BLACK MIXED OXIDE MATERIAL AND METHOD FOR MANUFACTURING SAME
First Claim
1. A black pigment containing an oxide containing La, Mn and Cu as main components, and not containing Cr and Co as the main components, whereinMn is made from Mn3O4, the contents of La, Mn, and Cu in the black pigment satisfy the following ratio:
- 35 to 70% by weight as La2O3; and
25 to 60% by weight as MnO2; and
0.5 to 10% by weight as CuO, respectively, as oxide equivalent amounts in which the total weight is 100% by weight,the black pigment has an average particle size of 20 urn or less,the black pigment in a L*a*b* color system pursuant to JIS-Z-8729 presents a black color with the degree of black (L value) of 25.0 or less,the black pigment has a perovskite phase exhibiting a maximum intensity diffraction peak in a range of 31°
to 34°
of a diffraction angle 2θ
in X-ray diffraction measurement using CuKα
ray as an X-ray source, andthe black pigment contains Mn3O4 that has a spinel structure, as an oxide of Mn.
2 Assignments
0 Petitions
Accused Products
Abstract
Provided are a black mixed oxide that contains chromium per se of any valency as a main component, and fails to contain cobalt as the main component material, and has a high safety, an excellent color tone and economical efficiency, and a method for producing the same, and various products using the black mixed oxide material. The mixed oxides comprise oxides containing La, Mn and Cu as main components but containing neither Cr nor Co as a main component, wherein the contents of La, Mn and Cu in the mixed oxides satisfy the following ratios, as oxide equivalent amount with respect to 100% by weight of the oxide equivalent amount: the La content as La2O3 being 35-70 wt %; the Mn content as MnO2 being 25-60 wt %; and the Cu content as CuO being 0.5-10 wt %.
-
Citations
26 Claims
-
1. A black pigment containing an oxide containing La, Mn and Cu as main components, and not containing Cr and Co as the main components, wherein
Mn is made from Mn3O4, the contents of La, Mn, and Cu in the black pigment satisfy the following ratio: - 35 to 70% by weight as La2O3; and
25 to 60% by weight as MnO2; and
0.5 to 10% by weight as CuO, respectively, as oxide equivalent amounts in which the total weight is 100% by weight,the black pigment has an average particle size of 20 urn or less, the black pigment in a L*a*b* color system pursuant to JIS-Z-8729 presents a black color with the degree of black (L value) of 25.0 or less, the black pigment has a perovskite phase exhibiting a maximum intensity diffraction peak in a range of 31°
to 34°
of a diffraction angle 2θ
in X-ray diffraction measurement using CuKα
ray as an X-ray source, andthe black pigment contains Mn3O4 that has a spinel structure, as an oxide of Mn. - View Dependent Claims (4, 5, 7, 8, 9, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- 35 to 70% by weight as La2O3; and
-
2-3. -3. (canceled)
-
6. (canceled)
-
10. (canceled)
-
13. (canceled)
Specification