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Nor Fatin Khairah Bahanurddin,Mohammad Hafizuddin Jumali,Julie Juliewatty Mohamed,Zainal Arifin Ahmad 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.2
Lead Zirconate Titanate (PZT) had previously been used as actuators and sensors in electronic application due to its remarkable piezoelectric properties. The main obstacle in the PZT syntheses through solid state sintering is the lost of substantial amount of PbO due to vaporation that accompanied high firing temperature. Elimination of the calcination step and alternative method of treatment could be of a great help. Thus, an investigation of the lead (Pb) Zirconate Titanate PZT properties (piezoelectric and dielectric) synthesized via solid-state reaction by varying compaction pressure (100-300 MPa) was conducted. Compaction pressure that was beneficial to the physical properties of PZT-based ceramic and also effectively improved the dielectric and piezoelectric properties of the PZT ceramics. Optimum average grain size was found to be a very important factor in determining the alignment of the d33 particle size value influence and the dielectric constant of PZT. Therefore, the optimum compaction pressure (200 MPa) played an important role in optimizing the sintering temperature. This also enhanced/improved the piezoelectric and dielectric properties of PZT.
Control of Nucleation and Grain Growth Processes in Lead Zirconate Titanate Thin Films
( Jang Sik Lee ) 대한금속재료학회(구 대한금속학회) 2007 ELECTRONIC MATERIALS LETTERS Vol.3 No.2
We found that single grains as large as 40 μm in length of lead zirconate titanate (PZT) thin film could be fabricated by lateral crystallization from the seeds. The seeds were prepared on a Pt substrate in the form of crystallized PZT dots. The electrical characteristics of PZT thin films obtained by selectively nucleated lateral crystallization (SNLC) were found to be superior to those of polycrystalline PZT thin films. In this paper, we review the mechanism for SNLC. From investigation into the nucleation and grain-growth processes in PZT thin films, we devised a novel annealing method that is suitable for SNLC of PZT thin films. It was found that scanning-rapid thermal annealing is a very effective method for SNLC in terms of reducing the process time and preventing undesirable nucleation in regions outside of pre-determined nucleation sites.
Deposition and XPS Study of Pb, Zr, and Ti Films
최수진,박주연,정은강,김법준,손서윤,이정민,이진성,조희진,박지훈,강용철 조선대학교 기초과학연구원 2014 조선자연과학논문집 Vol.7 No.3
Lead zirconate titanate (PZT) is significant material in electrical and optical devices for their ferroelectric, piezoelectricand dielectric properties. In this research, PZT films were fabricated by reactive RF co-sputtering method using Pb, Zr,and Ti targets. From XPS study, lead, zirconium, and titanium are successfully deposited on Si(100) substrate. Thicknessof PZT films was measured with a surface profiler and the thickness was decreased as the oxygen gas ratio increasedin the sputter gas.
Fabrication and Electrical Properties of PZT/BFO Multilayer Thin Films
Seo-Hyeon Jo,Sung-Pil Nam,이성갑,이승환,이영희,Young Gon Kim 한국전기전자재료학회 2011 Transactions on Electrical and Electronic Material Vol.12 No.5
Lead zirconate titanate (PZT)/ bismuth ferrite (BFO) multilayer thin films have been fabricated by the spin-coating method on Pt(200 nm)/Ti(10 nm)/SiO_2(100 nm)/p-Si(100) substrates using BiFeO_3 and Pb(Zr_(0.52)Ti_(0.48))O_3 metal alkoxide solutions. The PZT/BFO multilayer thin films show a uniform and void-free grain structure, and the grain size is smaller than that of PZT single films. The reason for this is assumed to be that the lower BFO layers play an important role as a nucleation site or seed layer for the formation of homogeneous and uniform upper PZT layers. The dielectric constant and dielectric losses decreased with increasing number of coatings, and the six-layer PZT/BFO thin film has good properties of 162 (dielectric constant) and 0.017 (dielectric losses) at 1 kHz. The remnant polarization and coercive field of three-layer PZT/BFO thin films were 13.86 μC/cm^2 and 37 kV/cm respectively.
