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김동일(Dong Il Kim),최동한(Dong Han Choi),구동우(Dong Woo Ku),김도연(Do Yearn Kim),옥승민(Seung Min Ok),양은정(Eun Jung Yang),김보영(Bo Young Kim) 한국항해항만학회 2002 한국항해항만학회 학술대회논문집 Vol.1 No.-
In this paper, we explain new EM(electromagnetic) wave absorber that mixed NC(Natural Ceramics) and Ferrite with NL(Natural Lacquer). At first, a mixed NC and Ferrite(NC : F = (0.1~30)wt% : (99.9~70)wt%) burn at 950˚~1250˚C. And then, it is comminuted and injected into NL((NC+F) : NL = (30~80)wt% : (70~20)wt%), finally we made Ferrite-NL EM wave absorber. Generally, conventional labor Ferrite covers only 500 MHz to 10 GHz under tolerance limits of 2 to 6 dB in absorption, and Ferrite-NL is over 8~14 dB. However, NCFerrite-NL has superior absorption ability. It is over 16 ro 19 dB through 500 MHz to 10 GHz.