Abstract: Disclosed is a positive electrode material for a lithium secondary battery. The positive electrode material includes a positive electrode active material formed of Li—[Mn—Ti]-M-O-based material including a transition metal (M) to enable reversible intercalation and deintercalation of lithium and molybdenum oxide. The positive electrode active material is coated with the molybdenum oxide to form a coating layer on a surface thereof.

Abstract: A system for processing a wafer may use a wafer identification (ID) assigned by a wafer manufacturing company as an ID code of the wafer in managing the wafer by a semiconductor manufacturing company.

Abstract: The present disclosure relates to a method for treating and recycling, in an environment-friendly manner, sludge and waste water generated in a process for crushing waste concrete and recycling waste concrete into aggregates. Sand is separated from sludge configured from cement components and sand components and is recycled as fine aggregates, and the cement components can be used as concrete admixtures. Furthermore, the present invention introduces a mineral carbonation technique and thereby allows pH of waste water to satisfy an environmental standard and allows high value calcium carbonate to be produced.

Abstract: A system for processing a wafer may use a wafer identification (ID) assigned by a wafer manufacturing company as an ID code of the wafer in managing the wafer by a semiconductor manufacturing company.

Abstract: A method for extracting rare earth elements from monazite is disclosed. The method includes milling a mixture of monazite including phosphates and rare earth elements and sodium hydroxides inside a mill containing a plurality of balls to form powder by colliding the mixture into balls with each other, converting the mixture into rare earth hydroxides and sodium phosphates through the reaction occurring in the process of repeated collision, and extracting rare earth elements from the powder.

Abstract: A method for extracting rare earth elements from monazite is disclosed. The method includes milling a mixture of monazite including phosphates and rare earth elements and sodium hydroxides inside a mill containing a plurality of balls to form powder by colliding the mixture into balls with each other, converting the mixture into rare earth hydroxides and sodium phosphates through the reaction occurring in the process of repeated collision, and extracting rare earth elements from the powder.