Dielectric and Pyroelectric Characteristics of Plzt (9.5/65/35) Relaxor Thin Films

1995 ◽  
Vol 403 ◽  
Author(s):  
K. K. Deb
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Figure Of Merit ◽  
Ferroelectric Ceramic ◽  
Pyroelectric Coefficient ◽  
Ir Detector ◽  
Lanthanum Aluminate ◽  
Lower Dielectric Constant ◽  
High Figure ◽  
Detector Materials

AbstractFerroelectric relaxor thin films of lead lanthanide zirconate titanate (PLZT) (9.5/ 65/35) have been deposited by the laser ablation technique onto metallized silicon and lanthanum aluminate substrates. The dielectric and pyroelectric properties of PLZT films and their temperature dependencies have been investigated in some detail in an evaluation of their potential as prospective pyroelectric infrared (IR) detector materials. The temperature at which the dielectric constant of a PLZT film reaches its peak is different from that for the peak pyroelectric coefficient. A lower dielectric constant at which the pyroelectric peak appears contributes to a high figure of merit for PLZT films, so that it is competitive with its ceramic counterpart, as well as with Pb(Mg1/3Nb2/3)O3 (PMN) relaxor ferroelectric ceramic.

Transparent conducting p-type thin films of c-axis self-oriented Bi2Sr2Co2Oy with high figure of merit

2014 ◽  
Vol 50 (68) ◽  
pp. 9697-9699 ◽  
Author(s):  
Renhuai Wei ◽  
Xianwu Tang ◽  
Ling Hu ◽  
Zhenzhen Hui ◽  
Jie Yang ◽  
...  
Keyword(s):  
Thin Films ◽  
Figure Of Merit ◽  
Solution Method ◽  
Transparent Conducting ◽  
High Figure ◽  
P Type

Transparent conducting p-type Bi2Sr2Co2Oy thin films show c-axis self-orientation with high figure of merit by a solution method.

Ferroelectric and Optical Properties of BST/BZT/BST Sandwich Structure Thin Films Prepared by RF Sputtering

2012 ◽  
Vol 164 ◽  
pp. 47-51 ◽  
Author(s):  
Cai Bing Ma ◽  
Xin Gui Tang ◽  
De Ping Xiong ◽  
Yan Ping Jiang ◽  
Qiu Xiang Liu
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Optical Properties ◽  
Sandwich Structure ◽  
Rf Sputtering ◽  
Dissipation Factor ◽  
Cross Sectional ◽  
Lower Dielectric Constant ◽  
Bst Thin Film ◽  
Ceramic Targets

In this work, (Ba0.65Sr0.35)TiO3 (BST) and Ba(Zr0.20Ti0.80)O3 (BZT) ceramic targets were prepared using the traditional solid-state reaction technique, which were sintered at 1200 °C for 2 h. The thin films of BST, BZT and sandwich structure BST/BZT/BST were grown on Pt/Ti/SiO2/Si(100) and Si(100) substrates by rf-sputtering at 500 °C, respectively. And all samples crystallied at temperatures 650 °C for 30 min in oxygen atmosphere. The cross-sectional images of the thin films were characterized by scanning electron microscope (SEM). The dielectric constant and dissipation factor tan of the BZT, BST and BST/BZT/BST thin films are 680 and 0.030, 240 and 0.021, 85 and 0.018, respectively at 100 kHz. Compared with BST and BZT films, the BST/BZT/BST film has lower dielectric constant and lower dissipation. The remanent polarization (Pr) of the sandwich structure BST/BZT/BST thin film is up to 9.57 μC/cm2, the Pr value is larger than that BST (0.25μC/cm2) film and BZT (8.45μC/cm2) film. The optical properties (refractive index n and extinction coefficient k) of the BST/BZT/BST film on Si(100) substrate were measured by n & k analyzer 2000.

High figure of merit transparent conducting Sb-doped SnO 2 thin films prepared via ultrasonic spray pyrolysis

2017 ◽  
Vol 720 ◽  
pp. 79-85 ◽  
Author(s):  
Vivi Fauzia ◽  
M.N. Yusnidar ◽  
Latifa Hanum Lalasari ◽  
Achmad Subhan ◽  
Akrajas Ali Umar
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Figure Of Merit ◽  
Ultrasonic Spray Pyrolysis ◽  
Ultrasonic Spray ◽  
Transparent Conducting ◽  
High Figure

Enhanced transparent conducting performance of c-axis oriented Ca3Co4O9 thin films

RSC Advances ◽  
2015 ◽  
Vol 5 (33) ◽  
pp. 26383-26387 ◽  
Author(s):  
Guangsheng Fu ◽  
Guoying Yan ◽  
Liqing Sun ◽  
Hongrui Zhang ◽  
Haizhong Guo ◽  
...  
Keyword(s):  
Thin Films ◽  
Figure Of Merit ◽  
Transparent Conducting ◽  
High Figure ◽  
P Type

c-axis oriented Ca3Co4O9 p-type transparent conducting thin films with high figure of merit.

