Microwave absorption compound material

• Main Authors: LIN, ZHONG-KUI, HUANG, YAO-HUI, YANG, RUI-BIN, CAI, JIAN-YI, HONG, DONG-XING, YE, DONG-SHENG
• Format: Patent
• Language: Chinese; English
• Published: 16.08.2011
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PRINTED CIRCUITS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention provides a microwave absorption compound material, which is formed by mixing oxide magnetic material powder and carbon nanotube powder in a bonding agent based on predetermined weight percentage, and can be composed of a single layer compound material or superposition of a plurality of layers. The oxide magnetic material is La-Sr-Mn oxide. The bonding agent is epoxy resin. The weight percentage of the oxide magnetic material powder in the bonding agent is 60% to 80%. The weight percentage of the carbon nanotube powder is 0.5% to 2%; the absorption bandwidth (-10 dB) is widest at 3.3GHz. when the compound material with thickness of 3mm is formed by blending the oxide magnetic material powder with 80wt% and the carbon nanotube powder with 2wt%. In addition, the wave-absorbing effect can reach -22.85 dB at the central frequency of 9.5GHz. When the compound material with thickness of 4mm is formed by the oxide magnetic material powder with 60wt% and the carbon nanotube powder with 2wt%, maximum wave