Praseodymium yellow material for ceramic ink and preparation method thereof
A technology of praseodymium yellow material and ceramic ink, which is applied in the field of preparation of praseodymium yellow material, can solve the problems of poor chemical stability, insufficient color development strength, large particle size of powder, etc., and achieves improved product stability, low synthesis difficulty, and development The effect of color intensity enhancement
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[0022] In view of the fact that in the existing methods for preparing colorants for ceramic inks, the color of the raw materials will become lighter after grinding, the present invention provides a method for preparing microcrystals of praseodymium yellow materials for ceramic inks. Raw materials with a microcrystalline structure are used to synthesize colorants for ceramic inks, and seed introduction technology is used to ensure synthesis speed and high temperature stability.
[0023] First, when preparing seed crystals, the fineness activity and mixing uniformity of raw materials are changed by ball milling. Because it is difficult to evenly disperse materials less than 1% of the total weight into the system when the solid powder is mixed, the materials such as praseodymium compounds are evenly distributed and the fineness is refined by ball milling. According to the solid-phase reaction mechanism, highly uniformly distributed materials are more likely to undergo high-temper...
Embodiment 1
[0039] The preparation method of the praseodymium yellow material for the ceramic ink of the present embodiment comprises the steps:
[0040] 1. Seed crystal preparation:
[0041] 1) Prepare and mix zirconia, quartz powder, praseodymium oxide, and lithium fluoride in a weight percentage of 55:30:5:2 to obtain a mixture;
[0042] 2) Mix the mixture obtained in step 1) with agate ball stones and water at a weight ratio of 100:500:60, put it into a ball mill for about 72 hours, and the particle size after ball milling will reach D90≤5μm;
[0043] 3) Dry the mixture obtained after ball milling in step 2) in a temperature environment below 150°C, so that the moisture content of the dried mixture is <0.5%; pass the dried product through a 325-mesh sieve;
[0044] 4) Mix the above-mentioned sieved mixture with lithium fluoride micropowder with a mass concentration of 99% at a mass ratio of 96.5:3.5 and stir evenly;
[0045] 5) Put the above mixture into a crucible for calcination. ...
Embodiment 2
[0064] The preparation method of the praseodymium yellow material for the ceramic ink of the present embodiment comprises the steps:
[0065] 1. Seed crystal preparation:
[0066] 1) Prepare and mix zirconia, quartz powder, praseodymium oxide, and lithium fluoride in a weight percentage of 50:35:7:3 to obtain a mixture;
[0067] 2) Mix the above mixture with agate ball stones and water at a weight ratio of 100:520:64, and then use a ball mill to mill for about 78 hours. After milling, the particle size reaches D90≤5μm;
[0068] 3) Dry the above mixture at a temperature below 150°C, so that the moisture content of the dried mixture is <0.5%; pass the dried product through a 325-mesh sieve;
[0069] 4) Mix the above sieved mixture with boric acid with a concentration of 99% in a mass ratio of 95:5 and stir evenly;
[0070] 5) Put the above mixture into a crucible for calcination. The calcination process conditions are as follows: 25°C-300°C, heat up for 2H; 300°C-600°C, heat u...
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