Thermally conductive polymer composition and thermally conductive molded object

1. A thermal conductive molded article comprising a thermal conductive polymer composition comprising:

thermal conductive inorganic particles; and an electrically insulating polymer,

wherein the thermal conductive inorganic particles comprise a first component containing boron nitride particles in an aggregated state and a second component which is a component other than the first component,

the second component includes aluminum nitride particles or aluminum oxide particles,

a content of the second component in the thermal conductive inorganic particles is from 5 to 55 vol %,

the thermal conductive inorganic particles of the second component have a volume average particle diameter of 15 μm or more, and

the thermal conductive inorganic particles satisfy all requirements of the following (1) to (3):

(1) to contain particles having a particle diameter of 10 μm to 400 μm in an amount of 80 vol % or more,

(2) to contain particles having a particle diameter of 20 μm to 400 μm in an amount of 60 vol % or more, and

(3) to contain particles having a particle diameter of 30 μm to 400 μm in an amount of 40 vol % or more

wherein a part or the whole of the thermal conductive molded article is formed of the thermal conductive polymer composition, and

a porosity of the part or the whole formed of the thermal conductive polymer composition is 3% or less.

2. The thermal conductive molded article according to claim 1 , wherein a thermosetting resin is contained as the electrically insulating polymer.

3. The thermal conductive molded article according to claim 1 , which is a thermal conductive sheet obtained by molding the thermal conductive polymer composition into a sheet shape.