Influence of various sintering parameters and the temperature dependent scaling on the dynamic hysteresis behavior of Ba0.9Ca0.05Sr0.05T0.85Zr0.15O3 ceramics

2020 ◽  
Vol 17 (1) ◽  
pp. 273-290
Author(s):  
P. Suresh ◽  
P. Mathiyalagan ◽  
K.S. Srikanth
Keyword(s):  
Electric Field ◽  
Coercive Field ◽  
Remnant Polarization ◽  
Sintering Temperature ◽  
Scaling Relations ◽  
Temperature Dependent ◽  
Content Type ◽  
Hysteresis Behavior ◽  
Dynamic Hysteresis ◽  
Ferroelectric Hysteresis

PurposeThe article explores the effect of sintering temperature on the ferroelectric hysteresis behavior of the synthesized ceramic material Ba0.9Ca0.05Sr0.05T0.85Zr0.15O3 (BCSTZO). It describes how the sintering temperature and its holding time have effect on the polarization-electric field (P-E) loops which is an important characteristic of a ferroelectric material. From the P-E loops obtained, various representative parameters like remnant polarization and coercive field values were extracted and scaling results were systematically established using them.Design/methodology/approachThe present article describes the establishment of scaling relations for coercive field (Ec), remnant polarization (Pr) and back switching polarization (Pbc) as a function of temperature which have been obtained from P-E loops sintered at various temperature and time. This is because sintering temperature plays a pivotal role in determining the hysteresis parameters.FindingsThe temperature dependent scaling of Ec and Pr at sintering temperature of 1400, 1425, 1450 and 1475 °C yields EcαT0.40, EcαT0.80, EcαT0.47, EcαT0.29 and PrαT−1.72, PrαT−1.55, PrαT−1.72, PrαT−1.69 respectively. Further the scaling relations for the samples sintered at 1450 °C at different time interval of 3, 4, 5 and 6 h was also established to bring the effect of sintering in switching the ferroelectric hysteresis parameters.Originality/valueThe findings of this work will prove beneficial for the researchers working in optimization of sintering parameters and will benefit researchers selecting best material among the fabricated samples for further property enhancement. The optimized sample could be explored for multifunctional applications ranging from pyroelectric voltage to piezoelectric energy harvesting. In addition to this, the scaling results help to understand the nature of ferroelectric parameters with sintering. This may open up new avenues for studying the scaling behavior of dynamic hysteresis in synthesized material by focusing on hysteresis area as a function of applied electric fields, frequency and temperature. This reason owes to the fact that electric field and frequency are important parameters for a number of applications like sensor, transducers and medical applications.

Transient thermal finite-element analysis of fused filament fabrication process

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chitralekha Nahar ◽  
Pavan Kumar Gurrala
Keyword(s):  
Finite Element ◽  
Thermal Properties ◽  
Thermal Behavior ◽  
Sintering Temperature ◽  
Bond Formation ◽  
Processing Parameters ◽  
Temperature Dependent ◽  
Fused Filament Fabrication ◽  
Time Duration ◽  
Content Type

Purpose The thermal behavior at the interfaces (of the deposited strands) during fused filament fabrication (FFF) technique strongly influences bond formation and it is a time- and temperature-dependent process. The processing parameters affect the thermal behavior at the interfaces and the purpose of the paper is to simulate using temperature-dependent (nonlinear) thermal properties rather than constant properties. Design/methodology/approach Nonlinear temperature-dependent thermal properties are used to simulate the FFF process in a simulation software. The finite-element model is first established by comparing the simulation results with that of analytical and experimental results of acrylonitrile butadiene styrene and polylactic acid. Strand temperature and time duration to reach critical sintering temperature for the bond formation are estimated for one of the deposition sequences. Findings Temperatures are estimated at an interface and are then compared with the experimental results, which shows a close match. The results of the average time duration (time to reach the critical sintering temperature) of strands with the defined deposition sequences show that the first interface has the highest average time duration. Varying processing parameters show that higher temperatures of the extruder and envelope along with higher extruder diameter and lower convective heat transfer coefficient will have more time available for bonding between the strands. Originality/value A novel numerical model is developed using temperature-dependent (nonlinear) thermal properties to simulate FFF processes. The model estimates the temperature evolution at the strand interfaces. It helps to evaluate the time duration to reach critical sintering temperature (temperature above which the bond formation occurs) as it cools from extrusion temperature.

Dynamic Hysteresis Scaling in BaTiO3 Bulk Ceramics

2009 ◽  
Vol 421-422 ◽  
pp. 399-402 ◽  
Author(s):  
Natthapong Wongdamnern ◽  
Athipong Ngamjarurojana ◽  
Supon Ananta ◽  
Yongyut Laosiritaworn ◽  
Rattikorn Yimnirun
Keyword(s):  
Field Condition ◽  
Coercive Field ◽  
Field Amplitude ◽  
Scaling Behavior ◽  
The Other ◽  
Scaling Relations ◽  
Scaling Relation ◽  
Dynamic Hysteresis ◽  
Other Hand

The scaling behavior of the dynamic hysteresis of ferroelectric BaTiO3 bulk ceramics was investigated. Two sets of the scaling relation of hysteresis area <A> against frequency f and field amplitude E0 were clearly established. Approximately, above the coercive field, the scaling took a form of <A>  f -0.23E00.87. On the other hand, the scaling in the form of <A>  f -0.36E03.64 was obtained under a sub-coercive field condition. While these scaling relations were generally comparable to previously reported ones, it was found that the f- and E0 exponents clearly depended on E0 and f, respectively.

