To provide a cement type radio wave absorber showing an absorption property stable in a high-frequency band of 1 GHz or higher, having workability with fluidity, and the like, and a strength and a radio wave absorption property together, being thin and light with a high dielectric constant and a dielectric loss, being durable in outdoor use for a long term because of nonflammability and no degradation with ultraviolet rays, being no need for a back metal, being inexpensive, excellent in reliability, able to relieve sizing accuracy, workable with direct adhesion on sprayed mortar like a usual tile and being excellent in workability and reliability with direct spraying or mortar coating, or the like, on an optional substrate.
A flat iron oxide powder whose mean thickness is 30 μm or less and where the weight ratio of particles having a shortest size in a face of more than 25 μm is 50% or more is mixed with a hydrated and solidified inorganic material to form the cement type radio wave absorber.
HOSOI KOICHI
IMAOKA SUSUMU
KAJIMA YOSHIO
| JP2002198683A | 2002-07-12 | |||
| JP2003229693A | 2003-08-15 | |||
| JPH11284383A | 1999-10-15 |
Makoto Suhara