Process Technology of High Thermal Conductive and Electrical Insulating AlN Powder

• Main Authors: Li-Ching Chen, 陳麗卿
• Other Authors: Teh-Hua Tsai
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/3r6vr4

碩士 === 國立臺北科技大學 === 化學工程研究所 === 102 === In this study, using the high temperature oxidation at a temperature of 750℃, 850℃, 950℃, 1050℃ and 1150℃, passing the oxygen flow into the aluminum nitride powder stably and keeping the temperature for 1 ~ 8 h, so that the alumina layer form on the surface of the aluminum nitride powder to resist hydrolysis. The study found that the aluminum nitride powder will show their best performance of hydrolysis resistance by holding the temperature at 1050℃ for 4 hours through the oxygen temperature oxidation. The study of aluminum nitride powder, using the dry pressing, the tape casting and the wet molding method to get the green-body, sintering under the conditions of keeping the temperature at 1800 and 1850℃ for 3 hours, measuring the sintered density and the thermal conductivity of the sintered aluminum nitride. The experimental results showed that the average sintered density of dry pressing, wet molding and tape casting would have the highest value of 3.33 g/cm3, 3.26 g/cm3 and 3.24 g/cm3, respectively. The thermal conductivity of 1850℃ sintered test pieces obtained by wet molding up to 197.40 W/m?K. The study conducts the mechanical strength test of the specimens of sintered parts by using the wet molding method to make the three-point bending test specimens under the best condition of anti-hydrolysis, and gets the best average breaking strength of 298.11 MPa.