| 摘要 |
A dielectric porcelain composition. The conventional MgTiO3 porcelain composition is not suitable material for small-sized electronic parts due to its relatively small dielectric constant ( epsilon r) of 20, while the CaTiO3 porcelain composition is not suitable for electronic parts for high-frequency applications due to its small Q-value. In addition, it is difficult to control these conventional procelain compositions' temperature coefficients of resonance frequency. This invention solves the above-mentioned problems by providing a dielectric porcelain composition expressed by the following chemical formula: xMgTiO3.(1-x)CaTiO3.y(Ln<1>1-wLn<2>w)2Ti2zO3+4z, where, Ln<1> and Ln<2> represent lanthanoid elements and 0 </= w < 1, 0.20 </= x </= 0.80, 0.05 </= y </= 5.0, and 0.25 </= z </= 1.5. This dielectric porcelain composition can be used for resonators, filters, capacitors, etc., used for processing microwave-band signals.
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