Rare materials used in electronics synthesised from common elements Electronics News

JAPANESE scientists have come up with a way to synthesise materials used in electronics using naturally abundant elements, bypassing the supply issues surrounding rare elements.

This news comes on the back of another Japanese discovery which could end the choke-hold that China has on the rare earths market used in a variety of technology components.

Earlier this week, a team from the University of Tokyo found the Pacific seabed near Hawaii and Tahiti may house massive stores of rare earth elements, which can be accessed and extracted much more easily compared to mining on land.

China, until now, has been the world’s main source of rare elements. This has allowed it to control supply, most notably to Japan.

Now, in a review article published in the journal Science and Technology of Advanced Materials, scientists from the Tokyo Institute of Technology describe their research on the synthesis of oxide materials based on 20 to 30 abundant elements, including Si, Al, Ca, Na and Mg.

This “ubiquitous element strategy” could further help overcome the “rare-element crisis”, which is being led by increasing demand for such elements as lithium, used in batteries, and dysprosium for Ne-Fe-B permanent magnets.

Key to this latest research is an in-depth knowledge of the role of elements in the physical properties of materials, which has been made available from research on the science and technology of nanometer-sized materials.

The synthesised materials, converted from those common elements, exhibit properties similar to or superior to their rare-element equivalents, and the authors of the paper describe the synthesis, properties, and applications of these materials, which include their use for light-emitting, electron field emitters, and nonvolatile memories.

The researchers also found it was possible to efficiently produce large quantities of ionised oxygen by incandescent heating of a 2mm diameter tube of yttria-doped zirconia.

Ionised oxygen is used in the electronics industry to produce silicon diode layers on semiconductors. Conventional methods rely on the catalytic action of the rare Pt metal.

 Rare materials used in electronics synthesised from common elements Electronics News