PRECURSOR SOL OF ALUMINUM OXIDE, METHOD FOR MANUFACTURING THE SAME, METHOD FOR MANUFACTURING OPTICAL MEMBER, OPTICAL MEMBER, AND OPTICAL SYSTEM

PROBLEM TO BE SOLVED: To provide a precursor sol of aluminum oxide in which a tensile stress generating in drying or baking after film formation is relieved and cracks are suppressed even in a thick film, and a method for manufacturing an optical member using the same.SOLUTION: A precursor sol of al...

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Hauptverfasser:	HISAIE KATSUAKI, ABE KEIKO, NAKAYAMA HIROHARU, MAKINO KENJI, HASEGAWA SEI
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS GLASS INORGANIC CHEMISTRY JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC CHEMISTRY PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a precursor sol of aluminum oxide in which a tensile stress generating in drying or baking after film formation is relieved and cracks are suppressed even in a thick film, and a method for manufacturing an optical member using the same.SOLUTION: A precursor sol of aluminum oxide includes particles containing a hydrolysate and/or a condensate of an aluminum compound, a solvent, and an organoaluminum compound. When a pulsed-NMR Trelaxation curve of the nuclideH of the precursor sol of aluminum oxide is divided into two components of the relaxation curve with a different Trelaxation time and the component of the relaxation curve with a longer Trelaxation time has an abundance level of C(%) and the component of the relaxation curve with a shorter Trelaxation time has an abundance level of C(%), the Rdefined by R(%)=(C/(C+C))×100, is 23.5% or more and 50.0% or less.