The Observation' And Prediction Of Constant Quality Factors Of Lnalo(3) Doped Ba(6-3x)Ln(8) (+) 2xti18o54 (Ln = Nd, Sm, La) Ceramics

Usually, the quality factor of a binary-phase ceramic will increase if the volume molar ratio of the high quality factor component increases, and vice versa. However, the quality factor of the Ba(6-3x)Ln(8 + 2x)Ti(18)O(54) - LnAlO(3) (Ln = Nd, Sm, La) ceramics keeps a constant (similar to 2200 +/- 200 at 4 GHz) as the volume molar ratio of LnAlO(3) (similar to 9000 at 7 GHz) increases. While previous studies reported the importance of microstructure variation, here by fitting the dielectric constant, via definition we derived a quality factor calculation formula that can precisely determine the quality factor as the volume molar ratio changes, which is of great significance for guiding the ceramic manufacturing.