Home > Press > Making electronics safer with perovskites: Scientists in Japan are developing methods to manufacture safer ceramic capacitors
A team of scientists from Hokkaido University and the multinational electronics company TDK Corporation in Japan has developed a method to improve the insulating properties of the oxynitride perovskite SrTaO2N for potential use as a ceramic capacitor. CREDIT: Tanusin Phunya/ 123rf |
Abstract:
Ceramic capacitors are used in a wide variety of electronics, ranging from computers and mobile phones to telecommunications transmitter stations and high voltage laser power supplies. Capacitors act, in a way, like batteries. They are "dielectric" - they act as an electronic insulator in which an electric field can be sustained with minimum loss of power. Their dielectric properties allow them to store electricity and then release it. One of the most widely used ceramics in capacitors is lead zirconate titanate, but it is hazardous to the health and the environment once it's disposed. Scientists are trying to find other less hazardous ceramic materials for use in capacitors.
Perovskite oxynitrides - cheap and easily fabricated materials with a distinctive crystalline structure - are particularly promising. But ceramics manufactured from these materials need to be made denser to improve their insulating properties. This is usually done by applying intense heat; a process called "sintering". However, sintering the material can lead to a change in its chemical composition, turning it from an insulator to an electrical conductor.
The researchers sintered the perovskite powder SrTaO2N at a temperature of 1723 Kelvin (1450° Celsius) for three hours. They then "annealed" the material by heating it with flowing ammonia at 1223 Kelvin (950° Celsius) for 12 hours and then allowing it to slowly cool.
They found that the surface of the material after this process (but not its interior) displayed an important dielectric property called "ferroelectricity". This was the first time that a ferroelectric response has been observed on oxynitride perovskite ceramics, they say, making it promising as a new dielectric material for multi-layered ceramic capacitors.
####
For more information, please click here
Contacts:
Shinichi Kikkawa
Copyright © Hokkaido University
If you have a comment, please Contact us.Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Related Links |
Related News Press |
News and information
Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024
NRL charters Navy’s quantum inertial navigation path to reduce drift April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
Possible Futures
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024
Discoveries
Chemical reactions can scramble quantum information as well as black holes April 5th, 2024
New micromaterial releases nanoparticles that selectively destroy cancer cells April 5th, 2024
Utilizing palladium for addressing contact issues of buried oxide thin film transistors April 5th, 2024
Announcements
NRL charters Navy’s quantum inertial navigation path to reduce drift April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
Environment
Billions of nanoplastics released when microwaving baby food containers: Exposure to plastic particles kills up to 75% of cultured kidney cells July 21st, 2023
Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage
What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024
A battery’s hopping ions remember where they’ve been: Seen in atomic detail, the seemingly smooth flow of ions through a battery’s electrolyte is surprisingly complicated February 16th, 2024
The latest news from around the world, FREE | ||
Premium Products | ||
Only the news you want to read!
Learn More |
||
Full-service, expert consulting
Learn More |
||