Rare earth garmet sintered compact
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United States of America Patent
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Aug 7, 2007
Grant Date -
Sep 29, 2005
app pub date -
Jan 27, 2003
filing date -
Jan 27, 2003
priority date (Note) -
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Abstract
A rare earth garnet sintered compact which is produced by subjecting a rare earth garnet powder such as YAG to a pre-sintering, sintering the pre-sintered product by HIP, and annealing the sintered product at 1100.degree. C. to 1600.degree. C. in a whole oxygen atmosphere under a whole pressure of 4.5 MPa or more, and has an average crystallite diameter of 0.9 to 9 .mu.m, an optical loss coefficient of 0.002 cm.sup.-1 or less and a strain of a transmitted wave of 0.05 .lamda. cm.sup.-1 or less.
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