CN114702336A - White polycrystalline dry-grain ceramic rock plate and preparation method thereof - Google Patents
White polycrystalline dry-grain ceramic rock plate and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C12/00—Powdered glass; Bead compositions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention belongs to the field of ceramic building materials, and particularly provides a white polycrystalline dry-grain ceramic rock plate and a preparation method thereof. The preparation method comprises the following steps: applying base coat on the surface of the blank; printing an effect pattern on the surface of the blank body after the ground coat is applied by ink jet; applying an isolation glaze on the surface of the blank after the pattern with the effect is printed by ink jet, wherein the initial melting temperature of the isolation glaze is 1000-1050 ℃; positioning and applying white polycrystalline dry particles on the surface of the blank body after the isolation glaze is applied, wherein the initial melting temperature of the white polycrystalline dry particles is 1050-1100 ℃, and the initial melting temperature of the white polycrystalline dry particles is higher than that of the isolation glaze by 50-100 ℃; applying transparent glaze on the surface of the blank body coated with the white polycrystalline dry particles; and firing and polishing the blank body after the transparent glaze is applied in a kiln to obtain the white polycrystalline dry-grain ceramic rock plate. The crystal pattern decoration effect of the white polycrystalline dry-particle ceramic rock plate is good, and the polished surface of the rock plate is transparent.
Description
Technical Field
The invention belongs to the field of ceramic building materials, and particularly relates to a white polycrystalline dry-grain ceramic rock plate and a preparation method thereof.
Background
With the increasing application scenes of ceramic products and the vigorous popularization of the market, the ceramic rock boards used as building decoration materials and home decoration materials are more and more in variety, and higher requirements on rock board materials, pattern layers and texture colors are provided for consumers. In the traditional production process of the polycrystalline micropowder brick, green body micropowder is mixed with a coloring material and is pressed and formed by dry-method material distribution, and a polycrystalline product is prepared by polishing after sintering, and has single decorative color and poor decorative effect.
Disclosure of Invention
In order to enrich the decoration technology of the ceramic rock plate, the invention provides a white polycrystalline dry-grain ceramic rock plate and a preparation method thereof. The white polycrystalline dry-grain ceramic rock plate forms white crystal flowers with different shapes on the surface of a brick, and is matched with suitable and colorful ink-jet patterns, so that a rock plate product with a special crystal flower effect and strong stereoscopic impression is formed. Compared with the common ink-jet natural surface ceramic rock plate, the white polycrystalline dry particle ceramic rock plate has good crystal flower decoration effect, the polished surface of the rock plate is transparent, and particularly, patterns in light gray, beige and other color systems are matched, so that a better decoration effect can be obtained.
In a first aspect, the invention provides a method for preparing a white polycrystalline dry-grained ceramic rock plate. The preparation method comprises the following steps:
applying base coat on the surface of the blank; printing an effect pattern on the surface of the blank body after the ground coat is applied by ink jet; applying an isolation glaze on the surface of the blank after the pattern with the effect is printed by ink jet, wherein the initial melting temperature of the isolation glaze is 1000-1050 ℃; the chemical composition of the isolation glaze comprises: by mass percent, SiO2：48-50%、Al2O3：10-13%、TiO2: 1.0-2.0%, alkaline earth metal oxide: 15-19%, alkali metal oxide: 4.5-7.5%, ZnO: 5.0 to 6.0 percent; positioning and applying white polycrystalline dry particles on the surface of the green body after the isolation glaze is applied, wherein the initial melting temperature of the white polycrystalline dry particles is 1050-1100 ℃, and the initial melting temperature of the white polycrystalline dry particles is 50-100 ℃ higher than that of the isolation glaze; the chemical composition of the white polycrystalline dry grains comprises: by mass percent, SiO2：41-45%、Al2O3: 13-15%, alkaline earth metal oxide: 24-29.5%, alkali metal oxide: 3.5-6.0% of ZrO2: 6.0-7.0%, F: 2.5 to 3 percent; applying transparent glaze on the surface of the blank body coated with the white polycrystalline dry particles; and firing and polishing the blank body after the transparent glaze is applied in a kiln to obtain the white polycrystalline dry-grain ceramic rock plate.
