Method for manufacturing red ceramic pigment of silicoferrite
A technology of ceramic colorant and production method, which is applied in the production field of ferrosilicon red ceramic colorant, can solve the problems of chromatic aberration color, influence of application range, lightening, etc., and achieves the effect of small color difference change and good stability
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Embodiment 1
[0020] 1): first mix the silicon dioxide (S i o 2 ) and 16% of ferric oxide (F e2 o 3 ) into the ball mill for 13 hours;
[0021] 2): then adding in addition in the ball mill is 3% lanthanum carbonate (La 2 (CO 3 ) 3 ·8H 2 0), ball milling for 2 hours;
[0022] 3): calcining the material obtained in step 2 at 950° C. for 15 hours;
[0023] 4): Crushing the material obtained in step 3 to a particle size of 25 μm.
[0024] The iron-silicon red ceramic pigment obtained in this implementation method has the characteristic of being usable at a relatively low temperature, and is suitable for producing ceramic products with a firing temperature lower than 1050°C.
Embodiment 2
[0026] 1): firstly mix 89% silicon dioxide (S i o 2 ) and 11% of ferric oxide (F e2 o 3 ) into the ball mill for 22 hours;
[0027] 2): then adding in addition in the ball mill is 0.3% lanthanum carbonate (La 2 (CO 3 ) 3 ·8H 2 0), ball milling for 4 hours;
[0028] 3): calcining the material obtained in step 2 at 1100° C. for 10 hours;
[0029] 4): Crushing the material obtained in step 3 to a particle size of 35 μm.
[0030] The iron-silicon red ceramic pigment obtained in this implementation method is suitable for producing ceramic products with a firing temperature of 1050°C to 1150°C.
Embodiment 3
[0032] 1): first mix the silicon dioxide (S i o 2 ) and 14% of ferric oxide (F e2 o 3 ) into the ball mill for 30 hours;
[0033] 2): then adding in addition in the ball mill is 4% lanthanum carbonate (La 2 (CO 3 ) 3 ·8H 2 0), ball milling for 5 hours;
[0034] 3): calcining the material obtained in step 2 at 1150° C. for 4 hours;
[0035] 4): The material obtained in step 3 is put into a crusher and crushed to a particle size of 48 μm.
[0036] The ferrosilicon red ceramic pigment obtained in the implementation method is suitable for producing ceramic products with a firing temperature exceeding 1150°C.
[0037] The lanthanum carbonate (La carbonate) that adds in this preparation method 2 (CO 3 ) 3 ·xH 2 O) will be decomposed at 900°C to generate highly chemically active lanthanum oxide. At the same time, because lanthanum has a large atomic radius, it can fill silicon dioxide (S i o 2 ) wrapped ferric oxide (F e2 o 3 ) when the gap left, so that ferric oxide...
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