Effects of B2O3 on the phase formation of Ba2Ti9O20 ceramic

BaTi 4 O 9 and B 2 O 3 -doped Ba 2 Ti 9 O 20 ceramics powders have been prepared by a sol-gel route. The phase evolution, grain size and dielectric properties of the BaTi 4 O 9 and Ba 2 Ti 9 O 20 -based ceramics powders have been investigated. These results show that the BaTi 4 O 9 and 5 wt% B 2 O 3 -doped Ba 2 Ti 9 O 20 ceramics powders calcined at 800 • C for 2 h with the grain sizes of 30-80 and 50-200 nm, respectively. Monophase sample of BaTi 4 O 9 with orthorhombic symmetry could be obtained after the BaTi 4 O 9 precursor was calcined at 1200 • C for 2 h, whereas, monophase sample of 5 wt% B 2 O 3 -doped Ba 2 Ti 9 O 20 was obtained at 800 • C for 2 h. The BaTi 4 O 9 and Ba 2 Ti 9 O 20 : 5 wt% B 2 O 3 ceramics fabricated using the sol-gel powders were found to have microwave dielectric properties with ε r = 36.1, Q = 3220 at 5.31 GHz, and ε r = 34.5, Q = 2425 at 5.53 GHz, respectively. The effect of sintering temperatures on the microwave dielectric properties of the Ba 2 Ti 9 O 20 : 5 wt% B 2 O 3 ceramics was studied.

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MICROWAVE DIELECTRIC MATERIALS IN THE BaO–TiO2 SYSTEM

Sebastian¹

2008

Dielectric Materials for Wireless Communication

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Effects of B2O3 on the phase formation of Ba2Ti9O20 ceramic

Cited by 9 publications

References 21 publications

High Temperature Cofired Ceramic (HTCC), Low Temperature Cofired Ceramic (LTCC), and Ultralow Temperature Cofired Ceramic (ULTCC) Materials

High Temperature Cofired Ceramic (HTCC), Low Temperature Cofired Ceramic (LTCC), and Ultralow Temperature Cofired Ceramic (ULTCC) Materials

Microwave Dielectric Properties of Sol-Gel Derived BaTi4O9 and Ba2Ti9O20:B2O3 Ceramics

MICROWAVE DIELECTRIC MATERIALS IN THE BaO–TiO2 SYSTEM

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