Preferably, the mineral composition of the white polycrystalline dry grains comprises: by mass percentage, 30-35% of albite, 10-13% of potash feldspar, 4-6% of fluorite, 20-25% of dolomite, 3-5% of calcite, 7-8% of barium carbonate, 7-9% of zircon powder and 8-12% of burnt soil.
Preferably, the application amount of the white polycrystalline dry particles is 400-600g/m2。
Preferably, the grain size of the white polycrystalline dry grains is 40-150 meshes.
Preferably, the application mode of the isolation glaze is glaze spraying; the specific gravity of the isolation glaze is 1.35-1.40g/cm3The glazing amount is 200-2。
Preferably, the chemical composition of the transparent glaze comprises: by mass percent, SiO2：55-60%、Al2O3: 15-18%, alkaline earth metal oxide: 13-17%, alkali metal oxide: 5.5-8.0%, ZnO: 5.0 to 6.0 percent.
Preferably, the application mode of the transparent glaze is glaze pouring; the specific gravity of the transparent glaze is 1.55-1.58g/cm3The glazing amount is 1160-1170g/m2。
Preferably, the chemical composition of the ground glaze comprises: by mass percent, SiO2：56-60%、Al2O3: 28-30%, alkaline earth metal oxide: 2.1-3.3%, alkali metal oxide: 7.0 to 9.5 percent.
Preferably, the maximum firing temperature of the firing is 1180-1220 ℃, and the firing time is 60-90 minutes.
In a second aspect, the invention provides a white polycrystalline dry-grain ceramic rock plate, which is obtained by any one of the preparation methods. In some technical schemes, the specification of the ceramic rock plate is 2700-.
Drawings
Fig. 1 is a graph of the effect of a white polycrystalline dry-grained ceramic rock plate prepared in example 1;
fig. 2 is a graph showing the effect that white polycrystalline was not formed in the ceramic rock plate prepared in comparative example 4.
Detailed Description
The present invention is further illustrated by the following examples, which are to be understood as merely illustrative of, and not restrictive on, the present invention. Unless otherwise specified, each percentage refers to a mass percentage. The following is an exemplary description of the method of making white polycrystalline dry-grained ceramic rock slabs according to the present invention.
And pressing and molding the rock plate blank to obtain a blank of the ceramic rock plate. The chemical composition and raw material composition of the rock plate blank are not limited, and the rock plate blank commonly used in the field can be adopted. As an example, the chemical composition of the rock plate blank may include: loss on ignition by mass percent: 4.0-4.8% of SiO2：60-65%、Al2O3：20-22%、Fe2O3：0.1-0.5%、TiO2：0.05-0.3%、CaO：0.4-0.5%、MgO：0.5-1.0%、K2O：2.0-3.0%、Na2O: 3.0 to 4.0 percent. The rock plate blank obtained by molding the rock plate blank with the chemical composition has high whiteness. In some embodiments, the whiteness of the body is from 60 to 80 degrees.
The grain composition of the rock plate blank has a certain influence on the formability of the blank. The grain grading of the rock panel blank may include: calculated by mass percentage, 30 meshes above: 20 to 25 percent; 30-80 meshes: 60 to 70 percent; 80 meshes below: 6% or less. The term "30 mesh or larger" means a part staying on a 30 mesh screen. The 80 mesh or less means a portion passing through an 80 mesh screen. The grain composition of the rock plate blank is controlled within the range, the blank has high fluidity, and delamination is not easy to cause. Otherwise, the rock plate blank is too thin, which easily causes delamination; the rock plate blank is too coarse, the yield of subsequent blank spray drying is low, and the collection is difficult to cause serious material waste.
