MnTeMoO6 에서 MoO3 잉여 첨가가 결정 및 미세구조에 미치는 영향

초록

This study investigates the effects of MoO₃ excess on the crystal structure and microstructure of MnTeMoO6 (MTMO), a candidate ULTCC material for high-frequency devices. MTMO powders were prepared by solid-state reaction with 0.5, 1.0, and 2.0mol% MoO₃ additions and sintered at 700°C. X-ray diffraction confirmed a single orthorhombic phase across all samples without secondary phases. SEM analysis suggested excess MoO₃ could modify the chemistry of interface liquids, reduce grain shape anisotropy, and regulate grain growth. This reduction in anisotropy is attributed to increased atomically disordered interfaces and a lowered critical driving force for grain growth, consistent with the predictions of two-dimensional nucleation and growth theory. The findings demonstrate that controlled MoO₃ addition enables microstructure tuning, improving process compatibility and performance for ULTCC applications.

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