Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 28, No. 4 (April 2015) 561-566   

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  ETHANOL-BASED TAPE CASTING PROCESS OF THE TEXTURED BI0.5(NA0.80K0.20)0.5TIO3-BIFEO3 CERAMICS
 
A. Moosavi, M. Bahrevar and A. Aghaei
 
( Received: April 29, 2014 – Accepted: December 18, 2014 )
 
 

Abstract    The rheological and tape casting behavior of ethanol-based Bi0.5(Na0.80K0.20)0.5TiO3-7 mol% BiFeO3 (BNKT-BF) slurries was investigated. The effect of sintering temperature profile on texture development with a preferred <001> orientation was also studied. A 50 MPa pressure assisted three step sintering profile promoted extensive texture development together with densification. The role of BF as a sintering promoter has been discussed.

 

Keywords    Texture, BNKT, Sintering, BiFeO3, Slurry

 

چکیده    در این پژوهش رفتار رئولوژیکی دوغاب‌های حاوی ذرات پیزوالکتریک بدون سرب بر پایه تیتانات بیسموت سدیم پتاسیم به همراه 7 درصد مولی نانو ذرات فریت بیسموت با فرمول شیمیاییBi0.5(Na0.80K0.20)0.5TiO3-7 mol% BiFeO3 (BNKT-BF) مورد بررسی قرار گرفت. نانو ذرات فریت بیسموت به همراه ذرات BNKT به کمک روش ریخته‌گری نواری به همراه ذرات صفحه‌ای شکل تیتانات بیسموتBi4Ti3O12 (BIT) به عنوان شابلون، برای رسیدن به ریزساختار بافت‌دار استفاده شدند. ریزساختار بافت‌دار با رشد ترجیحی ذرات، توسط برنامه‌های تف جوشی متقاوتی بررسی و سرانجام با اعمال فشار 50 مگاپاسکال در دمای ◦C 800 و حرارت دهی مجدد در دمایC ◦ 1200 به مدت 10 ساعت ریزساختار بافت‌دار حاصل شد.

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