Elaboration et caractérisation de céramiques PZT dopé et détermination de la frontière morphotropique: FMP

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

This work has for objective, the synthesis and development, the survey of the dielectric,piezoelectric and mechanical properties of a new material made by ceramics PZT type ofstructure perovskite in the ternary system: (1-x)Pb (Zry Ti1-y)O3-xSm(Fe3+0.5, Nb5+0.5)O3 withx = 2%, 41%≤ y ≤57%.A substitution in site A and B was carried out in order to ameliorate its physicalproperties.The samples chosen for this survey have been prepared by a synthesis method in strongway. The samples have undergoes a sintering with: 1100, 1150, 1180 oC successively, inorder to optimize the temperature of sintering where the density of the sample is maximal(near to the theoretical density) and therefore the product of better physical quality.Different techniques of characterization have been used for this survey as, thediffraction of the X-rays, the scan electronic microscopy (SEM), atomic force microscopic(AFM) and the electric measures.The diagrams of diffraction of the X-rays indicated that the compositions near to theMPB, are located in the range 51≤ y ≤55% and the morphological survey of the differentsamples showed that the ceramics PZT-SFN (55/45) sintered to 1180 oC near to the MPBfavored the growth of the grains.The survey of the dielectric properties of all samples showed a strong dielectric constantfor the two samples 53/47 (εr=13583,036) and 55/45 (εr=13072,59), a lower loss constant1,29 % for the sample 53/47 and 1,258 % for the sample 55/45 supposed to be near themorphotropic phase boundary where coexists the two phases tetragonal (T) and rhombohedral(R).The survey of the piezoelectric properties of the two samples 53/47, 55/45 also showeda maximal value of the planar electromechanical coupling factor (0,63 for the sample 53/47and 0,619 for the sample 55/45). These results are similar to the results found by otherauthors.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0912f416-a335-40de-b3d3-7ac97eee0091

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

291334_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":" Fraes Kahoul","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"A. Boutarfaia","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

French

المصدر والدورية

اسم المصدر

Elaboration et caractérisation de céramiques PZT dopé et détermination de la frontière morphotropique: FMP

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

A. Boutarfaia

الإعداد

Fraes Kahoul

الاقتباسات الببليوغرافية