Patent ID: 8217106

Claim:
An optical diffusible material having a total transparency of 70% or more and an optical diffusible ability of 50% or more, comprising ceramic particles contained in a base material, the ceramic particles satisfying the following requirements (I) and (II): (I) the total amount of (Al 2 O 3 or MgO) and SiO 2 is 95% by weight or more; and (II) the weight ratio of (Al 2 O 3 or MgO) to SiO 2 ((Al 2 O 3 or MgO)/SiO 2 ) is 0.3 to 9; wherein the base material is a resin; wherein the ceramic particles are contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the base material; wherein the ceramic particles are produced by a flame fusion method with a flame temperature of 2000° C. or more; and wherein the water absorption of the ceramic particles is 0.8% by weight or less.