서지주요정보
Pb(Fe,Nb)$O_3$ - Pb(Mg,W)$O_3$ 고용체의 상전이에 대한 연구 = The study on the phase transition ofPb(Fe,Nb)$O_3$ - Pb(Mg,W)$O_3$ solid solution
서명 / 저자 Pb(Fe,Nb)$O_3$ - Pb(Mg,W)$O_3$ 고용체의 상전이에 대한 연구 = The study on the phase transition ofPb(Fe,Nb)$O_3$ - Pb(Mg,W)$O_3$ solid solution / 전영진.
저자명 전영진 ; Jeon, Young-Jin
발행사항 [서울 : 한국과학기술원, 1982].
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소장정보

등록번호

4101655

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8225

SMS전송

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초록정보

Certain characteristic features of phase transition observed in many ferroelectric and antiferroelectric compounds and solid solution have attracted special attention. These features include especially the frequently observed broadening of the phase transition and several concomitant phenomena. In this paper, dielectric properties of $(1-x)Pb(Fe_{1/2}Nb_{1/2})O_3ㆍxPb(Mg_{1/2}W_{1/2})O_3$ system are dealt with. Specimen were prepared by the conventional mixed oxide technique. The work described in this paper falls naturally into three parts. The first part describes the identification of composition of x=0.55. The specimen of this composition shows the first order phase transition from the paraelectric phase to the ferroelectric one at -70℃ under atmospheric pressure with decreasing temperature. The next part deals with the effect of thermal shock on diffused phase transition (DPT) behavior of the specimen of x=0.885, 0.890, 0.895. The critical composition between DPT and sharp transition is proved to be at 0.885 < x < 0.890. Specimen of x=0.890 is found to change the transition behavior from sharp to DPT by the thermal shock, while x=0.885, x=0.895 do not change their original dielectric properties by the thermal shock. At the third part the critical stability factor, $ξ_{3c}$ defined by Fritzberg's polarization fluctuation model between the sharp and DPT is determined to be about 2.01x$10^7$ (V/m). The sharp transition occurs for the stability factor $ξ_3>ξ_{3c}$, where the DPT occurs for $ξ_3≥ξ_{3c}$.

서지기타정보

서지기타정보
청구기호 {MMS 8225
형태사항 [ii], 41 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Young-Jin Jeon
지도교수의 한글표기 : 주웅길
지도교수의 영문표기 : Woong-Kil Choo
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 40-41
주제 Phase transformations (Statistical physics)
Ferroelectric crystals.
고용체. --과학기술용어시소러스
상전이. --과학기술용어시소러스
강유전체. --과학기술용어시소러스
반강 유전체. --과학기술용어시소러스
Antiferroelectrics.
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