Abstract: There is provided an exhaust gas purification device that shows a high HC removal performance under a condition in which a rich air-fuel mixture is introduced. The exhaust gas purification device includes a substrate, a first catalyst layer, and a second catalyst layer. The substrate includes an upstream end and a downstream end. The first catalyst layer is disposed on a surface of the partition wall in an upstream region including the upstream end of the substrate. The second catalyst layer is disposed inside the partition wall in a downstream region including the downstream end of the substrate. The first catalyst layer contains a first metal catalyst and alumina-zirconia composite oxide. The second catalyst layer contains a second metal catalyst.

Abstract: A mass spectrometry data processing apparatus includes a data analysis unit that processes a mass spectrum of each of analysis-target areas within a two-dimensional range set on a sample. The data analysis unit obtains a plurality of mass spectra each associated with position information of a corresponding one of the analysis-target areas; creates an average mass spectrum that is an average of the plurality of obtained mass spectra; extracts, for each mass range, a highest peak by comparing the plurality of obtained mass spectra with one another, and creates a maximum mass spectrum constituted by the extracted highest peaks; creates an intensity ratio spectrum indicating an intensity ratio of the average mass spectrum to the maximum mass spectrum; and selects a peak in a range of a threshold set for the intensity ratio spectrum and specifies a mass range including the peak.

Abstract: A method of manufacturing a vitreous silica crucible includes: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a cross-sectional shape of an inverse trapezoid and a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line. The groove line is formed by repeating shifting a focal point of a laser.

Abstract: A method of manufacturing a vitreous silica crucible includes: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a cross-sectional shape of an inverse trapezoid and a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line. The groove line is formed by repeating shifting a focal point of a laser.

Abstract: The present invention provides a method of manufacturing a vitreous silica crucible including: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line.

Abstract: A mass spectrometry data processing apparatus includes a data analysis unit that processes a mass spectrum of each of analysis-target areas within a two-dimensional range set on a sample. The data analysis unit obtains a plurality of mass spectra each associated with position information of a corresponding one of the analysis-target areas; creates an average mass spectrum that is an average of the plurality of obtained mass spectra; extracts, for each mass range, a highest peak by comparing the plurality of obtained mass spectra with one another, and creates a maximum mass spectrum constituted by the extracted highest peaks; creates an intensity ratio spectrum indicating an intensity ratio of the average mass spectrum to the maximum mass spectrum; and selects a peak in a range of a threshold set for the intensity ratio spectrum and specifies a mass range including the peak.

Abstract: The present invention provides a method of manufacturing a vitreous silica crucible including: a taking-out process of taking out the vitreous silica crucible from the mold, a honing process of removing the unfused silica powder layer on the outer surface of the vitreous silica crucible, and further comprising, after the taking-out process and before the honing process, a marking process of marking an identifier comprised of one or more groove line on the outer surface of the vitreous silica crucible, wherein the groove line after the honing process has a depth of 0.2 to 0.5 mm, and a width of 0.8 mm or more at the opening of the groove line.