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Highly Transparent Pure Alumina Fabricated by High‐Pressure Spark Plasma Sintering
Author(s) -
Grasso Salvatore,
Kim ByungNam,
Hu Chunfeng,
Maizza Giovanni,
Sakka Yoshio
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03811.x
Subject(s) - spark plasma sintering , materials science , sintering , high pressure , grain size , plasma , aluminium , wavelength , composite material , metallurgy , optoelectronics , engineering physics , physics , quantum mechanics , engineering
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.