Journal
CHEMISTRY OF MATERIALS
Volume 27, Issue 2, Pages 508-514Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm5037106
Keywords
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Funding
- ANR [ANR-12-JS08-0002]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
- Agence Nationale de la Recherche (ANR) [ANR-12-JS08-0002] Funding Source: Agence Nationale de la Recherche (ANR)
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Transparent polycrystalline ceramics present significant economical and functional advantages over single crystal materials for optical, communication, and laser technologies. To date, transparency in these ceramics is ensured either by an optical isotropy (i.e., cubic symmetry) or a nanometric crystallite size, and the main challenge remains to eliminate porosity through complex high pressurehigh temperature synthesis. Here we introduce a new concept to achieve ultimate transparency reaching the theoretical limit. We use a controlled degree of chemical disorder in the structure to obtain optical isotropy at the micrometer length scale. This approach can be applied in the case of anisotropic structures and micrometer scale crystal size ceramics. We thus report Sr1+x/2Al2+xSi2-xO8 (0 < x <= 0.4) readily scalable polycrystalline ceramics elaborated by full and congruent crystallization from glass. These materials reach 90% transmittance. This innovative method should drive the development of new highly transparent materials with technologically relevant applications.
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