5G communication technology cannot utilize metal backplates (including those with built-in antennas) because metal interferes with signals, preventing devices from achieving nominal speeds. As a result, ceramics have become the preferred alternative. Zirconia ceramics, known for their excellent physical and chemical properties, are widely used across various industrial and technological fields. Using zirconia ceramic as a smartphone backplate is popular due to its outstanding material properties. With its high hardness, it passes drop tests, offers superior texture and color options, and can be crafted into an integrated shell, making it highly favored by users.