本文選題：微波陶瓷　切入點(diǎn)：Ca0.61NdxTiO3-MgTiO3　出處：《華北理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著現(xiàn)代通訊技術(shù)的快速發(fā)展,中介電常數(shù)、高Q·f值、近于0的諧振頻率溫度系數(shù)的微波材料研制,成為小型化、輕量化電子元器件制備的關(guān)鍵。采用固相法合成了Ca0.61Ndx Ti O3和Ca0.61Ndx Ti O3-Mg Ti O3陶瓷材料。利用電子顯微鏡(SEM)、能譜儀(EDS)和X-射線衍射技術(shù)(XRD)等分析方法,對(duì)材料的顯微結(jié)構(gòu)和物相組成進(jìn)行了分析和表征,通過(guò)網(wǎng)絡(luò)分析儀對(duì)材料的介電性能進(jìn)行了分析。對(duì)Ca0.61Ndx Ti O3-Mg Ti O3進(jìn)行了摻雜改性(復(fù)合Zn Al2O4,摻雜La3+、Nb5+),以調(diào)節(jié)材料的微波性能。結(jié)果表明:對(duì)于不同Nd含量的Ca0.61Ndx Ti O3材料,隨著Nd含量的增加,材料的溫度系數(shù)降低。當(dāng)x=0.36時(shí),材料的溫度系數(shù)最低為104.85ppm/℃。Ca0.61Nd0.36Ti O3與Mg Ti O3復(fù)合后,材料的溫度系數(shù)由104.85ppm/℃降至73ppm/℃,材料的介電性能參數(shù)為:εr=45.3,τf=73ppm/℃,Q·f=35000。Ca0.61Ndx Ti O3-Mg Ti O3材料復(fù)合摻雜Zn Al2O4,La3+,Nb5+后,在材料的介電常數(shù)大于40的前提下,材料的諧振頻率溫度系數(shù)得到了進(jìn)一步的降低,且材料的品質(zhì)因數(shù)得到了進(jìn)一步的提高,當(dāng)Nb5+離子摻雜量為0.01,Zn Al2O4復(fù)合量為0.06時(shí)得到了性能較好的微波介電陶瓷材料,其介電性能為:εr=41,τf=40ppm/℃,Q·f=38219。優(yōu)化燒結(jié)工藝的研究表明,最佳的升溫速率為250℃/h,在最終燒結(jié)溫度下保溫4小時(shí),材料具有良好的綜合性能。
[Abstract]:With the rapid development of modern communication technology, microwave materials with intermediate electric constant, high Q 路f value and temperature coefficient of nearly 0 resonant frequency become miniaturized. Ca0.61Ndx TIO 3 and Ca0.61Ndx TIO 3 mg TIO 3 ceramic materials were synthesized by solid phase method. The Ca0.61Ndx TIO 3 and Ca0.61Ndx TIO 3 mg TIO 3 ceramic materials were analyzed by means of electron microscopy (SEM), energy spectrometer (EDS) and X- ray diffraction (XRD). The microstructure and phase composition of the material were analyzed and characterized. The dielectric properties of Ca0.61Ndx TIO _ 3-Mg TIO _ 3 were analyzed by network analyzer. The doping modification of Ca0.61Ndx TIO _ 3-Mg _ 2O _ 3 (composite ZnAl _ 2O _ 4, doped La3 _ Nb5 ~ (5)) was carried out to adjust the microwave properties of the materials. The results showed that: for Ca0.61Ndx TIO _ 3 materials with different ND content, With the increase of ND content, the temperature coefficient of the material decreases. The lowest temperature coefficient of the material is 104.85ppmC 路Ca0.61Nd0.36TiO3, and the temperature coefficient of the material decreases from 104.85ppm / 鈩，

本文編號(hào)：1575080