An Inexpensive Route to Synthesize High-Purity CrO2 for EMI Shielding in X-Band Frequencies | Zendy

Vivek Verma | Zendy; Shahab Ahmad | Zendy; Abdullah Dar | Zendy; R.K. Kotnala | Zendy

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An Inexpensive Route to Synthesize High-Purity CrO2 for EMI Shielding in X-Band Frequencies

Author(s) -

Vivek Verma,

Shahab Ahmad,

Abdullah Dar,

R.K. Kotnala

Publication year - 2012

Publication title -

isrn materials science

Language(s) - English

Resource type - Journals

eISSN - 2090-6099

pISSN - 2090-6080

DOI - 10.5402/2012/948219

Subject(s) - microwave , permittivity , electromagnetic shielding , analytical chemistry (journal) , materials science , x band , microstructure , absorption (acoustics) , saturation (graph theory) , chemistry , optoelectronics , computer science , telecommunications , dielectric , mathematics , composite material , chromatography , combinatorics

Rod-shaped high-purity samples of CrO 2 have been synthesized by an inexpensive and simplified procedure. Here, we have prepared pure CrO 2 without applying any external pressure or control it during synthesis. The sample prepared exhibited an improvement in saturation magnetization values, 68 emu/g at 300 K, 136 emu/g at 80 K, and uniform grained microstructure. The complex permittivity, permeability, and microwave absorption properties of high-purity CrO 2 sample were investigated in the 8.2–12.2 GHz (X-band) microwave frequency range. Microwave measurements have shown the high shielding effectiveness due to absorption (SE A ) of 20.3 dB. The high value of SE A suggests that CrO 2 can be used as a promising electromagnetic shielding, EMI, material in 8.2–12.2 GHz (X-band) microwave frequency range.

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