author = "Nono, Maria do Carmo de Andrade and Castro, Pedro Jos{\'e} de and 
                         Rangel, Elizete Gon{\c{c}}alves Lopes and Mineiro, S{\'e}rgio 
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "ZnO-Nb<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> Dielectric 
                         Resonators and Porosity Influence on Dielectric Constant Values",
              journal = "Materials Science Forum",
                 year = "2015",
               volume = "820",
                pages = "193--198",
                 note = "{Setores de Atividade: Pesquisa e desenvolvimento 
             keywords = "dieletric properties, microwave resonators, porosity, dielectric 
             abstract = "The dielectric resonator (DR) is a ceramic component used in 
                         electronic circuits that can operate in microwave frequency range, 
                         where it plays the role of resonant element and enables the 
                         construction of high selective filters and oscillators. The 
                         dielectric properties of a ceramic resonator are influenced by 
                         their microstructure characteristics as pores amount. This work 
                         shows a study of the influence of pores amount (porosity) on the 
                         dielectric constant values of ceramics from ZnO-Nb2O5-TiO2 system. 
                         Mixtures of Nb2O5, ZnO, and TiO2 powders were compacted by 
                         uniaxial (100 MPa) and isostatic (300 MPa) pressing and sintered 
                         at 1100, 1200, and 1250C. The experimental dielectric constant 
                         values of the sintered ceramics were corrected to eliminate the 
                         porosity influence. The results showed that the porosity, the type 
                         and quantities of crystalline chemical compounds in the ceramics 
                         influence the dielectric constant values.",
                  doi = "10.4028/www.scientific.net/MSF.820.193",
                  url = "http://dx.doi.org/10.4028/www.scientific.net/MSF.820.193",
                 issn = "0255-5476",
                label = "lattes: 9267837198256058 4 NonoCastRangMine:2015:ZnDiRe",
             language = "en",
                  url = "http://www.scientific.net/MSF.820.193",
        urlaccessdate = "05 dez. 2020"