Glass-ceramics, formed via the controlled crystallization of a parent glass, exhibit unique properties. The specific characteristics of glass-ceramics, such as isotropic behavior similar to that of bulk glass, controllable thermal expansion, and heat and chemical resistance, make them suitable for practical applications that cannot be achieved by either glass or crystalline phases alone. Due to these distinctive physical and chemical properties, glassceramics are widely used in household products, 1,2 healthcare materials, and electronic materials, including solid-state electrolytes for all-solid-state batteries. Glass-ceramics have interfaces comprising glassy and crystalline phases, and their influence on physical properties remains unclear.