Cu²⁺-Ion-Substitution-Driven Microstructure and Microwave Dielectric Properties of Mg_1-xCu_xAl₂O₄ Ceramics.

ABSTRACT: In this work, Cu-substituted MgAl₂O₄ ceramics were prepared via solid-state reaction. The crystal structure, cation distribution, and microwave dielectric properties of Mg_1-xCu_xAl₂O₄ ceramics were investigated. Cu²⁺ entered the MgAl₂O₄ lattice and formed a spinel structure. The substitution of Cu²⁺ ions for Mg²⁺ ions contributed to Al³⁺ ions preferential occupation of the octahedron and changed the degree of inversion. The quality factor (Qf) value, which is correlated with the degree of inversion, increased to a maximum value at x = 0.04 and then decreased. Ionic polarizability and relative density affected the dielectric constant (ε

SUBMITTER: Lai Y 

PROVIDER: S-EPMC9565854 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature