Precursor sol of aluminum oxide and method for manufacturing the same, method for manufacturing optical member, optical member, and optical system
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United States of America Patent
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May 31, 2016
Grant Date -
Oct 3, 2013
app pub date -
Mar 14, 2013
filing date -
Mar 29, 2012
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Abstract
A precursor sol of aluminum oxide includes particles containing a hydrolysate and/or a condensate of an aluminum compound, a solvent, and an organo aluminum compound. When a pulsed-NMR T2 relaxation curve of nuclide 1H of the precursor sol of aluminum oxide includes two components with different T2 relaxation times and the component with the longer T2 relaxation time has an abundance level of CL (%) and the component with the shorter T2 relaxation time has an abundance level of CS (%), the relative proportion RCS (%) defined by [{CS/(CS+CL)}×100] is in the range of 23.5% to 50.0%, both inclusive.
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