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Highly Transparent Pure Alumina Fabricated by High-Pressure Spark Plasma Sintering

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Highly transparent pure alumina with an average grain size of 200 nm was fabricated by means of high-pressure spark plasma sintering. The alumina sintered either at 950° or at 1000°C for 10 min under an applied pressure of 500 MPa had an in-line transmission of about 64% for a wavelength of 645 nm. The application of high pressure allowed to obtain highly transparent full dense alumina at low temperatures with no considerable grain growth.
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Document Type: Research Article

Affiliations: 1: World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitronics (MANA) and Nano Ceramics Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan 2: Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy

Publication date: 2010-09-01

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