Author/Authors :
Murai, Kei-ichiro Tokushima University - Faculty of Engineering - Department of Chemical Science and Technology, Japan , Koizumi, Tetsuta Tokushima University - Faculty of Engineering - Department of Chemical Science and Technology, Japan , Shah, Muhamad Faiz Farhan binMohamad Tokushima University - Faculty of Engineering - Department of Chemical Science and Technology, Japan , Abd Rashid, Mohd Warikh bin Universiti Teknikal Malaysia Melaka - Faculty of Manufacturing Engineering, Malaysia , Abd Rashid, Mohd Warikh bin Tokushima University - Faculty of Engineering, TMAC-Tokushima Center, Japan , Moriga, Toshihiro Tokushima University - Faculty of Engineering - Department of Chemical Science and Technology, Japan
Abstract :
In-situ X-ray diffractometry and dilatometry were applied to evaluate substitution effects in Zr2-xTix(WO4)(PO4)2 on negative thermal expansion behavior. The substitution induced a reduction of all the lattice parameter a, b and c and suppressed the coefficient of negative thermal expansion (α= - 2.54×10^-6 K^-1 for x=0 and α= - 1.52×10^-6 K^-1 for x=0.20). However, the coefficients obtained by the dilatometry were larger than those obtained by X-ray diffractometry, maybe due to preferred orientation of grains in the tested bar.
Keywords :
Negative Thermal Expansion , Dilatometry , In , situ High , Temperature X , ray Diffractometry
