@Article{RodriguesCasPizCorHer:2016:StOrDi,
               author = "Rodrigues, J. E. F. S. and Castro, Pedro Jos{\'e} de and Pizani, 
                         P. S. and Correr, W. R. and Hernandes, A. C.",
          affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Federal de S{\~a}o 
                         Carlos (UFSCar)} and {Universidade Federal de S{\~a}o Carlos 
                         (UFSCar)} and {Universidade Federal de S{\~a}o Carlos (UFSCar)}",
                title = "Structural ordering and dielectric properties of Ba3CaNb2O9-based 
                         microwave ceramics",
              journal = "Ceramics International",
                 year = "2016",
               volume = "42",
                pages = "18087--18093",
             keywords = "Ba(Ca1/3Nb2/3)O3 1:2 ordered perovskite Cation ordering Microwave 
                         dielectric properties Dielectric resonator.",
             abstract = "Ba3CaNb2O9 is a 1:2 ordered perovskite which presents a trigonal 
                         cell within the D3d3 space group. Dense ceramics of Ba3CaNb2O9 
                         were prepared by the solid-state reaction route, and their 
                         microwave dielectric features were evaluated as a function of the 
                         sintering time. From Raman spectroscopy, by using grouptheory 
                         calculations, we were able to recognize the coexistence of the 1:1 
                         and 1:2 ordering types in all samples, in which increasing the 
                         sintering time tends to reduce the 1:1 domain, leading to an 
                         enhancement of the unloaded quality factor. We concluded that this 
                         domain acts as a lattice vibration damping, consequently raising 
                         the dielectric loss at microwave frequencies. The best microwave 
                         dielectric parameters were determined in ceramics sintered at 1500 
                         °C for 32h: \ε\′ 43; Qu fr ¼ 15,752 GHz; \τf 
                         278 ppm °C1.",
                 issn = "0272-8842",
             language = "en",
           targetfile = "rodrigues_structural.pdf",
        urlaccessdate = "26 abr. 2024"
}