Ferroelectric Properties of Pb(Zr1/2Ti1/2)O3-Pb(Zn1/3Nb2/3)O3 Ceramics under Compressive Stress Applied Perpendicular to Electric Field

2009 ◽  
Vol 421-422 ◽  
pp. 411-414 ◽  
Author(s):  
Muangjai Unruan ◽  
Thanapong Sareein ◽  
Anurak Prasatkhetragarn ◽  
Athipong Ngamjarurojana ◽  
Supon Ananta ◽  
...  
Keyword(s):  
Electric Field ◽  
Compressive Stress ◽  
Mixed Oxide ◽  
Coercive Field ◽  
Remanent Polarization ◽  
Domain Walls ◽  
Domain Switching ◽  
Ferroelectric Properties ◽  
Electric Field Direction ◽  
Ferroelectric Hysteresis

Effects of perpendicular compressive stress on the ferroelectric properties of ceramics in PZT-PZN system were investigated. The (1-x)Pb(Zr1/2Ti1/2)O3-xPb(Zn1/3Nb2/3)O3 or (1-x)PZT- (x)PZN (x = 0.1-0.5) ceramics were prepared by a conventional mixed-oxide method. The ferroelectric properties were measured under compressive stress applied perpendicular to an electric field direction at stress levels up to 90 MPa using a compressometer in conjunction with a modified Sawyer-Tower circuit. It was found that with increasing compressive stress the area of the ferroelectric hysteresis (P-E) loops, the maximum polarization (Pmax), and the remanent polarization (Pr) decreased, while the coercive field (Ec) remained relatively constant. These results were interpreted through the domain switching, clamping of domain walls and de-poling mechanisms.

SCALING BEHAVIOR OF DYNAMIC HYSTERESIS IN PZT-BASED FERROELECTRIC BULK CERAMICS

2008 ◽  
Vol 01 (02) ◽  
pp. 133-137 ◽  
Author(s):  
RATTIKORN YIMNIRUN
Keyword(s):  
Significant Role ◽  
Hysteresis Loops ◽  
Universality Class ◽  
Ferroelectric Materials ◽  
Scaling Behavior ◽  
Scaling Relations ◽  
Dynamic Behaviors ◽  
Hysteresis Behavior ◽  
Dynamic Hysteresis ◽  
Domain Structures

The scaling relations for the hysteresis loops of soft and hard PZT bulk ceramics were obtained in the forms of <A> ∝ f -0.25E0 and [Formula: see text], respectively, while those for the minor loops took the forms of [Formula: see text] and [Formula: see text]. The similarity of the scaling relations suggested that the scaling behaviors of the two types of bulk ceramics were in the same universality class and that the complex defects contributed only slightly to the dynamic behaviors. Finally, this study implied that the domain structures played significant role in controlling dynamic hysteresis behavior of ferroelectric materials.

Electric field distribution and voltage breakdown modeling for any PN junction

2016 ◽  
Vol 35 (1) ◽  
pp. 137-156 ◽  
Author(s):  
N. Rouger
Keyword(s):  
Numerical Methods ◽  
Electric Field ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Poisson’S Equation ◽  
Doping Profile ◽  
Distribution Analysis ◽  
Poisson's Equation ◽  
Content Type ◽  
Pn Junction

Purpose – Scientists and engineers have been solving Poisson’s equation in PN junctions following two approaches: analytical solving or numerical methods. Although several efforts have been accomplished to offer accurate and fast analyses of the electric field distribution as a function of voltage bias and doping profiles, so far none achieved an analytic or semi-analytic solution to describe neither a double diffused PN junction nor a general case for any doping profile. The paper aims to discuss these issues. Design/methodology/approach – In this work, a double Gaussian doping distribution is first considered. However, such a doping profile leads to an implicit problem where Poisson’s equation cannot be solved analytically. A method is introduced and successfully applied, and compared to a finite element analysis. The approach is then generalized, where any doping profile can be considered. 2D and 3D extensions are also presented, when symmetries occur for the doping profile. Findings – These results and the approach here presented offer an efficient and accurate alternative to numerical methods for the modeling and simulation of mathematical equations arising in physics of semiconductor devices. Research limitations/implications – A general 3D extension in the case where no symmetry exists can be considered for further developments. Practical implications – The paper strongly simplify and ease the optimization and design of any PN junction. Originality/value – This paper provides a novel method for electric field distribution analysis.

Sign in / Sign up

Export Citation Format

Share Document