The relative density of ALT ceramic composite is much higher than that of pure hot pressed LaTaO3, which indicates that the addition of Al2O3 acts sintering aids.

• ALT陶瓷复合材料的相对密度比烧结纯LiTaO_3陶瓷的高得多,表明Al_2O_3起到烧结助剂的作用。