【正文】 lectric circuits: Physical separation of conductors and the regulation or prevention of current flow between them。 A tail in the distribution indicates a large distribution of relaxation time。2 )( eee ?= rrsC 039。39。39。39。 tPEP drrsd = ? eeet?Relaxation Effects amp。 介電損耗的數(shù)學(xué)描述 E=E0exp(iwt) () D=D0exp[i(wtd)] () 利用 D=k*E，得 k*=ksexp(id)=ks(condisind) () 其中， ks 靜態(tài)介電常數(shù) (=D0/E0) 介電損耗 (Dielectric Loss) 利用復(fù)介電常數(shù)的概念 k*=k’ik‖=e*/e0=(e’ie‖)/e0 () k’=kscosd () k‖=kssind () tand=k‖/k’=e‖/e’ () tand即為介電損耗 [物理意義 ] 極化過程中消耗的能量與儲(chǔ)存的能量的比值 電介質(zhì)的品質(zhì)因數(shù)： Q=1/ tand Resonance Effects In the case of atomic and ionic polarization, the electrons and ions behave, to a first approximation, as though bound to equilibrium positions by linear springs so that the restoring force is proportional to displacement, a damping factor g is included in the equation of motion. () Solving () and ignoring the transient term yields () Since –ex(t) is the induced dipole moment per atom, the plex polarization P* is given by () )e x p (00 2 tjQExmxmxm wwg =?? ???}){()ex p ()(2200gwjmtjeEtx?=)()(* txeNP =Resonance Effects And () So that () By equating real and imaginary parts () () The above the contributions of ionic and electronic polarization, which are sensibly independent of temperature, the resonance curves are also. })( 1{ 22002*gec jmNee?=?gee jmNer ??=? )(1122002*})({1 2222202200239。 as Space Charge or Diffusional Polarization 電位移 D、 電場強(qiáng)度 E與極化強(qiáng)度 P的關(guān)系 For case a): E=s/e0 () s surface charge density For case b): E=(sTsP)/e0 () sT – total surface charge density。 mj=average dipole moment) mj= aj E’ () aj polarizability of average dipole moment。 Metallurgy, The University of Tokyo in 1991 ? Research Scientist at Yokohama Ramp。Electronic Ceramics and Their Applications . Chen (陳湘明 ) Department of Materials Science amp。 Eng., Central South University in 1981 ? PhD Dept. Mater. Sci. amp。 功能陶瓷的學(xué)科關(guān)系 學(xué)科基礎(chǔ)： 固體物理、固體化學(xué)、電磁學(xué)、材料科學(xué)基礎(chǔ) 相關(guān)學(xué)科： 電子、通訊、儀器儀表等 無機(jī)非金屬材料 功能材料 功能陶瓷 功能陶瓷 — 現(xiàn)代電子技術(shù)的 三 大物質(zhì)基礎(chǔ)之一 半導(dǎo)體材料 電介質(zhì)材料 (功能陶瓷 ) 光電子材料 微電子學(xué) 固體電子學(xué) 光電子學(xué) 電子材料 Primary Contents Elements of Dielectrics (電介質(zhì) ) and Ceramic Insulators Ferroelectric(鐵電 ), Relaxor Ferroelectric(馳豫鐵電 ), Antiferroelectric (反鐵電 ) Ceramics and Ceramic Capacitors(電容器 ) Microwave Dielectric Ceramics(微波介質(zhì)陶瓷 ) Piezoelectric(壓電 ) and Optoelectric Ceramics Ceramic Sensors ZnO Varistors(變阻器 ) Conducting Ceramics Chapter 1 Elements of Dielectrics and Ceramic Insulators I. Elements of Di