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A kind of spherical neodymium pyrosilicate high temperature ceramic pigment and preparation method thereof
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A technology of high-temperature ceramics and pyrosilicic acid, which is applied in the field of spherical neodymium pyrosilicate high-temperature ceramic pigments and its preparation, can solve the problems of irregular shape, poor monodispersity, and different sizes, and achieve regular shape and high-quality products. The effect of stable performance and controllable particle size
Active Publication Date: 2016-04-13
SOUTH CHINA UNIV OF TECH
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However, the Nd prepared by these methods 2 Si 2 o 7 Powder, irregular shape, different size, poor monodispersity
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Embodiment 1
[0033] A spherical neodymium disilicate high-temperature ceramic pigment, the preparation method of which is:
[0034] (1) 5 milliliters of ethyl orthosilicate was added to 250 milliliters of absolute ethanol, after stirring for 10 minutes, 10 milliliters of ammonia water and 10 milliliters of deionized water were added, and the stirring was continued for 3 hours to obtain a white sol;
[0035] (2) centrifuging the white sol, and washing it three times with absolute ethanol to obtain monodisperse spherical silica particles;
[0036] (3) Add 25 millimoles of neodymium nitrate to 80 milliliters of water / alcohol mixed solution (70 milliliters of water and 10 milliliters of ethanol are included in the water / alcohol mixed solution), while adding 10 grams of citric acid as a chelating agent, and use magnetic Stir with a stirrer for 30 minutes, then add 0.3 g of polyethylene glycol PEG-10000, and stir for 2 hours to obtain a stable neodymium-containing sol;
[0037] (4) Add the prep...
Embodiment 2
[0041] A spherical neodymium disilicate high-temperature ceramic pigment, the preparation method of which is:
[0042] (1) 5 milliliters of ethyl orthosilicate was added to 250 milliliters of absolute ethanol, after stirring for 10 minutes, 30 milliliters of ammonia water and 30 milliliters of deionized water were added, and the stirring was continued for 3 hours to obtain a white sol;
[0043] (2) centrifuging the white sol, and washing it three times with absolute ethanol to obtain monodisperse spherical silica particles;
[0044] (3) Add 25 millimoles of neodymium nitrate to 80 milliliters of water / alcohol mixed solution (70 milliliters of water and 10 milliliters of ethanol are included in the water / alcohol mixed solution), while adding 10 grams of citric acid as a chelating agent, and use magnetic Stir with a stirrer for 30 minutes, then add 0.5 g of polyethylene glycol PEG-10000, and stir for 2 hours to obtain a stable neodymium-containing sol;
[0045] (4) Add the prep...
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Abstract
The invention belongs to the field of ceramic pigment preparation, and discloses a spherical mesosilicate neodymium high temperature ceramic pigment and a preparation method thereof. The preparation method comprises the following steps: (1) adding ethyl orthosilicate into anhydrous ethanol, mixing evenly, then adding ammonia and water, and mixing to obtain a sol; (2) centrifuging the obtained sol, washing with the anhydrous ethanol to obtain spherical monodisperse silica particles; (3) adding neodymium nitrate into a water / ethanol mixed solution, adding a chelating agent, stirring, then adding polyethylene glycol, stirring to obtain a neodymium-containing sol; and (4) adding the obtained monodisperse spherical silica particles into the neodymium-containing sol, stirring, evenly dispersing, centrifuging, drying the centrifugal product to obtain a dry solid, putting the dry solid into an electric furnace, thermally treating by temperature programming, and cooling to obtain the spherical mesosilicate neodymium high temperature ceramic pigment. The spherical mesosilicate neodymium high temperature ceramic pigment is regular in morphology, good in monodispersity, and controllable in particle size.
Description
technical field [0001] The invention relates to a ceramic color material, in particular to a spherical neodymium pyrosilicate high-temperature ceramic color material and a preparation method thereof. Background technique [0002] Rare earth elements have a unique electronic structure, that is, there is an unfilled 4f electron layer. When illuminated by different wavelengths, the 4f electron layer exhibits selective absorption and reflection of light, or after absorbing light of one wavelength, it releases Another wavelength of light. Due to this characteristic, rare earth elements can be used as colorants, color aids or color change agents. Rare earth neodymium oxide has many different absorption spectrum peaks in the visible light range. When the wavelength and intensity of incident light are changed, the wavelength and intensity of the reflected light also change accordingly, so that the pigment containing neodymium can be used under different lighting conditions. Produc...
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