何当奇
第7楼2008/06/24
The axial and transverse I ratio refer to different orientations of a honeycomb sample in the x-ray beam. The x-ray beam impinges a planar surface at an angle. Measurements of the transverse I ratio are made when the planar surface of the sample is the flat surface made up of as formed wall surfaces of the honeycomb. Measurements of the axial I ratio are made off a plane which is perpendicular-to that for a transverse I ratio where the planar surface on which the x-rays impinge consists of the cross-sectional ends of the honeycomb webs. For a completely randomly oriented cordierite, the I ratio will be about 0.65. If the I ratio measured in the transverse direction with respect to the extrusion direction of the body exceeds 0.69 or the axial I ratio with respect to the extrusion direction is less than about 0.61, then the cordierite crystallites are becoming substantially oriented with respect to the plane of the webs. A high transverse I ratio, or conversely, a low axial I ratio will yield a low thermal expansion as measured in the extrusion or axial direction.
真是贼专业。
翻译不好。但是楼主是本专业的,看看估计应该知道大概了。