polycrystalline Archives | The American Ceramic Society

polycrystalline

High heat and pressure help researchers fabricate first samples of transparent silicon nitride

By April Gocha / March 23, 2017

By processing samples of silicon nitride under high pressure and heat, researchers at the Deutsches Elektronen-Synchrotron have converted an originally opaque hexagonal crystal structure into optically transparent cubic silicon nitride.

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Visualizing atoms at grain boundaries: Atom probe tomography gets into oxides

By April Gocha / May 2, 2016

Researchers at Colorado School of Mines and the University of Florida are well on their way to solving grain boundaries’ secrets—the team recently achieved unprecedented atom-by-atom visualization of the chemical composition of grain boundaries.

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Sintering spinel: NRL scientists fabricate unique shapes with special ceramic

By April Gocha / May 28, 2015

U.S. Naval Research Lab scientists have perfected a sintering technique that can not only produce harder spinel, but also larger pieces and those with challenging shapes—all thanks to a deconstruction of the science behind the process.

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Making silicon slicing more efficient

By / August 7, 2009

When you are in the solar cell business (polycrystalline silicon) or semiconductor business (monocrystalline), silicon ingots and boules – the source of your vital wafers – can be a considerable expense. The knack is to get as many wafers as possible out of each ingot or boule. But, many companies involved with wafer production get…

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Ceramics as alternative to conventional laser generation

By / January 15, 2009

Kudos to Akio Ikesue and Yan Lin Aung for their recent article in Nature Photonics. Ikesue (bias confession: he is an ACerS member) and Yan report on recent developments in the field. From their summary: The opaque and translucent cement and clay often used in tableware are not appropriate for optical applications because of the…

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