RADAR absorption study of BaFe12O19/ZnFe2O4/CNTs nanocomposite
| Autor: | V.S. Pandey, T. C. Shami, Avesh Garg, Sachin Tyagi, Shivanshu Goel, Nitin Tyagi, Himangshu Bhusan Baskey |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Nanocomposite Silicon Mechanical Engineering Thermal decomposition Reflection loss Composite number Metals and Alloys Nanoparticle chemistry.chemical_element Barium 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Zinc ferrite chemistry Mechanics of Materials 0103 physical sciences Materials Chemistry Composite material 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 731:584-590 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2017.10.071 |
| Popis: | Magnetic composite comprising barium hexaferrite and zinc spinel ferrite nanoparticles, BaFe12O19/ZnFe2O4 has been synthesized by auto-combustion method including citrate precursor using the sol-to-gel (S–G) followed by gel-to-nanocrystalline (G–N) conversion. The resulting ‘as synthesized’ powder is heat treated (HT) at 700 °C for 2 h in air atmosphere. The hysteresis loops show an increase in saturation magnetization from 24.10 to 53.49 emu/g with increasing HT temperatures. The multiwalled carbon nano tubes (CNTs) were synthesized by thermal decomposition of acetylene gas over iron-catalyst coated silicon substrate in the temperature range of 750–800 °C. A RADAR absorbing medium is developed by dispersing CNTs in the magnetic composite of barium and zinc ferrite nanoparticles. Reinforcement of certain mass of CNTs improves the RADAR absorption properties and wave band of BaFe12O19/ZnFe2O4 absorbent. When 20 wt% CNTs is mixed with BaFe12O19/ZnFe2O4 nanoparticles to fabricate a composite with 2 mm thickness, the maximum reflection loss reaches to −43.22 dB at 10.30 GHz and −10 dB bandwidth reaches 2.95 GHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect