## Abstract

The microwave dielectric properties and microstructures of (1 - y)Ca_{1-x}Nd_{2x/3}TiO_{3-y}Li_{1/2}Nd_{1/2 }TiO_{3} ceramics, prepared by a mixed oxide route, have been investigated. A maximum quality factor Q × f = 8600GHz (where f is the resonant frequency) was achieved for samples with y = 0 and x = 0.39, although the dielectric properties varied with sintering temperature. The Q × f value of (1 - y)Ca_{1-x}Nd_{2x/3}TiO_{3-y}Li_{1/2}Nd_{1/2 }TiO_{3} increased up to 1400°C, after which it decreased. The decrease in dielectric properties was coincident with the onset of rapid grain growth. In the (1 - y)Ca_{1-x}Nd_{2x/3}TiO_{3-y}Li_{1/2}Nd_{1/2 }TiO_{3} system, as y increased, the temperature coefficient of resonant frequency (τ_{f}) decreased from 800 to 8 ppm/ °C for y = 0.52 (x = 0.39). However, the optimum combination of microwave dielectric properties was achieved at 1400°C for samples where y = 0.45 (x = 0.39) with a dielectric constant ε_{r} of 101, a Q × f value of 5300 (at 7.2 GHz) and a τ_{f} value of +13ppm/°C.

Original language | English |
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Pages (from-to) | 5650-5653 |

Number of pages | 4 |

Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |

Volume | 41 |

Issue number | 9 |

Publication status | Published - 2002 Sep 1 |

## All Science Journal Classification (ASJC) codes

- Engineering(all)
- Physics and Astronomy(all)