| Title: |
Dielectric Characteristics of (A1/21+·A1/23+)TiO3Ceramics at Microwave Frequencies |
| Authors: |
Takahashi, Hisakazu, Baba, Yoko, Ezaki, Kenichi, Okamoto, Yasuhiko, Shibata, Kenichi, Kazuhiko Kuroki, Kazuhiko Kuroki, Shoichi Nakano, Shoichi Nakano |
| Source: |
Japanese Journal of Applied Physics; September 1991, Vol. 30 Issue: 9 p2339-2339, 1p |
| Abstract: |
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+)TiO3system at 3 GHz, high dielectric properties of ?r=81, Q=2050 and ?f=+17ppm/ °C were obtained when x=0.4. |
| Database: |
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