JPH0436115B

PURPOSE:To obtain the titled sintered mullite having crystal particle diameter larger than a specific level, containing mullite phase as a main crystal phase and having excellent creep resistance at high temperature, thermal stability, etc., by forming a powdery raw material containing Al2O3, SiO2 a...

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Bibliographic Details
Main Authors OONISHI KOJI, TOMATSU HIROSHI, KAWANAMI TOSHIO, MAEDA KATSUMI
Format Patent
LanguageEnglish
Published 15.06.1992
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:PURPOSE:To obtain the titled sintered mullite having crystal particle diameter larger than a specific level, containing mullite phase as a main crystal phase and having excellent creep resistance at high temperature, thermal stability, etc., by forming a powdery raw material containing Al2O3, SiO2 and TiO2 at specific weight ratios and calcining the formed product. CONSTITUTION:A powdery raw material having an Al2O3/SiO2 weight ratio of 73/27-78/22 and containing 0.02-5pts.wt. of TiO2 based on 100pts.wt. of the sum of Al2O3 and SiO2 is prepared beforehand. The powdery raw material is formed and calcined to obtain a heat-resistant sintered mullite having a crystal particle diameter of >=2mum and containing mullite phase as main crystal phase. Since the obtained sintered mullite has excellent creep resistance and stability at high temperature, high-temperature strength, etc., it can be suitably used as a roller and jig for high-temperature use, a furnace core tube, a protection tube, etc.
Bibliography:Application Number: JP19870102349