Scientists in Japan are finding that perovskites have the potential to improve the fabrication of electrodes and wiring in ceramic-based electronics such as spark plugs.
Many ceramic-based electronics, such as spark plugs and multilayer ceramic capacitors (found in consumer electronics, mobile phones, DVDs and video cameras, for example), are composed of a combination of oxides and metals.
The oxides are used as a base to provide the product’s electric, optical or magnetic properties, while the metals are used in electrodes, which propagate the electrical signals. Fabricating these products is difficult because the physical properties of the oxides and metals are very different.
To achieve a high quality product, the manufacturing process needs to account for differences in synthesis temperatures and atmospheres, and for differences in expansion and shrinkage. A fabrication process that is optimized for the conducting metal electrodes can suppress the performance of the base oxides.
In a review paper published in the journal Science and Technology of Advanced Materials, a group of scientists in Japan investigated the potential of replacing metal electrodes in ceramic-based electronics with conductive oxides. Doing so could allow for more innovations in the ceramics industry.
Oxide electrodes in these ceramic-based products would need to be highly conductive (above 1000 Siemens/cm) and stable in air at temperatures ranging between room temperature and 1173 Kelvin (almost 900° Celsius).
The team of researchers, from NGK Spark Plug Company and Nagoya University, fabricated oxides that have the potential to replace metal electrodes and investigated their physical properties above room temperature. Lanthanum-based perovskite-type oxides were chosen as having a potential for industrial use because they do not contain expensive rare metals, they are not environmentally hazardous, and they are stable in air up to 1173 Kelvin.
Based on their investigations, the team found that the lanthanum-based perovskite-type oxide LaCo0.5Ni 0.5O3 showed high electronic conduction at high temperatures in air and was suitable for the fabrication of oxide electrodes and wiring in ceramic-based products.
For further information contact:
Dr. Hisashi Kozuka
NGK Spark Plug Co., Ltd.
2808, Iwasaki, Komaki-shi
Aichi 485-8510, Japan
Science and Technology of Advanced Materials (STAM) is the leading open access, international journal for outstanding research articles across all aspects of materials science. Our audience is the international materials community across the disciplines of materials science, physics, chemistry, biology as well as engineering.
The journal covers a broad spectrum of materials science research including functional materials, synthesis and processing, theoretical analyses, characterization and properties of materials. Emphasis is placed on the interdisciplinary nature of materials science and issues at the forefront of the field, such as energy and environmental issues, as well as medical and bioengineering applications
For more information about the journal Science and Technology of Advanced Materials, please contact
Science and Technology of Advanced Materials
Read the paper here
Sci. Technol. Adv. Mater. Vol. 16 (2015) 026001
Electronic conduction in La-based perovskite-type oxides
Hisashi Kozuka, Kazushige Ohbayashi, and Kunihito Koumoto
In borophene, boundaries are no barrier
17.07.2018 | Rice University
Research finds new molecular structures in boron-based nanoclusters
13.07.2018 | Brown University
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
17.07.2018 | Information Technology
17.07.2018 | Materials Sciences
17.07.2018 | Power and Electrical Engineering