When the rock plate blank is prepared, mixing the raw materials of the rock plate blank, adding water, ball-milling uniformly, and spray-drying to obtain the rock plate blank. This is a routine operation in the art. The moisture content of the above-mentioned rock plate blank is preferably 8.5. + -. 3 wt%.
The compression molding method includes but is not limited to dry compression molding. The technological parameters of the press forming can be adaptively adjusted according to actual requirements. For example, the pressure of the press is 360-380bar, and the molding times are 1.65/min.
And drying the green body. Drying in a drying kiln may be used. In some embodiments, the drying time is 50 to 60 minutes, and the moisture of the dried blank is controlled within 0.1 to 0.5 wt%.
And applying base glaze on the surface of the dried blank to cover the base color and flaws of the blank, enhance the surface decoration effect and play a role in whitening. The composition of the ground coat is not limited, and the ground coat commonly used in the field can be adopted. Conventional zirconium white glaze may also be used in the present invention, although zirconium silicate is costly and highly radioactive. The invention preferably adopts the ground glaze of a high-silicon high-aluminum system. The chemical composition of the ground glaze comprises: by mass percent, SiO2：56-60%、Al2O3: 28-30%, alkaline earth metal oxide: 2.1-3.3%, alkali metal oxide: 7.0 to 9.5 percent. In some embodiments, the chemical composition of the ground glaze comprises: by mass percent, SiO2：56-60%、Al2O3：28-30%、CaO：2.0-3.0%、MgO：0.1-0.3%、K2O：4.0-5.5%、Na2O: 3.0 to 4.0 percent. The ground glaze with the chemical composition has high whiteness, strong refractoriness and high-temperature viscosity, can avoid the body from generating miliaria, and can prevent the gas from being difficult to remove to form the defects of pinholes, bubbles and the like. As an example, the chemical composition of the ground glaze comprises: loss on ignition by mass percent: 2.0-3.5% of SiO2：56-60%、Al2O3：28-30%、Fe2O3：0.2-0.3%、TiO2：0.03-0.05%、CaO：2.0-3.0%、MgO：0.1-0.3%、K2O：4.0-5.5%、Na2O：3.0-4.0%。
In practical application, the pigment can be added into the ground coat according to the requirement to enrich the decoration. Of course, sodium tripolyphosphate or sodium carboxymethyl cellulose and other auxiliary agents can also be added in the preparation process to adjust the suspension property of the slurry and the like. The requirement of the ground coat on the fineness is that the screen residue of the ground coat passing through a 325-mesh screen is 0.5-0.8 wt%.
The ground coat may be applied by spraying. In some embodiments, the ground glaze has a specific gravity of 1.40 to 1.45g/cm3The glazing amount is 450-2. If the application amount of the ground glaze is too low, the ground color and the flaws of the blank cannot be covered, and pinholes and bubbles are easy to appear on the glaze layer; if the application amount of the ground coat is too high, the kiln entry moisture of the green body is too high, so that the moisture removal rate is too fast to cause the green body to crack.
The ground glaze of the over-high silicon low aluminum system is used in the development process. The ground glaze comprises the following chemical components: loss on ignition by mass percent: 2.0-3.5% of SiO2：70-75%、Al2O3：18-22%、Fe2O3：0.2-0.3%、TiO2：0.03-0.05%、CaO：2.0-3.0%、MgO：0.1-0.3%、K2O：3.0-4.5%、Na2O: 3.0 to 4.0 percent; the sum of the mass percentages of the chemical compositions of the ground coat is 100 percent. The high silica content is introduced by free quartz. Because a large amount of free quartz in the formula is not melted, prickly heat and pinholes appear on the glaze.
Before applying the base coat on the surface of the green body, the green body can be polished by a green body polishing machine, dried in a drying kiln, and swept after being taken out of the drying kiln.
And (4) carrying out ink-jet printing on the surface of the blank body after the ground coat is applied. The texture and the color of the effect pattern are adaptively changed according to the layout.
