Model Analysis of Phase Transformation on Gadolinium-doped Yttrium Iron Garnet

Abstract

The most suitable model to describe the yttrium iron garnet (YIG) sintering reaction has been evaluated in this study. The sintering reaction at the optimum temperature was predicted by the simulation method. When sintering takes place at a temperature of 1200°C, an intermediate compound of YIP is formed, then at a temperature of 1450°C the formation of YIG reaches a steady state. Sintering at 1450°C for 5 hours resulted in a YIG conversion of about 99.7%. The calculation of the activation energy value of the YIG sintering reaction was carried out based on linear regression technique using the Arrhenius plot. SCM modeling has a deviation tolerance of 0.923 and describes a two-step reaction. The SCM modeling was rated the best compared to other models, and was suitable for describing the true Gd-doped YIG sintering reaction. SCM modeling is considered to be able to describe the actual conditions of the YIG and Gd doped YIG sintering reaction.