Alumina particle composite, method of manufacturing the alumina particle composite, resin composition and method of manufacturing the resin composition

Abstract

An alumina particle composite ( 1 ) includes an alumina particle ( 2 ) and an organic acid ( 3 ) chemically bonded to a surface of the alumina particle ( 2 ). Further, the alumina particle ( 2 ) has a short axis length of 1 to 10 nm, a long axis length of 20 to 400 nm, and an aspect ratio of 5 to 80, and is represented by Formula I, Al 2 O 3 .n H 2 O  Formula I where n is 0 or more.

1 . A resin composition, comprising:
 resin; and   an alumina particle contained in the resin as a filler, the alumina particle comprising:
 an alumina body with a short axis length of 1 to 10 nm, a long axis length of 20 to 400 nm and an aspect ratio of 5 to 80, the alumina body being expressed by a Formula I,
   Al 2 O 3   n H 2 O  Formula I 
 
 wherein n is not less than 0, and 
 wherein the aspect ratio of the alumina body is within a range from 45 to 80. 
   
     
     
         2 . A resin composition, comprising:
 resin; and
 an alumina particle contained in the resin as a filler, the alumina particle comprising:
 an alumina body with a short axis length of 1 to 10 nm, a long axis length of 20 to 400 nm and an aspect ratio of 5 to 80, the alumina body being expressed by a Formula I,
   Al 2 O 3   n H 2 O  Formula I 
 
 wherein n is not less than 0, and 
 wherein the alumina body includes one cylindrical hollow inside, and a diameter of the hollow is within a range from 0.5 to 9.5 nm, which is not more than the short axis length of the alumina particle, and a length of the hollow is within a range from 5 to 400 nm, which is not more than the long axis length of the alumina particle.