Product Code: ICAL09_1401

Temperature Field Simulation of Functional Ceramics during CO2 Laser Sintering
Authors:
Xinyu Du, Beijing University of Technology; Beijing Peoples Republic of China
Lingfel Ji, -; -
Yijian Jiang, -; -
Presented at ICALEO 2009

The functional ceramics of Ta2O5, Ba0.5Sr1.5Na0.6K0.4Nb5O15 (BSKNN) and Sr1.86Ca0.14NaNb5O15 (SCNN) have been prepared successfully by CO2 laser sintering. The physical properties of these laser sintered ceramics are improved comparing to the traditional furnace sintered ceramics. In the present work, a finite-element model is developed to explore the process of laser sintering and the mechanism of property improvement by analyzing the temperature field of functional ceramics during laser sintering. The results of the model were confirmed by temperature measurements and examined by experiment. The model allows for the non-linear behavior of thermal conductivity and of specific heat due to temperature changes. The simulation results show the characteristics of the temperature field of functional ceramics during laser sintering, which can be used for analyzing the key factors of obtaining good quality and high performance ceramics by laser sintering.