کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10629341 | 991060 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sintering and piezoelectric properties of K0.5Na0.5NbO3 glass microspheres
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Laser-fused K0.5Na0.5NbO3 (KNN) powder of 75% transparent fraction has been sintered by pressureless sintering, spark plasma sintering (SPS), and hot isostatic pressing (HIP). The laser-fused KNN has a fictive temperature of 503 °C and an onset crystallization temperature of around 529 °C. The results have shown that sintering of the laser-fused KNN powder utilizing the viscous flow of the transparent microspheres (amorphous content)-at the kinetic window (26 °C)-is possible. The highest yield relative density is around 83% at a sintering temperature of 525 °C and at a sintering pressure of 280 MPa. Limited density has been reached because of formation of crystalline surface layers around the amorphous areas. The samples hipped at 525 °C have low piezoelectric coefficient d33 of 5 pC/N because of the residual porosity that led to early dielectric breakdown during the polarization. The sintering behavior, the resulting microstructure as well as the measured properties will be discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 35, Issue 15, December 2015, Pages 4143-4151
Journal: Journal of the European Ceramic Society - Volume 35, Issue 15, December 2015, Pages 4143-4151
نویسندگان
Firas J. Hmood, Jens Guenster, Juergen G. Heinrich,