Calcium oxide-based ceramic core and preparation method thereof
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United States of America Patent
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Apr 12, 2016
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Aug 27, 2015
app pub date -
May 31, 2013
filing date -
Oct 25, 2012
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Abstract
This invention publishes a method to prepare CaO-based ceramic cores used in investment casting applications. This method claims to use the rare earth oxide to coat the CaO core surface; later the coated cores are shaped then sintered to get the final products. CaO based core was made by 5˜15 wt % plasticizer, 0.001˜20 wt % mineralizer and the rare earth-coated CaO powders to balance for total 100%. This preparation method can solve the CaO core water absorption problems during core manufacturing, shipping and storage process while improve the core chemical inertness and mechanical properties.
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