A Rutile-type titanium dioxide having a rectangular particulate form configured such that major axial planes of rod-shaped particles having a minor axis diameter of 3 to 10 nm are oriented and aggregated in the minor axial direction, and a rod-shaped rutile-type titanium dioxide obtained by treating the rectangular rutile-type titanium dioxide with heat, wherein an apparent average major axial length of the oriented and aggregated particles is 100 to 400 nm, an apparent average minor axial length thereof is 30 to 150 nm, an apparent average axial ratio represented by apparent average major axial length/apparent average minor axial length is 2 to 5 and a specific surface area thereof is 10 to 100 m
2
/g.
具有矩形颗粒形状的
金红石型
二氧化钛,其配置为
棒状颗粒的主轴平面为3至10纳米的次轴直径,并在次轴方向上定向和聚集,以及通过热处理获得的
棒状
金红石型
二氧化钛,其中定向和聚集颗粒的表观平均主轴长度为100至400纳米,表观平均次轴长度为30至150纳米,表观平均轴比表示为表观平均主轴长度/表观平均次轴长度为2至5,其比表面积为10至100平方米/克。