Pink and violet pigments that display heat stability, resistance to acidic conditions, and good lightfastness
There are very few violet or pink colored commercial pigments that display high heat stability, resistance to acidic conditions, or good lightfastness. This technology results in pigments that fall into the above color space, but display improved chemical and weathering stability. The pigments based of this technology have the molar ratio (A 2 O) x (BO) y (C 2 O 5 ) z (DO 3 ) w (EO 2 ) v , where 2x+y+2z+w+v≅100. Where A is Li or Li with one or more of Cu, Na, or K, where B is Co or Co with one or more of Ca, Cu, Fe, Mg, Mn, Ni, Sn, or Zn, where C is Nb, Sb, or combination thereof, where D is Mo, W or combination thereof, where E is Sn, Ti, Zr, or combination thereof. The above formulation may be modified with a dopant addition of Al, B, Ba, Bi, Ca, Ce, Cr, La, P, Pr, Si, Sr, Ta, V, or Y where the dopant concentration represents 5 atomic % or less of the total number of moles of components A+B+C+D+E.
1. An inorganic pigment having a molar ratio:
(A 2 O) x (BO) y (C 2 O 5 ) z (DO 3 ) w (EO 2 ) v , where:
5≤x≤20
10≤y≤45
17≤z≤30
0≤w≤5,
0≤v≤5; and
where 2x+y+2z+w+v≅100;
and where A is Li or Li in combination with Cu, Na, K, or combinations thereof; where B is Co, or Co in combination with Ca, Cu, Fe, Mg, Mn, Ni, Sn, Zn, or combinations thereof; where C is one or more of Nb, Sb, or combination thereof; where D is one or more of Mo, W or combination thereof; where E is one or more of Sn, Ti, Zr, or combination thereof.
2. The inorganic pigment of claim 1 having the molar ratio:
(A 2 O) x (BO) y (C 2 O 5 ) z (DO 3 ) w (EO 2 ) v , where:
7≤x≤17.5
15≤y≤40
20≤z≤26
0≤w≤5,
0≤v≤5; and
where 2x+y+2z+w+v≅100.
3. The inorganic pigment of claim 2 , where greater than 50 atomic % of A is Li.
4. The inorganic pigment of claim 2 , where greater than 50 atomic % of B is Co.
5. The inorganic pigment of claim 2 , where greater than 50 atomic % of C is Sb.
6. The inorganic pigment of claim 2 , where A is Li, B is Co and C is Sb.
7. The inorganic pigment of claim 2 , where at least 5 atomic % of A is Cu, Na, or K.
8. The inorganic pigment of claim 2 , where at least 5 atomic % of B is Cu, Ni, Mg, or Zn.
9. The inorganic pigment of claim 2 , where at least 5 atomic % of C is Nb.
10. The inorganic pigment of claim 2 , where w>0.
11. The inorganic pigment of claim 2 , where v>0.
12. The inorganic pigment of claim 2 , where v=w and v>0.
13. The inorganic pigment of claim 2 having a dopant addition of Al, B, Ba, Bi, Ca, Ce, Cr, La, P, Pr, Si, Sr, Ta, V, or Y, where the dopant concentration represents 5 atomic % or less of the total number of moles of components A+B+C+D+E.
14. The inorganic pigment of claim 1 , having a molar ratio
(A 2 O) x (BO) y (C 2 O 5 ) z (DO 3 ) w (EO 2 ) v , where:
10≤x≤15
20≤y≤30
20≤z≤26
0≤w≤5,
0≤v≤5, and
where 2x+y+2z+w+v≅100.
15. The inorganic pigment of claim 14 , where greater than 50 atomic % of A is Li.
16. The inorganic pigment of claim 14 , where greater than 50 atomic % of B is Co.
17. The inorganic pigment of claim 14 , where greater than 50 atomic % of C is Sb.
18. The inorganic pigment of claim 14 , where A is Li, B is Co and C is Sb.
19. The inorganic pigment of claim 14 , where at least 5 atomic % of A is Cu, Na, or K.
20. The inorganic pigment of claim 14 , where at least 5 atomic % of B is Cu, Ni, Mg, or Zn.
21. The inorganic pigment of claim 14 , where at least 5 atomic % of C is Nb.
22. The inorganic pigment of claim 14 , where w>0.
23. The inorganic pigment of claim 14 , where v>0.
24. The inorganic pigment of claim 14 , where v=w and v>0.
25. The inorganic pigment of claim 14 having a dopant addition of Al, B, Ba, Bi, Ca, Ce, Cr, La, P, Pr, Si, Sr, Ta, V, or Y where the dopant concentration represents 5 atomic % or less of the total number of moles of components A+B+C+D+E.