Dielectric Properties of (PbCa)(MeNb)O3 at Microwave Frequencies
Dielectric Properties of (PbCa)(MeNb)O3 at Microwave Frequencies
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DOI：
10.1143/jjap.31.3144
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发表时间：
1992-09
影响因子：
1.5
通讯作者：
J. Kato;Hiroshi Kagata Hiroshi Kagata-Hiroshi-Kagata;Keiji Nishimoto Keiji Nishimoto-Keiji-Nishimoto
中科院分区：
文献类型：
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作者：
J. Kato;Hiroshi Kagata Hiroshi Kagata-Hiroshi-Kagata;Keiji Nishimoto Keiji Nishimoto-Keiji-Nishimoto
研究了（Pb_（1-x）Cax）-（MemNb_（1-m））O_3陶瓷的微波介电性能，其中Me选自Li，Na，Mg，Zn，Ni，Co，Fe，Y，Yb，Al和Cr。在具有钙钛矿结构的（PbCa）（Mg_（1/3）Nb_（2/3））O_3、（PbCa）（Ni_（1/3）Nb_（2/3））O_3和（PbCa）-（Fe_（1/2）Nb_（1/2））O_3中获得了高的Q值和小的谐振频率温度系数。这些介电常数和近零温度系数的Q值分别为εr=73（Q=1330）、εr=59（Q=1700）和εr=91（Q=1650）。具有较少量钙钛矿相的其它陶瓷具有退化的特性，即，低Q值或大温度系数。在铅和钙基钙钛矿中，似乎由于A位中的Pb含量和B位中较小的平均离子半径而发生高介电常数。
We have investigated the dielectric properties up to microwave frequencies of ceramics represented as (Pb1-xCax)-(MemNb1-m)O3 where Me is selected from Li, Na, Mg, Zn, Ni, Co, Fe, Y, Yb, Al and Cr. High Q values and small temperature coefficients of resonant frequency were obtained in (PbCa)(Mg1/3Nb2/3)O3, (PbCa)(Ni1/3Nb2/3)O3 and (PbCa)-(Fe1/2Nb1/2)O3 with perovskite structure. These dielectric constants and the Q values for a near-zero temperature coefficient are εr=73 with Q=1330, εr=59 with Q=1700 and εr=91 with Q=1650, respectively. The other ceramics with smaller amounts of perovskite phase had degraded characteristics, i.e., low Q values or large temperature coefficients. In lead- and calcium-based perovskite, it seems that the high dielectric constant occurs due to Pb content in A-sites and smaller average ion radius in B-sites.