالکتریک نانوساختار مانند تیتانات زیرکونات سرب (pzt) با فرمول عمومی pb(zr1-xtix)o3 انجام گردید. در این تحقیق نانوپودر، نانولوله یک بعدی و نانولوله با قطر غیر یکنواخت این ماده به ازای 48/0x= به روش سل ژل و نهشت چرخشی بر پایه قالب تهیه شدند. پس از یافتن دمای کلسینه مناسب برای تولید نانوپودرهای pzt (°c 750)، آن ها را در ph های مختلف 3، 4، 5، 6،...

2013
Caifeng Chen Daiwei Hong Andong Wang Chaoying Ni

Flexible piezoelectric PZT/fabric composite material is pliable and tough in nature which is in a lack of traditional PZT patches. It has great application prospect in improving the sensitivity of sensor/actuator made by piezoelectric materials especially when they are used for curved surfaces or complicated conditions. In this paper, glass fiber cloth was adopted as carrier to grow PZT piezoel...

1997
Chengkuo Lee Takahiro Ohashi Ryutaro Maeda Tadatomo Suga

We report on the first successful operation of a cyclic contact scanning force microscope ~SFM! using a self-excited cantilever in liquid. Based on a new structure including a PZT reference pattern and a free-standing PZT cantilever, the piezoelectric self-excitation and self-detection mechanism for a PZT microcantilever was developed successfully. The topography is recorded by measuring the pi...

2016
Zhijie Wang Dawei Cao Liaoyong Wen Rui Xu Manuel Obergfell Yan Mi Zhibing Zhan Nasori Nasori Jure Demsar Yong Lei

Utilizing plasmonic nanostructures for efficient and flexible conversion of solar energy into electricity or fuel presents a new paradigm in photovoltaics and photoelectrochemistry research. In a conventional photoelectrochemical cell, consisting of a plasmonic structure in contact with a semiconductor, the type of photoelectrochemical reaction is determined by the band bending at the semicondu...

2015
An-Shen Siao Ching-Kong Chao Chun-Ching Hsiao

Pyroelectric harvesters convert time-dependent temperature variations into electric current. The appropriate geometry of the pyroelectric cells, coupled with the optimal period of temperature fluctuations, is key to driving the optimal load resistance, which enhances the performance of pyroelectric harvesters. The induced charge increases when the thickness of the pyroelectric cells decreases. ...

2004
B. J. Rodriguez A. Gruverman R. J. Nemanich

A combination of vertical and lateral piezoresponse force microscopy ~VPFM and LPFM, respectively! has been used to map the out-of-plane and in-plane polarization distribution, respectively, of ~111!-oriented Pb(Zr,Ti)O3-based ~PZT! ferroelectric patterned and reactively-ion-etched capacitors. While VPFM and LPFM have previously been used to determine the orientation of the polarization vector ...

2017
Guo-Hua Feng Kuan-Yi Lee

This paper presents a study of lead zirconate titanate (PZT) films hydrothermally grown on a dome-shaped titanium diaphragm. Few articles in the literature address the implementation of hydrothermal PZT films on curved-diaphragm substrates for resonators. In this study, a 50-μm-thick titanium sheet is embossed using balls of designed dimensions to shape a dome-shaped cavity array. Through singl...

2009
Ebru Mensur Alkoy Canan Dagdeviren Melih Papila

Lead zirconate titanate (PZT) nanofibers are obtained by electrospinning a sol–gel based solution and polyvinyl pyrrolidone (PVP) polymer, and by subsequent sintering of the electrospun precursor fibers. The average diameter of the precursor PZT/ PVP green fibers has increased with the aging of the precursor solution along with an increase in the viscosity. Bead-free uniform green PZT/PVP fiber...

2005
Ryan J. Ong David A. Payne Nancy R. Sottos

Processing effects on the dielectric properties of sol–gel-derived PbZrO3–PbTiO3 (PZT) films integrated onto Pt/Ti/SiO2//Si substrates are reported. Sol–gel synthesis and deposition conditions were designed to produce films of varying thickness (95–500 nm) with consistent chemical composition (Pb (Zr0.53Ti0.47)O3), phase content (perovskite), grain size (B110 nm), crystallographic orientation (...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده فنی مهندسی 1390

در این تحقیق نانوالیاف تیتانات زیرکونات سرب pb(zr0.52,ti0.48)o3 به روش سل-ژل با استفاده از پلی وینیل پیرولیدون (pvp) توسط فرآیند الکتروریسی سنتز شد. برای تهیه سل مورد نظر از تری هیدرات استات سرب، زیرکونیوم پروپوکساید، تترا ایزوپروپیل اورتوتیتانات و 2-متوکسی اتانول استفاده شد. از این مواد سل شفافی تهیه شده و با نسبت مناسبی، به محلول pvp در 2-متوکسی اتانول، اضافه شد. پس از بدست آمدن یک ویسکوزیته ...

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