And applying an isolation glaze on the surface of the blank after the pattern with the effect is printed by ink jet. The isolation glaze can protect the ink-jet printing effect pattern and avoid pattern frosting. The chemical composition of the isolation glaze comprises: by mass percent, SiO2：48-50%、Al2O3：10-13%、TiO2：1.0-2.0%, alkaline earth metal oxide: 15-19%, alkali metal oxide: 4.5-7.5%, ZnO: 5.0 to 6.0 percent. The isolation glaze of the high-silicon low-aluminum system is beneficial to the formation of a white polycrystalline effect. Too high an alumina content of the barrier glaze results in an excess of glass phase with high melting temperature, so that the resulting polycrystallites are re-dissolved. Meanwhile, the viscosity of the silicon oxide is high, and the high-content silicon oxide can be used as a glass network former to promote glomerocryst. The initial melting temperature of the isolation glaze is 1000-1050 ℃. In some embodiments, the chemical composition of the release glaze includes: by mass percent, SiO2：48-50%、Al2O3：10-13%、TiO2：1.0-2.0%、CaO：11-13%、MgO：4.0-6.0%、K2O：2.0-3.0%、Na2O: 2.5-4.5%, ZnO: 5.0 to 6.0 percent. As an example, the chemical composition of the release glaze includes: loss on ignition by mass percent: 7.5-8.5% of SiO2：48-50%、Al2O3：10-13%、Fe2O3：0.1-0.4%、TiO2：1.0-2.0%、CaO：11-13%、MgO：4.0-6.0%、K2O：2.0-3.0%、Na2O：2.5-4.5%、ZnO：5.0-6.0%。
The release glaze may be applied by spraying glaze. Preferably by thin glaze spraying. The specific gravity of the isolation glaze is 1.35-1.40g/cm3The glazing amount is 200-2. If the application amount of the isolation glaze is too low, the defects of a glaze pit, glaze shrinkage and the like easily appear on the surface of the brick; if the application amount of the isolation glaze is too high, white polycrystalline is dissolved, and the polycrystalline effect cannot be achieved. The way of pouring glaze is not suitable for the application of the barrier glaze, since bell jar or straight line pouring glaze is usually used for the application of large amounts of glaze. It has also been found that omitting the use of a barrier glaze results in an oily inkjet ink and an aqueous clear glaze that are not smooth due to physical repulsion causing the glaze to be displaced, which also affects the appearance of white polycrystalline effect. The chemical composition and glazing parameters of the isolation glaze disclosed by the invention are verified by special design and experiments, and can be matched with the composition of white polycrystalline dry particles and transparent glaze, so that the improvement of the glaze quality of a product is facilitated.
And (4) positioning and applying white polycrystalline dry particles on the surface of the blank body after the isolation glaze is applied. The white polycrystalline dry granulesThe chemical composition of (a) may include: by mass percent, SiO2：41-45%、Al2O3: 13-15%, alkaline earth metal oxide: 24-29.5%, alkali metal oxide: 3.5-6.0% of ZrO2: 6.0-7.0%, F: 2.5 to 3 percent. Zirconia and fluorine are introduced into the chemical composition of the white polycrystalline dry particles as crystal nucleus agents, most of the crystal nuclei are melted away in the high-temperature sintering process, and a small amount of crystal nuclei left in the cooling process are used as growth centers to form the white polycrystalline. The initial melting temperature of the white polycrystalline dry particles is 1050-. The initial melting temperature of the white polycrystalline dry granules should be higher than the initial melting temperature of the insulating glaze. The reason is that if the initial melting temperature of the white polycrystalline dry grains is lower than that of the isolating glaze, pinholes and miliaria can be caused on the brick surface. Preferably, the initial melting temperature difference between the white polycrystalline dry particles and the isolation glaze is controlled to be 50-100 ℃. If the difference between the onset temperatures of the white polycrystalline dry particles and the insulating glaze is less than 50 ℃, surface pits can be caused and the white polycrystalline effect is not generated.
