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AssigneeOda Construction Co., Ltd.
InventorsKazuo Oda, Noriho Oda, Nobuaki Miyao
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The present invention is a porous sound-absorbing ceramic form made of a porous ceramic material with communicating pores and having a bulk specific gravity of 0.5 to 1.0. The porous ceramic material consists essentially of 100 parts by weight of perlite having a particle diameter of 0.50 to 2.0 mm, 100 to 200 parts by weight of at least one sintered material selected from the group consisting of fly ash, chamotte, wollastonite, slag, silica, volcanic ejecta, rock, and clay mineral as a matrix material, and 10 to 20 parts by weight of an inorganic binder, which have been sintered so that the matrix material, together with the binder, surrounds the perlite particles. The perlite particles form communicating openings at mutually contacting portions thereof, so that the internal pores are communicating pores. The present invention provides low-cost porous sound-absorbing ceramic forms, such as sound-absorbing bricks and tiles, which exhibit excellent sound-absorbing characteristics over a wide frequency range from low frequencies to high frequencies.
A porous sound-absorbing ceramic form made of a porous ceramic material with communicating pores and having a bulk specific gravity of 0.3 to 1.5, wherein the porous ceramic material consists essentially of 100 parts by weight of perlite having a particle diameter of 0.10 to 8.0 mm, 80 to 250 parts by weight of at least one sintered material selected from the group consisting of fly ash, slag, silica, volcanic ejecta, rock, and clay mineral as a matrix material, and 5 to 30 parts by weight of an inorganic binder, which have been sintered so that the matrix material, together with the binder, surrounds perlite particles, and wherein said perlite particles form communicating openings at mutually contacting portions thereof, so that internal pores are communicating pores.
A porous sound-absorbing ceramic form made of a porous ceramic material with communicating pores and having a bulk specific gravity of 0.5 to 1.0, wherein the porous ceramic material consists essentially of 100 parts by weight of perlite having a particle diameter of 0.50 to 2.0 mm, 100 to 200 parts by weight of at least one sintered material selected from the group consisting of fly ash, chamotte, wollastonite, slag, silica, volcanic ejecta, rock, and clay mineral as a matrix material, and 10 to 20 parts by weight of an inorganic binder, which have been sintered so that the matrix material, together with the binder, surrounds perlite particles, and wherein said perlite particles form communicating openings at mutually contacting portions thereof, so that internal pores are communicating pores.
A porous sound-absorbing ceramic form made of a porous ceramic material with communicating pores and having a bulk specific gravity of 0.5 to 1.0, a bending strength of 10 to 28 kgf/cm2 and a compressive strength of 40 to 90 kgf/cm2, wherein the porous ceramic material consists essentially of 100 parts by weight of perlite having a particle diameter of 0.50 to 2.0 mm, 100 to 200 parts by weight of sintered fly ash as a matrix material, and 10 to 20 parts by weight of an inorganic binder, which have been sintered so that the matrix material, together with the binder, surrounds perlite particles, and wherein said perlite particles form communicating openings at mutually contacting portions thereof, so that internal pores are communicating pores.
A method of producing a porous sound-absorbing ceramic form made of a porous ceramic material with communicating pores and having a bulk specific gravity of 0.3 to 1.2, said method comprising the steps of:
A method of producing a porous sound-absorbing ceramic form made of a porous ceramic material with communicating pores and having a bulk specific gravity of 0.5 to 1.2, said method comprising the steps of:
A method of producing a porous sound-absorbing ceramic form made of a porous ceramic material with communicating pores and having a bulk specific gravity of 0.5 to 1.0, a bending strength of 15 to 28 kgf/cm2 and a compressive strength of 40 to 90 kgf/cm2, said method comprising the steps of:
Dependencies are inferred from the claim text.