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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.

isrn materials science

An Inexpensive Route to Synthesize High-Purity <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mtext>CrO</mml:mtext></mml:mrow><mml:mn mathvariant="bold">2</mml:mn></mml:msub></mml:mrow></mml:math> for EMI Shielding in X-Band Frequencies

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