Abstract
Mullite (Al₄+2xSi₂-2xO₁₀-x) is a ceramic material with excellent heat resistance and mechanical properties, but its performance can be further enhanced by controlling its crystal orientation. In this study, we focus on the electric field during spark plasma sintering (SPS). Mullite powder (Al₂O₃:SiO₂ = 2:1) was sintered under two conditions: 1400°C (vacuum, 50 MPa) and 1850°C (N₂, 1 MPa, held for 5 min.) X-ray diffraction (XRD) results show that the (001) peak intensity is significantly increased for samples exposed to electric fields, suggesting that dipole The dipole interaction and the local electric field promoted the crystal orientation. These results emphasize the possibility of electric field-assisted orientation of mullite, and future research will focus on optimizing sintering conditions that promote orientation and suppress secondary phases.
https://ror.org/00pjwdc92 