In some embodiments, the chemical composition of the white polycrystalline dry grains comprises: by mass percent, SiO2：41-45%、Al2O3：13-15%、CaO：14-17%、MgO：5.0-6.5%、K2O：1.0-2.0%、Na2O：2.5-4.0%、ZrO2: 6.0-7.0%, BaO: 5.0-6.0%, F: 2.5 to 3 percent. As an example, the chemical composition of the white polycrystalline dry grains includes: loss on ignition by mass percent: 1.0-2.0% of SiO2：41-45%、Al2O3：13-15%、Fe2O3：0.01-0.05%、TiO2：0.05-0.2%、CaO：14-17%、MgO：5.0-6.5%、K2O：1.0-2.0%、Na2O：2.5-4.0%、ZrO2：6.0-7.0%、BaO：5.0-6.0%、F：2.5-3%。
The mineral composition of the white polycrystalline dry grains comprises: by mass percentage, 30-35% of albite, 10-13% of potash feldspar, 4-6% of fluorite, 20-25% of dolomite, 3-5% of calcite, 7-8% of barium carbonate, 7-9% of zircon powder and 8-12% of burnt soil. It is stated that the raw material composition of the crystal flower dry grain glaze disclosed in chinese patent CN 110845227a includes: by mass percent, potassium feldspar: 6-10%, albite: 47-51%, quartz: 3.5-5.5%, alumina: 2.5-4.5%, dolomite: 18.0-22.0%, barium carbonate: 2-6%, zinc oxide 4-6%, fluorite 3-5%, calcium phosphate: 1.0 to 1.5 percent. The white polycrystalline dry grain glaze and the crystal flower dry grain glaze belong to different formula systems. The white polycrystalline dry particles mainly take fluorite and zircon powder as crystal nuclei, and the formation of white polycrystalline is promoted by the isolation glaze with proper composition. The crystal flower dry grain glaze depends on the better high-temperature fluidity of the crystal flower dry grain glaze in the firing process and provides chemical components corresponding to the crystal flowers so as to grow the crystal flowers.
The grain size of the white polycrystalline dry grains is 40-150 meshes. The grain size is too fine, so that the white polycrystalline effect is not obvious; too large a particle size may affect the aesthetic appearance of the decoration.
The application amount of the white polycrystalline dry particles is 400-600g/m2. The application amount of the white polycrystalline dry particles is too low, so that the crystal pattern effect is poor; if the white polycrystalline dry grains are applied in too high an amount, the small white spots which cause opaqueness accumulate in an excessive amount, causing the inkjet pattern to be unclear.
The white polycrystalline dry particles are granular, so that the white polycrystalline dry particles can be positioned and distributed according to decoration requirements. The manner of positioning the whitish polycrystalline dry granules is not limited. For example, the method of spraying the positioning glue and then distributing the dry grains is adopted, and the dry grains at the positions where the glue is not sprayed are recovered subsequently, so that the effect of positioning the white polycrystalline dry grains on the cloth is realized. And (3) printing glue on the surface of the blank body in a positioning manner by using a digital glue printer, and then distributing white polycrystalline dry granules by using a dry granule machine. And after the white polycrystalline dry granules are coated, removing the dry granules which are not adhered by the glue. The non-adhered dry pellets can be removed by a blower. The gray level of the glue can affect the adhesion amount of the dry particles. The glue gray scale can be adjusted according to the actual effect. If the gray level of the glue is less than 20%, the dry particles are not firmly adhered, and the phenomenon that the dry particles are pumped away easily occurs. The glue can be printed through double-channel digital codes. The gray level superposition value of the glue with two channels is preferably controlled to be 80-100%.
