کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5462846 | 1517188 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of porosity and microstructure on the microwave dielectric properties of rutile
ترجمه فارسی عنوان
اثر تخلخل و ریزساختار بر خواص دی الکتریک مایکروویو روتیل
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کلمات کلیدی
اکسید تیتانیوم، دی الکتریک ریز ساختار، خواص الکتریکی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
The dielectic properties of rutile were strongly affected by porosity and microstructure. The relative permittivity, loss tangent, and temperature coefficient of resonant frequency of titanium oxide in microwave frequency were explored over a broad density range which was controlled through sintering temperature. Permittivity values range between 15 and 115 as the sintering temperature increased from 500 to 1550 °C. The measured permittivity were compared with several types of mixing rules which assumed titania and pores as the constituents. A coherent potential formula was modified to produce the best fit over the largest porosity range. General constitutive formulas were also developed to describe tanδ and TCF and these models work well for intermediate porosity ranges (0.08 < Pore fraction < 0.4); however there were significant deviations at the high and low porosity ranges (Pore fraction < 0.08 and > 0.4). The deviations were attributed to local reduction of the rutile grains and grain boundaries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 200, 1 August 2017, Pages 101-104
Journal: Materials Letters - Volume 200, 1 August 2017, Pages 101-104
نویسندگان
Wei Luo, Jing Guo, Clive Randall, Michael Lanagan,