کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7744597 | 1498228 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrical conductivity of polycrystalline hydroxyapatite and its application to electret formation
ترجمه فارسی عنوان
هدایت الکتریکی هیدروکسی آپاتیت پلی کریستالین و کاربرد آن در شکل گیری عصاره
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Hydroxyapatite (HAp), a type of calcium phosphate found in bones and teeth, exhibits proton conductivity. In this study, its conductivity is investigated by measuring the complex permittivity of polycrystalline hydroxyapatite samples obtained via a sintering process. The dielectric dispersions measured from samples with different grain sizes are successfully explained using the Maxwell-Wagner interfacial polarization model. The results show that polycrystalline hydroxyapatite consists of both a high impedance grain boundary and a proton-conductive grain that has a conductivity of about 1.0 Ã 10â 7 S cmâ 1 at 573 K. The interfacial polarization is confirmed using thermally stimulated depolarization current measurements. Additionally, electrets are prepared with the polycrystalline HAp via a poling process, and it is demonstrated that the electret formation is caused by the interfacial polarization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 315, February 2018, Pages 19-25
Journal: Solid State Ionics - Volume 315, February 2018, Pages 19-25
نویسندگان
Naohiro Horiuchi, Kazuki Madokoro, Kosuke Nozaki, Miho Nakamura, Keiichi Katayama, Akiko Nagai, Kimihiro Yamashita,