Microwave dielectric properties of xNd(Zn1/2Ti1/2)O3–(1−x)CaTiO3 ceramics

Effect of bond valence on microwave dielectric properties of (1−x)CaTiO3–x(Li0.5La0.5)TiO3 ceramics

“…Recently, a number of attempts on the modification of microwave dielectric properties of CaTiO 3 [2][3][4][5]. However, the dielectric constants for these new ceramic systems decrease inevitably since those materials with negative t f values usually have the much smaller e r than that of CaTiO 3 ceramics.…”

New high-ɛ and high-Q microwave dielectric ceramics: (1−x)Ca0.61Nd0.26TiO3−xNd(Zn0.5Ti0.5)O3

“…Therefore, to tune the f to zero, some compounds such as CaTiO 3 and SrTiO 3 , with high ε, high Qf-value and large positive f , have been introduced to Ln(B 0.5 Ti 0.5 )O 3 [9][10][11][12]. These investigations show that moderate ε, high Qf-value and near zero f have been obtained in these systems such as Nd(Mg 0.5 Ti 0.5 )O 3 -CaTiO 3 [9], NZT-SrTiO 3 [10] and NZT-CaTiO 3 [11]. In addition, Ca 0.61 Ln 0.26 TiO 3 (Ln = La, Nd, Sm) [13][14], the product of Ca partially substituted by Ln of CaTiO 3 , displays high ε (∼100), high Qf-value (>10,000 GHz) and much lower positive f than that of CaTiO 3 .…”

Low Dielectric Loss and Good Dielectric Thermal Stability of xNd(Zn1/2Ti1/2)O3–(1−x)Ba0.6Sr0.4TiO3 Thin Films Fabricated by Sol–Gel Method

“…Recently, the microwave dielectric properties of Nd(Zn 1/2 Ti 1/2 )O 3 (NZT) perovskite ceramics with very low dielectric loss (Q × f ∼ 170 000 GHz at 9 GHz) have been unveiled . Furthermore, NZT was introduced into CaTiO 3 to form a x Nd(Zn 1/2 Ti 1/2 )O 3 –(1− x )CaTiO 3 solid solution ceramics system, which showed much better microwave dielectric properties . NZT has the similar perovskite structure to BST and its ions size and valence in A and B sites of perovskite structure are different from that of BST.…”

“…17 Furthermore, NZT was introduced into CaTiO 3 to form a xNd(Zn 1/2 Ti 1/2 )O 3 -(1Àx)CaTiO 3 solid solution ceramics system, which showed much better microwave dielectric properties. 18 NZT has the similar perovskite structure to BST and its ions size and valence in A and B sites of perovskite structure are different from that of BST. It is expected that the introduction of NZT into BST would result in a low dielectric loss as well as a better dielectric thermal stability.…”