| abstract |
(57) [Summary] [Configuration] The shape factor f defined by the following equation (a) satisfies the equation (b), a hollow space exists inside, and the following equations (c) to ( Tube-shaped composite synthetic inorganic fine particles satisfying h). (A) f = Vav ÷ {4/3 × π × (dx1 ÷ 2) 3 }, (b) 0 <f ≦ 0.60, (c) 2 ≦ n ≦ 1 000, (d) 0.1≤dx1≤1000 (μm), (E) 0.1 ≦ dx2 ≦ 1000 (μm), (f) 0. 05 ≦ dx3 ≦ 100 (μm), (g) 0.02 ≦ dx 4 ≦ 95 (μm), (h) 0.05 ≦ dx4 / dx3 ≦ 0.95 Vav is the average value (10 -18 × m 3 ) of the volume of the tubular composite synthetic inorganic fine particles measured by an electron micrograph, n Is the average value of the number of tubular particles constituting the same fine particles, dx1 is the average particle diameter (μm) of the long diameter of the fine particles, dx2 Is the longest diameter of the tubular particles constituting the same fine particles, dx3 Is the outer diameter (minor diameter), dx4 is the average particle diameter of the inner diameter (μm ). [Effect] It is useful as a carrier such as a catalyst, an adsorbent, a sustained-release material, a filler for plastics, and an anti-blocking agent for fibers. |