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A new ternary-phase binder system incorporating alumina (Al2O3) precursors was successfully developed through process control to improve the sand mold's strength for casting of large objects. Three types of Al2O3 precursors with different molecular structures, such as Al(OH)3, Al(OEt)3, and Al(NO3)3 were employed in the ternary-phase binder system. A dual-dipping process was developed. The first dipping...
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