Thermal shock resistant porous sound absorbing body

Details Thermal shock resistant porous sound absorbing body Thermal shock resistant porous sound absorbing body

1983-01-07

1984-11-06

Lieberman, Paul

Compositions

Electrolytes for electrical devices

501 80, C04B 4300, E04B 174

Patent

active

044811241

ABSTRACT:
A thermal shock resistant porous sound absorbing body having high durability in which the prior drawbacks of sound absorbing bodies have been obviated, is produced by sintering a mixture comprising 100 parts by volume of ceramic particles having a bulk density of 1.2-2.0 kg/l, a grain size of 0.3-4.0 mm, a thermal expansion coefficient of less than 70.times.10.sup.-7 /.degree. C. and a fire resistant temperature of higher than 1,000.degree. C. and 4-18 parts by volume of an inorganic binder having a melting temperature of lower than that of the ceramic particles and a thermal expansion coefficient of lower than that of the ceramic particles, and further a sizing agent.

REFERENCES:
patent: 3488723 (1970-01-01), Veazie
patent: 3950175 (1976-04-01), Lachman et al.
patent: 3954672 (1976-05-01), Sommers et al.
patent: 3958582 (1976-05-01), Noda et al.
patent: 3991254 (1976-11-01), Takeuchi
patent: 4280845 (1981-07-01), Matnikisa et al.
The Journal of the Acoustical Society of America, vol. 19, No. 4, Jul. 1947, "Acoutical Properties of Homogeneous, Isotropic Rigid Tiles and Flexible Blankets", by Leo L. Beranek.

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