Pyroelectric characteristics of modified barium titanate ceramics

1992 ◽  
Vol 7 (12) ◽  
pp. 3296-3305 ◽  
Author(s):  
K.K. Deb ◽  
M.D. Hill ◽  
J.F. Kelly
Keyword(s):  
Barium Titanate ◽  
Figure Of Merit ◽  
Transverse Mode ◽  
Pyroelectric Coefficient ◽  
Barium Zirconate ◽  
Charge Coupled Device ◽  
High Figure ◽  
Titanate Ceramics ◽  
Ccd Arrays ◽  
Very High

BaZrO3 and BaHfO3 modified polycrystalline BaTiO3 are candidate materials for transverse mode and pyroelectric charge coupled device (CCD) arrays. Addition of 3–4% barium zirconate and barium hafnate to barium titanate alters the temperature of phase transformations and with it, dielectric and pyroelectric properties. These additions create a temperature range close to room temperature where the pyroelectric coefficient is extremely high relative to the dielectric permittivity. These materials show a very high figure of merit for dielectric bolometer applications that is competitive with existing materials, while being relatively easy to prepare.

Influence of Grain-Growth Inhibiting Dopants on the Electrophysical Properties of Rhombohedral Pyroelectric Lead Zirconate-Titanate Ceramics

1991 ◽  
Vol 243 ◽  
Author(s):  
Jean-Paul Hahn ◽  
Gernot Kostorz
Keyword(s):  
Lead Zirconate Titanate ◽  
Figure Of Merit ◽  
Sintered Density ◽  
Lead Zirconate ◽  
Pyroelectric Coefficient ◽  
Low Dielectric Constant ◽  
Electrophysical Properties ◽  
Low Dielectric ◽  
High Figure ◽  
Titanate Ceramics

AbstractThe aim of this work was to develop a ceramic material exhibiting a large pyroelectric coefficient p = -dP/dT (P = polarization, T = temperature) and a low dielectric constant ∈ in order to obtain a high figure of merit F = p/∈pCp for applications in infrared temperature sensing (p denotes the sintered density of the ceramic, cp the specific heat). The influence of the dopants is paramount, and it was only possible to investigate a few promising ones. Best results were obtained for PZT 60/40 (Zr:Ti=60:40) doped with 2 mol% MnO2. The effects of various dopants and some aging results for PZT 60/40 with MnO2 are presented.

Piezoelectric, Dielectric and Pyroelectric Property in Morphotropic Phase Boundary MnO2 Doped Bi0.5(Na0.82K0.18)0.5TiO3/P(VDF-TrFE) 0-3 Composites

2012 ◽  
Vol 535-537 ◽  
pp. 55-60
Author(s):  
Mao Yan Fan ◽  
Yang Yang Zhang ◽  
Qing Feng Zhang ◽  
Guang Zu Zhang ◽  
Lin Lu
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Figure Of Merit ◽  
Piezoelectric Coefficient ◽  
Volume Fraction ◽  
Ceramic Powder ◽  
Pyroelectric Coefficient ◽  
Pyroelectric Property

MnO2 doped Bi0.5(Na0.82K0.18)0.5TiO3/P(VDF-TrFE) 0-3 composites with high pyroelectric coefficient were prepared for different volume fractions of MnO2 doped Bi0.5(Na0.82K0.18)0.5TiO3 ceramic powder in P(VDF-TrFE) copolymer matrix. The dielectric constant, dielectric loss and the piezoelectric coefficient increased as MnO2 doped Bi0.5(Na0.82K0.18)0.5TiO3 ceramic volume fraction increased. The pyroelectric coefficient and figure of merit of Bi0.5(Na0.82K0.18)0.5TiO3/P(VDF-TrFE) with different MnO2 amount and 0.8mol% MnO2 doped Bi0.5(Na0.82K0.18)0.5TiO3/P(VDF-TrFE) as a function of ceramic volume fraction were studied respectively. The results indicated that 0.8mol% MnO2 doped Bi0.5(Na0.82K0.18)0.5TiO3/P(VDF-TrFE) in 20vol% ceramic volume fraction show the best pyroelectric properties with pyroelectric coefficient p= 7.8×10-5C/m2K and figure of merit FD=11.4×10-6Pa-0.5.

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