一种用(Pb1/2Ni1/2)MnO3改性的PbTiO3压电陶瓷
A NEW PbTiO3 PIEZOELEGTRIC CERAMICS MODIFIED WITH (Pb1/2Ni1/2) MnO3
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摘要: 正 1.引言 由于PbTiO3压电陶瓷较难合成,因而使它的推广应用比PZT陶瓷晚。但是由于它的介电常数小(200左右),居里温度高(490℃),故在高频器件、红外器件等方面有应用前途。目前应用较广的(Ba,Pb)TiO3-PTC陶瓷的转变温度就是利用PbTiO3的高温特性来提高的。 本文介绍的是利用PbTiO3的介电常数小、Kt大和频率稳定度高的特点,把它用作滤
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Abstract: A kind of PbTiO3 piezoelectrie ceramies modified with (Pb1/2 Ni1/2)MnO3 is recommended. It possesses fine VHF performances. Its coupling factor Kt is 0.48; mechanical quality factor QM is high; and frequeney stability is good.With the above mentioned material, We have assembled a 62 MHz band-pass filter which consists of seven vibrators. Its stop-band attenuation reaches 30 dB; insertion loss is 6 dB; the ripple ratio of pass band is 0.5 dB; while the rectangular ratio is 3.4.The depolarization phenomenon appearing in this kind of PbTiO3 ceramics is discussed. It is proposed howto overcome the depolarization phenomenon. And it is thought that this kind of ceramics may be an ideal material for developing PbTiO3 surface wave devices. -
池上清治,上田一朗,永田隆,电子通信学会论文志,55-C(1972), 166.[2]孙宣仁，Pb(Mn,Ti)O3和(Pb, Ba)(Mn,Ti)O3系统的PTC和NTC效应,广州通讯研究所内部资料.[3]上田一朗,小林茂,池上清治,National Tech. Rep., 18(1972),432. -
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