Tensile test of lead zirconate titanate (PZT)/Platinum (Pt) thin film
Park, J.‐,H.,Bae, H.‐,Y.,Oh, Y.‐,R.,Kim, Y.‐,J.,Kim, H.Y.,Huh, Y.‐,H. WILEY‐VCH Verlag 2011 Materialwissenschaft und Werkstofftechnik Vol.42 No.5
<P><B>Abstract</B></P><P>This paper presents the results of tensile tests for lead zirconate titanate (PZT)/Platinum (Pt) thin films of 2.15 μm thickness in atmospheric air at room temperature. An axial loading tester developed by the authors was used for the tests. The tester was equipped with a load cell with a maximum capacity of 0.5 N and a non‐contact position measuring system based on the principle of capacitance micrometry. Furthermore, the tester was equipped with a CCD (charge‐coupled device) system for measuring the displacement of the gage length. Specimens with three different widths (50, 100 and 150 μm) were fabricated to study the size (width of specimen) effects. The elastic moduli of the specimens with 50, 100 and 150 μm width were 72.8 ± 3.7, 75.0 ± 1.3, 73.3 ± 1.8 GPa, respectively. In addition, the ultimate tensile strength of the specimens with 50, 100 and 150 μm width were 263.4 ± 21.1, 238.6 ± 4.5, 221.1 ± 13.9 MPa, respectively. It was observed that the width of specimen has little effect on the elastic modulus of PZT/Pt thin films but has an effect on the ultimate tensile strength of PZT/Pt thin films and the ultimate tensile strength decreases as the width increases. It was assumed that the scatter in the ultimate tensile strength of 50 μm width was attributed to delamination of PZT/Pt layers before the fracture in the tensile test. The 0.2% offset yield strength could not be measured because the PZT/Pt thin film is very brittle.</P>
Fabrication and Dielectric Properties of Pb(Zr0.52Ti0.48)O3 Nanofibers-Cement Composites
Mohammad Khajelakzay,Ehsan Taheri-Nassaj 대한금속·재료학회 2014 ELECTRONIC MATERIALS LETTERS Vol.10 No.1
In this study, the Pb(Zr0.52Ti0.48)O3 nanofibers-cement composites were fabricated and their dielectric properties were measured. First, lead zirconate titanate (Pb(Zr0.52Ti0.48)O3) nanofibers were synthesized using electrospinning method. Then, the Pb(Zr0.52Ti0.48)O3 nanofibers-cement composites were obtained by pressing the mixture of white cement and the Pb(Zr0.52Ti0.48)O3 nanofibers under a high pressure followed by steam curing. For the composite with 90 vol. %Pb(Zr0.52Ti0.48)O3 nonafibers, the values of εr and tanδ in 1 kHz frequency were obtained to be 777 and 0.067, respectively.
오영련(Young-Ryun Oh),배홍열(Hong-Yeol Bae),박준협(Jun-Hyub Park),김윤재(Yun-Jae Kim),김희연(Hee Yeoun Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
This paper presents the results of tensile test for Lead zirconate titanate (PZT)/Platinum (Pt) thin films. Specimens with three different widths (50, 100 and 150 ㎛) were fabricated to study the size (width of specimen) effects. The elastic moduli of the specimens with 50, 100 and 150 ㎛ width were 91.23, 87.45, 97.49 ㎬, respectively. In addition, ultimate tensile strength of the specimens with 50, 100 and 150 ㎛ width were 315.43, 292.71, 277.63 ㎫, respectively.
Deposition and XPS Study of Pb, Zr, and Ti Films
Choi, Sujin,Park, Juyun,Jeong, Eunkang,Kim, Beob Jun,Son, Seo Yoon,Lee, Jeong Min,Lee, Jin Seong,Jo, Hee Jin,Park, Jihun,Kang, Yong-Cheol The Basic Science Institute Chosun University 2014 조선자연과학논문집 Vol.7 No.3
Lead zirconate titanate (PZT) is significant material in electrical and optical devices for their ferroelectric, piezoelectric and dielectric properties. In this research, PZT films were fabricated by reactive RF co-sputtering method using Pb, Zr, and Ti targets. From XPS study, lead, zirconium, and titanium are successfully deposited on Si(100) substrate. Thickness of PZT films was measured with a surface profiler and the thickness was decreased as the oxygen gas ratio increased in the sputter gas.
Selective Growth of Au Nanoparticles on PZT Substrates by Using a Photochemical Reaction
김정훈,양우철 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.10
We report the surface distribution of Au nanoparticles (NPs) grown on polarity-patterned ferroelectrics by using photochemical-reaction deposition. Polycrystalline lead zirconate titanate (PZT) was used as a ferroelectric substrate. The local polarization orientation on the surface was patterned by using atomic force microscopy (AFM). The Au NPs were grown by ultraviolet (UV) light exposure of the polarity-patterned PZT substrates while immersed in Au salt solutions. The wavelength dependence of the deposition of the NPs was investigated using UV band pass filters. The dimensions and the surface distribution of the NPs were measured by using AFM. For UV light without a filter, more NPs were formed on the +z polarity region than on the other regions. However, for UV light with wavelengths of 315 nm and 365 nm, we observed the selective deposition of NPs on +z polar domains. The NPs on the +z polar domains were denser and larger than those on the other non-polar regions. The average size of the NPs was ∼30 nm and the number density was ∼22/μm<sup>2</sup>. In addition, the electron affinity of the PZT was found to be 3.0 eV from scanning Kelvin probe microscopy measurements of the PZT film surface with the deposition of Au NPs. This study suggests the possibility of controlling the sizes and the positions of Au NPs on a surface by optimizing the UV wavelength and polarity patterning of the ferroelectrics.
Or, Siu Wing,Chan, Helen Lai Wa,Liu, Peter Chou Kee Techno-Press 2005 Smart Structures and Systems, An International Jou Vol.1 No.1
A ring-shaped lead zirconate titanate (PZT) piezoceramic sensor has been integrated with the Langevin-type piezoceramic driver of an ultrasonic wire-bonding transducer to form a smart transducer for in-situ measurement of three essential bonding parameters: namely, impact force, ultrasonic amplitude and bond time. This sensor has an inner diameter, an outer diameter and a thickness of 12.7 mm, 5.1 mm and 0.6 mm, respectively. It has a specifically designed electrode pattern on the two major surfaces perpendicular to its thickness along which polarization is induced. The process-test results have indicated that the sensor not only is sensitive to excessive impact forces exerted on the devices to be bonded but also can track changes in the ultrasonic amplitude proficiently during bonding. Good correlation between the sensor outputs and the bond quality has been established. This smart transducer has good potential to be used in automatic process-control systems for ultrasonic wire bonding.