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AssigneeSumitomo Metal Mining Co., Ltd.
InventorsKeisuke MACHIDA, Hirofumi TSUNEMATSU, Kenichi FUJITA
Estimating the term…
There is provided new transparent near infrared absorptive fine particles having a wide range of near infrared absorption, which are an assembly of hexaboride fine particles, wherein when a particle shape of the number of particles contained in the assembly is approximately regarded as a spheroid body, there are 20% or more and less than 80% of particles having an aspect ratio [(long axis length)/(short axis length)] of 1.5 or more and less than 5.0, and there are 20% or more and less than 80% of particles having an aspect ratio of 5.0 or more and less than 20.0.
1-16. (canceled)
An assembly of hexaboride fine particles, wherein when a particle shape of the hexaboride fine particles contained in the assembly is regarded as a spheroid body, and when the number ratio of the hexaboride fine particles contained in the assembly and having an aspect ratio [(long axis length)/(short axis length)] of 1.5 or more and less than 4.0 is expressed as a (number) %, and the number ratio of hexaboride fine particles contained in the assembly and having an aspect ratio [(long axis length)/(short axis length)] of 4.0 or more and less than 20.0 is expressed as b (number) %, 60 (number) %≦(a+b) (number) %≦100 (number) %, and a:b=20:80 to 80:20 are satisfied.
Dependencies are inferred from the claim text.