Compressive strength was measured by using a WDW3020 testing machine, and cylindrical specimens with a diameter of 20 mm and a height of 20 mm were used. Thermal conductivity at room temperature was measured on 5*5*3 mm
machined specimens, using the Thermal Transport Option (TTO) of Physical Properties Measurement System (PPMS, Model 6000, Quantum Design, United States). Three specimens were used to test properties. Microstructure was observed with a scanning electron microscope (SSX550, Shimadzu, Japan).