Optimizing Electrocaloric Effect in Barium Titanate-Based Room Temperature Ferroelectrics: Combining Landau Theory, Machine Learning and Synthesis

2022 ◽  
Author(s):  
Ruihao Yuan ◽  
Zhen Liu ◽  
Yangyang Xu ◽  
Ruowei Yin ◽  
Jingjin He ◽  
...  
Keyword(s):  
Machine Learning ◽  
Barium Titanate ◽  
Room Temperature ◽  
Landau Theory ◽  
Electrocaloric Effect

Enhanced room temperature electrocaloric effect in barium titanate thin films with diffuse phase transition

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 21826 ◽  
Author(s):  
Lijie Wang ◽  
Jinbin Wang ◽  
Bo Li ◽  
Xiangli Zhong ◽  
Fang Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Barium Titanate ◽  
Diffuse Phase Transition ◽  
Room Temperature ◽  
Electrocaloric Effect ◽  
Diffuse Phase

Room‐Temperature Symmetric Giant Positive and Negative Electrocaloric Effect in PbMg 0.5 W 0.5 O 3 Antiferroelectric Ceramic

2021 ◽  
pp. 2101176
Author(s):  
Junjie Li ◽  
Hong‐Hui Wu ◽  
Jianting Li ◽  
Xiaopo Su ◽  
Ruowei Yin ◽  
...  
Keyword(s):  
Room Temperature ◽  
Electrocaloric Effect

scholarly journals DISAIN SISTEM OTOMASI SUHU RUANGAN PERTEMUAN DENGAN PENERAPAN TEKNIK MACHINE LEARNING

2019 ◽  
pp. 117-120
Author(s):  
Stephanie Imelda Pella ◽  
Hendro FJ L
Keyword(s):  
Machine Learning ◽  
Object Detection ◽  
Room Temperature ◽  
Cooling System ◽  
Raspberry Pi ◽  
Air Cooling ◽  
Minimum Value ◽  
Air Cooling System ◽  
Four Levels ◽  
And Control

This research presents an automation process of controlling room temperature based on the number of people detected in a room. The system consists of a single board raspberry pi computer, esp8266 micro controller, pi camera, and an infrared module. This research is divided into two parts, namely object detection using Raspbery Pi and Tensorflow and Open CV libraries and controlling air cooling system (ACS) using esp8266 and infrared modules by transmitting hexadecimal AC control codes. The ACS temperature is divided into four levels with a minimum value at 18o C and a maximum at 24o C. System testings were carried out in an empty room and a room with a capacity of 50 people that is fully occupied. The results show that the system is able to detect the number of people in the room and control the ACS, but under certain conditions some objects are not detected because the position and camera tilt is not optimal.

Enhanced electrocaloric effect in lead-free organic and inorganic relaxor ferroelectric composites near room temperature

2018 ◽  
Vol 112 (19) ◽  
pp. 193902 ◽  
Author(s):  
Haibibu Aziguli ◽  
Xin Chen ◽  
Yang Liu ◽  
Guang Yang ◽  
Ping Yu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Relaxor Ferroelectric ◽  
Lead Free ◽  
Electrocaloric Effect

Electrocaloric Effect of (110) Oriented KNbO3 Film

2021 ◽  
Vol 21 (10) ◽  
pp. 5247-5252
Author(s):  
MinYa Jin ◽  
JianHua Qiu ◽  
ZhiHui Chen ◽  
XiuQin Wang ◽  
NingYi Yuan ◽  
...  
Keyword(s):  
Electric Field ◽  
Thermodynamic Equilibrium ◽  
Thermodynamic Potential ◽  
Room Temperature ◽  
Misfit Strain ◽  
Equilibrium Conditions ◽  
Electrocaloric Effect ◽  
Phase Map ◽  
The Stability

The room temperature electrocaloric effect is researched for (110) oriented KNbO3 film based on Landau-Devonshire theory. The phase map with different ferroelectric states is built at room temperature with the considerations of thermodynamic equilibrium conditions and minimum of thermodynamic potential. Five ferroelectric structural phases are obtained theoretically. The negative in-plane misfit strains are conducive to form the tetragonal c phase and the positive strains are in favor of the stability of tetragonal a1 and a2 phases. The electrocaloric effect relies on both misfit strain and electric field. Moreover, large electrocaloric effect is achieved in the orthorhombic phases.

Fabrication and Morphological Characterization of Barium Titanate-Based Polymeric Nanocomposite Thin Films

2018 ◽  
pp. 50-59 ◽  
Author(s):  
Sudhanshu Singh ◽  
Umesh Kumar Dwivedi
Keyword(s):  
Barium Titanate ◽  
Room Temperature ◽  
Composite Films ◽  
Morphological Characterization ◽  
Solution Casting ◽  
Weight Percentage ◽  
Casting Technique ◽  
Nanocomposite Thin Films ◽  
Solution Casting Technique

In this critical review chapter, the authors explain the development of composite films of Barium Titanate (BaTiO3) and Poly (methyl methacrylate) prepared by solution casting technique. Different weight percentage composition of BaTiO3 has been selected to find out the best optimization condition for further investigation and correlate the results. The structural properties have been carried out at room temperature using XRD. Efforts have been made to correlate the results with investigated XRD results of pure BaTiO3 and its composites as observed by other workers at room temperature. The flow of experimental work and microscopic images are explained.

Sign in / Sign up

Export Citation Format

Share Document