Abstract: A method for manufacturing a honeycomb structure containing silicon carbide, including blending a recycled raw material derived from a material constituting a first honeycomb structure containing silicon carbide in a process after firing as a part of an initial raw material for a second honeycomb structure containing silicon carbide, wherein the initial raw material comprises silicon carbide and metallic silicon; and the recycled raw material is a powder recovered from the material constituting the first honeycomb structure containing silicon carbide in the process after firing, and after the recovering, a particle size is adjusted so that a 10% diameter (D10) is 10 ?m or more and a 50% diameter (D50) is 35 ?m or less when a cumulative particle size distribution on a volume basis is measured by a laser diffraction/scattering method.

Abstract: In a honeycomb structure, a bonding material monolithically bonds a plurality of honeycomb segments. The bonding material contains crystalline anisotropic ceramic particle and a particulate pore former. The crystalline anisotropic ceramic particle is 20 mass % or less. An average particle diameter of the pore former in the bonding material is 80 to 200 ?m. In the case where a compressive Young's modulus of the bonding material is assumed as E (unit: MPa) and a shear strength of the bonding material is assumed as ? (unit: kPa), ?/E is 5 to 50.

Abstract: In a honeycomb structure, a bonding material monolithically bonds a plurality of honeycomb segments. The bonding material contains crystalline anisotropic ceramic particle and a particulate pore former. The crystalline anisotropic ceramic particle is 20 mass % or less. An average particle diameter of the pore former in the bonding material is 80 to 200 ?m. In the case where a compressive Young's modulus of the bonding material is assumed as E (unit: MPa) and a shear strength of the bonding material is assumed as ? (unit: kPa), ?/E is 5 to 50.

Abstract: Provided are a heat-insulating film and a heat-insulating film structure with improved heat insulating effects. Also provided are a porous plate-shaped filler included in the heat-insulating film and a coating composition for forming the heat-insulating film. In a heat-insulating film of the present invention, porous plate-shaped fillers are dispersedly arranged in a matrix for binding the porous plate-shaped fillers. In the heat-insulating film, the porous plate-shaped fillers are preferred to be arranged (stacked) in a layered state. The porous plate-shaped filler is a plate with an aspect ratio of 3 or more, and has a minimum length of 0.1 to 50 ?m and a porosity of 20 to 99%. The heat-insulating film using the porous plate-shaped fillers ensures a longer length of heat transfer path compared with the case where spherical or cubic fillers are used. Accordingly, the thermal conductivity can be reduced.

Abstract: An optical waveguide device includes a ferroelectric layer having a thickness of 4 ?m-7 ?m; a supporting body; and an adhesive layer adhering a bottom face of the ferroelectric layer and supporting body. The ferroelectric layer includes a ridge comprising a channel optical waveguide, first and second protuberances on opposite sides of the ridge, inner grooves between the ridge and protuberances, respectively, and outer grooves outside of the protuberances, respectively. The outer groove is deeper than the inner groove. The ridge portion has a width of 6.6 ?m-8.5 ?m, a distance of an outer edge of the first protuberance and an outer edge of the second protuberance is 8.6 ?m-20 ?m, the inner groove has a depth of 2.0 ?m-2.9 ?m, and the outer groove has a depth of 2.5 ?m-3.5 ?m.

Abstract: An optical waveguide device includes a ferroelectric layer having a thickness of 4 ?m-7 ?m; a supporting body; and an adhesive layer adhering a bottom face of the ferroelectric layer and supporting body. The ferroelectric layer includes a ridge comprising a channel optical waveguide, first and second protuberances on opposite sides of the ridge, inner grooves between the ridge and protuberances, respectively, and outer grooves outside of the protuberances, respectively. The outer groove is deeper than the inner groove. The ridge portion has a width of 6.6 ?m-8.5 ?m, a distance of an outer edge of the first protuberance and an outer edge of the second protuberance is 8.6 ?m-20 ?m, the inner groove has a depth of 2.0 ?m-2.9 ?m, and the outer groove has a depth of 2.5 ?m-3.5 ?m.