Dielectric Characteristics of (A1/21+·A1/23+)TiO3 Ceramics at Microwave Frequencies
Dielectric Characteristics of (A1/21+·A1/23+)TiO3 Ceramics at Microwave Frequencies
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DOI：
10.1143/jjap.30.2339
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发表时间：
1991-09
影响因子：
1.5
通讯作者：
Hisakazu Takahashi;Y. Baba;K. Ezaki;Y. Okamoto;K. Shibata;Kazuhiko Kuroki Kazuhiko Kuroki-Kazuhiko-Kuroki;Shoichi Nakano Shoichi Nakano-Shoichi-Nakano
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文献类型：
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作者：
Hisakazu Takahashi;Y. Baba;K. Ezaki;Y. Okamoto;K. Shibata;Kazuhiko Kuroki Kazuhiko Kuroki-Kazuhiko-Kuroki;Shoichi Nakano Shoichi Nakano-Shoichi-Nakano
我们用公式（A1/21+·A1/23+）TiO3研究了钙钛矿在微波频率下的介电特性（其中A1+表示从锂到钾系列的碱金属，A3+表示从镧到镥的镧系元素）。首次发现，当Li1+取代在A1+位时，取代在A3+位的元素离子半径越大，介电常数越高，谐振频率温度系数负移越大。当x=0.4时，（1-x）（Li1/21+·Sm1/23+）TiO3-x(Na1/21+·Sm1/23+)TiO3体系的介电性能较高，εr=81， Q=2050, τf=+17ppm/°C。
We have investigated the dielectric characteristics at microwave frequencies of perovskites with the formula (A1/21+·A1/23+)TiO3, (where A1+ represents an alkali metal from the lithium to potassium series and A3+ represents a member of the lanthanide series from lanthanum to lutetium). It was found for the first time that in the case of Li1+ substitution at the A1+ site, the larger the ionic radius of the element which substituted at the A3+ site, the higher the dielectric constant was and the greater the negative shift of the temperature coefficient of resonant frequency was. For the (1-x)(Li1/21+·Sm1/23+)TiO3-x(Na1/21+·Sm1/23+)TiO3 system at 3 GHz, high dielectric properties of εr=81, Q=2050 and τf=+17ppm/ °C were obtained when x=0.4.