Structure and microwave dielectric properties of 5BaO–2V2O5 binary ceramic system

Electronic structure and luminescence assets in white-light emitting Ca2V2O7, Sr2V2O7 and Ba2V2O7 pyro-vanadates: X-ray absorption spectroscopy investigations

“…The rst region is between the 950-800 cm À1 and can be ascribed to the symmetric stretching vibrations of end VO 3 groups. [33][34][35] The second region is from 800 cm À1 to 400 cm À1 and attributed to stretching vibrations of bridging V-O-V band bending vibrations. [33][34][35] The third region contains bands below the 400 cm À1 and may be due to the peripheral modes.…”

Preparation and Microwave Dielectric Properties of Ba3A(V2O7)2 (A = Mg, Zn) Ceramics for ULTCC Applications

“…The bending vibrations of O‐VO 3 group and V–O‐V bridges are observed in the region of 206 to 265 cm –1 . The Raman bands observed below 200 cm –1 can be attributed to the lattice mode vibrations , . The Raman band assignments of Ba 3 A(V 2 O 7 ) 2 (A = Mg, Zn) ceramics are compiled in Table .…”

“…The Raman bands observed below 200 cm -1 can be attributed to the lattice mode vibrations. [43,44] The Raman band assignments of Ba 3 A(V 2 O 7 ) 2 (A = Mg, Zn) ceramics are compiled in Table 1. Table 1.…”

“…There is a renewed interest in vanadium‐based materials owing to their low sintering temperature, good stability, compatibility with metal electrodes etc. Several vanadium based ceramic systems were reported for LTCC applications, such as Ca 5 Co 4 (VO 4 ) 6 , Ba 16 V 18 O 61 , BaTa 2 V 2 O 11 , LiCa 3 ZnV 3 O 12 , LiMgVO 4 , BiVO 4 , 0.45BiVO 4 ‐0.55TiO 2 , Ba 3 (Ti,Zr)V 4 O 15 , Ca 5 Mn 4 (VO 4 ) 6 , Mg 4 V 2 O 9 , BaMg 2 V 2 O 8 etc., . X Jiang et al reported that orthorhombic BaCaV 2 O 7 ceramic sintered at 830 °C shows good microwave dielectric properties with dielectric constant of 8.9, quality factor of 31,362 GHz and temperature coefficient of resonant frequency of –68.2 ppm/°C .…”

Temperature-stable and high Q composite ceramics in low-temperature sinterable BaO–V2O5 binary system

“…[27]. The coexistence of Ba 2 V 2 O 7 and Ba 3 (VO 4 ) 2 in the sintered bodies might be due in large part to the different crystalline structures of two phases and the different coordinational relations between V 5+ , Ba 2+ and O 2À in each crystal structure.…”