نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 کارشناسی ارشد، دانشکده مهندسی مواد، دانشگاه بینالمللی امام خمینی، قزوین، قزوین، ایران
2 دانشیار، پژوهشکده سرامیک، پژوهشگاه مواد و انرژی، کرج، ایران
3 استادیار، دانشکده مهندسی مواد و متالورژی، دانشگاه سمنان، سمنان، سمنان، ایران
4 استادیار، گروه مهندسی مواد، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، تهران، ایران
5 استادیار، گروه مهندسی مواد، دانشگاه امام حسین، تهران، تهران، ایران
چکیده
در این پژوهش، تیتانات زیرکونات سرب (PZT) و تیتانات زیرکونات سرب آلاییدهشده با اکسید نیوبیم (PZTN) به روش حالت جامد دومرحلهای تهیه شدند. ابتدا تیتانات زیرکونیم (ZT) در دمای 1450 درجه سلسیوس به مدت 4 ساعت تهیه شد. در مرحله بعد، PZT با استفاده از تکلیس مقدار مناسبی از اکسید سرب (PbO) و ZT سنتز شد. تکلیس مخلوط PbO و ZT در دمای 850 درجه سلسیوس انجام شد. PZT تهیهشده با درصدهای گوناگون 02/0، 05/0 و 12/0 درصد مولی از نیوبیم آلاییده شد. قرصهای تهیهشده از پودرهای PZT و PZTN در دمای 1300 درجه سلسیوس تفجوشی شدند. خواص الکتریکی نمونهها در بسامد یک کیلوهرتز بررسی شد. نتایج نشان داد، با افزایش غلظت نیوبیم تا مقدار 05/0 درصد مولی در نمونههای PZTN، d33، ثابت دیالکتریک نسبی، و فاکتور اتلاف دیالکتریکی افزایش مییابند و با افزودن مقادیر بیشتر تا 12/0 درصد مولی، مقادیر این خواص کاهش مییابند. مقادیر خواص ذکرشده در نمونه آلاییدهشده با 05/0 مولی بهترتیب برابر (pC/N)360، 1400 و 4/2 بهدست آمد.
کلیدواژهها
- تیتانات زیرکونات سرب
- سنتز حالت جامد دومرحلهای
- تیتانات زیرکونات سرب آلاییدهشده با نیوبیم
- خواص الکتریکی
موضوعات
عنوان مقاله [English]
Synthesis of PZT by Two-Step Solid State Reaction and Evaluation of the Effect of Nb2O5 Doping on Its Electrical Properties
نویسندگان [English]
- Mahya Sadat Hoseini 1
- Alireza Aghaei 2
- Reza Irankhah 3
- Azam Moosavi Kashi 4
- Reza Tabarzadi 5
1 M. Sc., Faculty of Material Engineering, Imam Khomeini International University, Ghazvin, Ghazvin, Iran
2 Associate Professor, Department of Ceramic, Materials and Energy Research Center, Karaj, Iran
3 Assistant Professor, Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Semnan, Iran
4 Assistant Professor, Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Tehran, Iran
5 Assistant Professor, Department of Materials Engineering, Imam Hossain University, Tehran, Tehran, Iran
چکیده [English]
Abstract In this study, lead zirconate titanate (PZT) and Nb-doped PZT (PZTN) were synthesized by two-step solid-state reaction method. To this end, ZrTiO4 (ZT) was first synthesized at 1450 °C for four hours. In the next step, PZT was synthesized by calcination of appropriate amounts of PbO and ZT. Calcination of (PbO+ZT) was performed at 850 °C. Next, the prepared PZT powder was doped by 0.02, 0.05, and 0.12 mol % of Nb2O5. The cylindrical pellets of the PZT and PZTN powders were sintered at 1300 °C. The electrical properties of PZT and PZTN samples were studied at 1 KHz. The experimental results indicated that upon increasing the amount of Nb up to 0.05 mol % in the PZTN samples, the piezoelectric charge coefficient (d33), relative dielectric constant (εr), and dissipation factor (tanδ) would also increase. However, the increase in the amount of Nb over 0.05 resulted in a negative effect on the electrical properties. The values of the mentioned electrical properties in the 0.05Nb-doped sample were 360 pC/N, 1400, and 2.4, respectively.
کلیدواژهها [English]
- PZT
- Two-Step Solid-State Synthesis
- PZTN
- Electrical Properties
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