Low Temperature Sintering and Microwave Dielectric Properties of Ba₂Ti₉O₂₀Ceramics with 3ZnO–B₂O₃Addition

Abstract

Boron and zinc oxide (ZnBO) glass added in dielectric materials have drawn a great attention recently due to the low firing temperature. Microwave dielectric properties of the Ba 2 Ti 9 O 20 -based ceramics with ZnBO addition up to 3 wt% were investigated at the sintering temperatures ranging from 900 to 960 C. Effects of the ZnBO addition on the bulk density, microstructure, and dielectric properties of the Ba 2 Ti 9 O 20 -based ceramics at microwave frequency were elucidated. X-ray diffraction (XRD) results show the presence of five crystalline phases, in the sintered ceramics, depending upon the amount of ZnBO addition. Optimum dielectric properties were obtained for the Ba 2 Ti 9 O 20 -based ceramic with 1 wt% ZnBO addition and sintered in air at 940 C for 2 h, having the dielectric properties: Q ¼ 1137 (Q Â f ¼ 8300), " r value ¼ 27:3, and f ¼ 2:5 ppm/ C.

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

“…The pure Ba 2 Ti 9 O 20 phase was obtained at the low temperature of 900 • C because the eutectic reaction could increase the volume of liquid phase and accelerate the migration of reactant species through the liquid phase formed between the grains in the pellet. Lee et al reported that pure Ba 2 Ti 9 O 20 was obtained by use 3ZnO-B 2 O 3 [12]. B 2 O 3 was dissolved in acetic acid to formed solution at first, and then added it to Ba-Ti-solution.…”

IR and Raman investigation on the structure of (100-x)[0.33B2O3–0.67ZnO]–xV2O5 glasses

“…The glass from the ZnO-B 2 O 3 system is a material with low melting point, and has already had many important applications as a good sintering agent in LTCC technique [1][2][3]. According to our recent work, the addition of V 2 O 5 to ZnO-B 2 O 3 glasses can significantly improve the sintering behavior of the glass, which could be of great interest in industry application.…”

“…Reni Iordanova et al [4] studied the structure of B 2 O 3 -V 2 O 5 glasses by IR spectroscopy. They found that the glasses rich in V 2 in particular, the structure of the glass with low V 2 O 5 content has never been reported.…”

Study on low temperature sintering and microwave dielectric properties of Ba2Ti9O20-based ceramics

“…In a previous study, 14) we have investigated the microwave dielectric properties of the Ba2Ti9O20 ceramics with different addition amounts of 3 ZnO-B2O3 (ZnBO). The results indicate that the addition of ZnBO in the Ba2Ti9O20-based ceramics can effectively lower the sintering temperature to ~940°C, and increases the apparent density and dielectric constant of the sintered ceramics.…”