Synthesis and Characterization of Rutile Pigments with Cr and Nb

Table 3

An effect of calcination temperature on color properties of pigments Ti_0.85Cr_0.05Nb_0.10.

(°C)	Anatase TiO2					Hydrated anatase paste
					(°)					(°)
850	75.67	−2.63	15.84	16.06	99.43	75.56	−1.61	21.22	21.28	94.34
900	77.66	0.62	17.27	17.28	87.94	73.71	0.55	22.74	22.75	88.61
950	69.36	3.04	19.80	20.03	81.27	67.21	3.07	21.47	21.69	81.86
1000	59.48	7.21	27.88	28.80	75.50	50.57	6.23	19.46	20.43	72.25
1050	64.05	17.26	41.84	45.26	67.58	52.55	6.87	22.94	23.95	73.33
1100	60.40	21.74	43.18	48.34	63.28	52.15	11.99	28.18	30.62	66.95
1150	58.32	23.89	43.91	49.99	61.45	50.76	10.81	24.48	26.76	66.17
(°C)	TiOSO4·2H2O					Hydrated Na2Ti4O9 paste
					(°)					(°)
850	73.36	1.17	25.79	25.82	87.40	72.84	2.06	38.94	38.99	86.97
900	77.26	3.56	35.90	36.08	84.34	72.29	2.02	37.59	37.64	86.92
950	75.40	5.32	37.78	38.15	81.98	69.85	1.75	35.21	35.25	87.15
1000	72.98	7.77	39.20	39.96	78.79	68.62	2.96	35.23	35.35	85.20
1050	71.26	12.33	41.51	43.30	73.46	68.82	3.32	35.20	35.36	84.61
1100	71.23	12.24	41.43	43.20	73.54	63.27	4.18	31.48	31.76	82.44
1150	67.70	14.77	41.06	43.64	70.22	58.26	1.50	29.16	29.20	87.06