Influence of B2O3 on microstructure and microwave dielectric properties of 0.4Nd(Mg0.4Zn0.1Sn0.5)O3–0.6Ca0.8Sr0.2TiO3 ceramic system

2012 ◽  
Vol 73 (10) ◽  
pp. 1240-1244 ◽  
Author(s):  
Yih-Chien Chen ◽  
Shi-Li Yao
Keyword(s):  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Ceramic System ◽  
Microwave Dielectric

Microwave Dielectric Properties of (Ca0.8Sr0.2)x(Li0.5Nd0.5)1-xTiO3 Ceramics

2015 ◽  
Vol 1095 ◽  
pp. 583-589
Author(s):  
Yun Yang ◽  
Chang Lai Yuan ◽  
Guo Hua Chen ◽  
Fu Wei Peng ◽  
Tao Yang
Keyword(s):  
Solid Solution ◽  
Dielectric Properties ◽  
Unit Cell Volume ◽  
Composition Range ◽  
Sintering Temperature ◽  
Microwave Dielectric Properties ◽  
Practical Application ◽  
Ceramic System ◽  
Microwave Dielectric ◽  
Orthorhombic Perovskite

Microwave dielectric properties and microstructures have been investigated in the x Ca0.8Sr0.2TiO3 − (1−x) Li0.5Nd0.5TiO3 ceramic system. In the entire composition range, a single solid solution in the ceramic system was formed with the orthorhombic perovskite structure. As the Ca0.8Sr0.2TiO3 content of the ceramic system increased from 0.1 to 0.3, the dielectric constant (εr) increased from 114 to 144, the product (Qf) of quality factor (Q) and frequency (f) from 995 to 1,121 GHz, and the temperature coefficient of resonant frequency (τf) value from-83 to 94 ppm/°C, respectively. Simultaneously, the observed polarizabilities and the theoretical polarizability increased with rise in the Ca0.8Sr0.2TiO3 content. The τf value increased linearly with the increasing unit-cell volume. For practical application, a near-zero τf in the 0.2Ca0.8Sr0.2TiO3 −0.8Li0.5Nd0.5TiO3 ceramic with a Qf value of 1,025 GHz and a εr value of 132 were obtained at the sintering temperature of 1300°C for 4 h.

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