Thermally stable polymer–ceramic composites for microwave antenna applications
Abstract Polymer–ceramic composites were prepared by twin screw melt extrusion with high-density polyethylene (HDPE) as the matrix and polystyrene-coated BaO–Nd2O3–TiO2 (BNT) ceramics as the filling material. Interestingly, the incorporation of polystyrene (PS) by the coating route could significant...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2016-12-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s40145-016-0199-8 |
| _version_ | 1827843055728721920 |
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| author | Li Zhang Jie Zhang Zhenxing Yue Longtu Li |
| author_facet | Li Zhang Jie Zhang Zhenxing Yue Longtu Li |
| author_sort | Li Zhang |
| collection | DOAJ |
| description | Abstract Polymer–ceramic composites were prepared by twin screw melt extrusion with high-density polyethylene (HDPE) as the matrix and polystyrene-coated BaO–Nd2O3–TiO2 (BNT) ceramics as the filling material. Interestingly, the incorporation of polystyrene (PS) by the coating route could significantly improve the thermal behaviors of the composites (HDPE–PS/BNT), besides the temperature stability of dielectric properties and thermal displacement. The microwave dielectric properties of the composites were investigated systematically. The results indicated that, as the volume fraction of BNT ceramic particles increased from 10 to 50 vol% in the composites, the dielectric constant increased from 3.54 (9.23 GHz) to 13.14 (7.20 GHz), which can be beneficial for the miniaturization of microwave devices; the dielectric loss tangent was relatively low (0.0003–0.0012); more importantly, the ratio of PS to HDPE increased accordingly, making the composite containing 50 vol% BNT ceramics have a low value of temperature coefficient of resonant frequency (τ f = −11.2 ppm/°C) from −20 to 60 °C. The GPS microstrip antennas were therefore designed and prepared from the HDPE–PS/BNT composites. They possessed good thermal stability (τ f = 23.6 ppm/°C) over a temperature range of −20 to 60 °C, promising to meet the requirements of practical antenna applications. |
| first_indexed | 2024-03-12T08:19:16Z |
| format | Article |
| id | doaj.art-db0b7d98943f458db65bd7c5a6d97b15 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T08:19:16Z |
| publishDate | 2016-12-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-db0b7d98943f458db65bd7c5a6d97b152023-09-02T18:37:41ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082016-12-015426927610.1007/s40145-016-0199-8Thermally stable polymer–ceramic composites for microwave antenna applicationsLi Zhang0Jie Zhang1Zhenxing Yue2Longtu Li3State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityAbstract Polymer–ceramic composites were prepared by twin screw melt extrusion with high-density polyethylene (HDPE) as the matrix and polystyrene-coated BaO–Nd2O3–TiO2 (BNT) ceramics as the filling material. Interestingly, the incorporation of polystyrene (PS) by the coating route could significantly improve the thermal behaviors of the composites (HDPE–PS/BNT), besides the temperature stability of dielectric properties and thermal displacement. The microwave dielectric properties of the composites were investigated systematically. The results indicated that, as the volume fraction of BNT ceramic particles increased from 10 to 50 vol% in the composites, the dielectric constant increased from 3.54 (9.23 GHz) to 13.14 (7.20 GHz), which can be beneficial for the miniaturization of microwave devices; the dielectric loss tangent was relatively low (0.0003–0.0012); more importantly, the ratio of PS to HDPE increased accordingly, making the composite containing 50 vol% BNT ceramics have a low value of temperature coefficient of resonant frequency (τ f = −11.2 ppm/°C) from −20 to 60 °C. The GPS microstrip antennas were therefore designed and prepared from the HDPE–PS/BNT composites. They possessed good thermal stability (τ f = 23.6 ppm/°C) over a temperature range of −20 to 60 °C, promising to meet the requirements of practical antenna applications.http://link.springer.com/article/10.1007/s40145-016-0199-8polymer–ceramic compositesmicrowave dielectric propertiesthermal stabilityGPS antenna |
| spellingShingle | Li Zhang Jie Zhang Zhenxing Yue Longtu Li Thermally stable polymer–ceramic composites for microwave antenna applications Journal of Advanced Ceramics polymer–ceramic composites microwave dielectric properties thermal stability GPS antenna |
| title | Thermally stable polymer–ceramic composites for microwave antenna applications |
| title_full | Thermally stable polymer–ceramic composites for microwave antenna applications |
| title_fullStr | Thermally stable polymer–ceramic composites for microwave antenna applications |
| title_full_unstemmed | Thermally stable polymer–ceramic composites for microwave antenna applications |
| title_short | Thermally stable polymer–ceramic composites for microwave antenna applications |
| title_sort | thermally stable polymer ceramic composites for microwave antenna applications |
| topic | polymer–ceramic composites microwave dielectric properties thermal stability GPS antenna |
| url | http://link.springer.com/article/10.1007/s40145-016-0199-8 |
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