| 摘要 |
PROBLEM TO BE SOLVED: To provide an inorganic black pigment which has a sufficient black degree, is also excellent in thermal stability and heat resistance, and has no causes for concerns about safety and environmental problems; and to provide a black pigment which has a sufficient ability to shield near infrared rays. SOLUTION: The black pigment is prepared by forming a solid solution with 0.05-5 mol% of at least one element selected from among Mg, Mn and Zn in composite oxides containing Ca and Fe. This black pigment has a black degree (L<SP>*</SP>value) of 30 or less and a solar reflectance of 10% or more in wavelengths ranging from 700 to 2,100 nm, so that the black pigment has the sufficient black degree and the sufficient ability to shield near infrared rays. This black pigment is manufactured by mixing calcium and iron compounds with a compound containing at least one element selected from among Mg, Mn and Zn and firing the mixture. COPYRIGHT: (C)2009,JPO&INPIT
|
