HIgh frequency ceramic compact, use thereof, and method of producing the same

摘要

A high frequency ceramic compact includes Al, Ti and Mn as metallic elements and contains substantially no Al2TiO5 phase as determined by X-ray diffraction analysis and is obtained by firing at about 1310C or lower. A preferred high frequency ceramic compact is represented by the following formula and has a Q-value at 10 GHz of 10,000 or more: (100-x-y)AlO3/2-xTiO2-yMnO, wherein x and y are % by mole and x and y satisfy the following conditions: 3.0<=x<=9.0; and 0.1<=y<=1.0. These high frequency ceramic compacts have a relative dielectric constant of 20 or less, a Q-value at 10 GHz of 10,000 or more, and can optionally control the temperature coefficient of resonant frequency around 0 ppm/° C.