Abstract: The multiple non-linear regression analysis method was applied to build up the non-linear regression mathematical model y=b₀+Σb_ix_i+Σb_iix_i²+Σb_iiix_i³, and the complex oxides were used as effective dopants to X7R ceramic powders of multilayer ceramic capacitor (MLCC). The non-linear regression equation regarding the relationship between the dosage of different dopants and the dielectric properties was established based on the testing data. Moreover, the modification mechanism of dopants on the characteristics of the ceramics was explained in this paper. The regression equation suggests that with the increase of Nb and Ce addition to BaTiO₃, the dielectric constant decreases, which is consistent with "core-shell" structure theory. According to the multiple regression equation analysis results, the dosage of different dopants was adjusted to develop the environmental friendly X7R MLCC ceramics. The main features of the BaTiO₃ ceramics sintered in air atmosphere at 1140℃ are ε_298K=2900±50, tgδ≤1.0%,ρ≥10¹¹Ω·cm,Δ C/C _25℃(-55℃～+125℃)≤±15%.

Key words: X7R, MLCC, non-linear regression multi-analysis, barium titanate