(1-x)Ba4Sm9.33Ti18O54 -xCa0.61Nd0.26TiO3 microwave dielectric ceramics - Details

author：

Liang, Bingliang (Liang, Bingliang.) ^[1] | Zheng, Xinghua (Zheng, Xinghua.) ^[2] (Scholars：郑兴华) | Ni, Weiqing (Ni, Weiqing.) ^[3] | Zhou, Xiaohong (Zhou, Xiaohong.) ^[4]

Indexed by：

EI Scopus PKU CSCD

Abstract：

Microwave　dielectric　ceramics　of　(1-x)Ba4Sm9.33Ti18O54　-xCa0.61Nd0.26TiO3[(1-x)BST-xCNT]　were　prepared　by　solid　state　reaction.　Effects　of　composition　and　sintering　temperature　on　their　crystal　structure　and　microwave　dielectric　properties　were　investigated.　A　single　new　tungsten　bronze　phase　was　observed　in　the　(1-x)BST-xCNT　ceramics　when　x　2Ti2O7　to　a　perovskite　phase　when　x　&le　0.6;　and　a　single　perovskite　phase　was　formed　eventually.　The　dielectric　constant　e　increased　steadily　with　increasing　x-value,　but　the　quality　factor　Qf　value　increased　first,　and　decreased　rapidly　and　then　increased　sharply.　Optimal　dielectric　properties　were　obtained　for　the　samples　sintered　at　1325-1350°C:　Ε=75,　Qf=8985　GHz,　temperature　coefficient　of　resonant　frequency　τf=-8.2　×　10-6/°C　for　x=0;　Ε=75,　Qf=9　552　GHz,　τf=-14.4　×　10-6/°C　for　x=0.2;　Ε=108.9,　Qf=14919　GHz,　τf=236.2　×　10-6/°C　for　x=1.

Keyword：

Ceramic materials Crystal structure Dielectric materials Dielectric properties Permittivity Perovskite Phase transitions Sintering Solid state reactions

Community：

[ 1 ] [Liang, Bingliang]College of Materials Science and Engineering, Fuzhou University, Fuzhou 350002, China
[ 2 ] [Zheng, Xinghua]College of Materials Science and Engineering, Fuzhou University, Fuzhou 350002, China
[ 3 ] [Ni, Weiqing]College of Materials Science and Engineering, Fuzhou University, Fuzhou 350002, China
[ 4 ] [Zhou, Xiaohong]College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350002, China