And applying transparent glaze on the surface of the blank body coated with the white polycrystalline dry particles. The chemical composition of the transparent glaze comprises: by mass percent, SiO2：55-60%、Al2O3: 15-18%, alkaline earth metal oxide: 13-17%, alkali metal oxide: 5.5-8.0%, ZnO: 5.0 to 6.0 percent. The melting starting temperature of the transparent glaze is 1050℃ and 1100 DEG CThe white polycrystalline is prevented from being dissolved. In some embodiments, the chemical composition of the transparent glaze comprises: loss on ignition by mass percent: 0.5-1.5% of SiO2：55-60%、Al2O3：15-18%、Fe2O3：0.1-0.2%、TiO2：0.1-0.2%、CaO：7.0-9.0%、MgO：5.0-6.0%、K2O：3.0-5.0%、Na2O: 2.5-3.0%, ZnO: 5.0-6.0%, SrO: 1.0-2.0%. For example, the chemical composition of the transparent glaze includes: loss on ignition by mass percent: 0.5% of SiO2：55%、Al2O3：15%、Fe2O3：0.1%、TiO2：0.1%、CaO：8.0%、MgO：5.0%、K2O：3.0%、Na2O：2.5%、ZnO：5.0%、SrO：2.0%。
The application mode of the transparent glaze is glaze pouring. The white polycrystalline dry particles are further fixed by the glass phase formed by melting the transparent glaze in a high-temperature sintering environment, the transparency of the glaze is increased, and the part of the white polycrystalline formed by stacking the crystal patterns can even form a line effect. After the white polycrystalline dry grains are melted, the dry grains are not completely melted with the transparent glaze in the firing process due to low high-temperature viscosity, and are re-agglomerated to form mutual adhesion and build to form white small crystal flowers when cooled.
The specific gravity of the transparent glaze is 1.55-1.58g/cm3The glazing amount is 1160-1170g/m2. The glazing amount of the transparent glaze is too low to completely cover the white polycrystalline dry particles which are laid and positioned. Too high an amount of clear glaze may affect the stability of the glaze layer, including reducing the strength of the body leading to chipping of the tile and destruction of the tile shape.
And drying the green body after the transparent glaze is applied, and sintering the green body in a kiln to obtain the white polycrystalline dry-grain ceramic rock plate. The maximum firing temperature is 1180-1220 ℃, and the firing time is 60-90 minutes. As an example, the maximum firing temperature was 1220 ℃ and the firing time was 80 minutes.
And polishing after firing. And certainly, super-clean wax water can be sprayed on the surface of the polished rock plate so as to enable the surface glossiness of the ceramic plate surface to reach more than 95 degrees.
The white polycrystalline dry-grain ceramic rock plate disclosed by the invention forms white crystal flowers with different shapes on the surface of the brick, and is matched with appropriate and colorful ink-jet patterns to form a rock plate product with a special crystal flower effect and strong stereoscopic impression. Compared with the common ink-jet natural surface ceramic rock plate, the white polycrystalline dry particle ceramic rock plate has good crystal flower decoration effect, the polished surface of the rock plate is transparent, and particularly, patterns in light gray, beige and other color systems are matched, so that a better decoration effect can be obtained.
In addition, the white polycrystalline dry-particle ceramic rock plate has wide application range, is not influenced by environmental factors, and can be widely applied to the decoration of household desktop panels of various interior walls, grounds and background walls; the water absorption rate of the completely sintered rock plate is controlled within 0.1wt%, and the polished rock plate is treated by polishing ultra-clean wax water, so that the rock plate has a good antifouling effect, high glossiness and easy cleaning; durable, stable performance, little influence factor of time and environment, high wear resistance, long service life and wide market economic benefit, and can keep new feeling for a long time.
The present invention will be described in further detail with reference to examples. It is also to be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the invention, and that certain insubstantial modifications and adaptations of the invention by those skilled in the art may be made in light of the above teachings. The specific process parameters and the like of the following examples are also only one example of suitable ranges, i.e., those skilled in the art can select the appropriate ranges through the description herein, and are not limited to the specific values exemplified below.
Example 1
The preparation method of the white polycrystalline dry-grain ceramic rock plate comprises the following steps:
step 1, pressing and forming a rock plate blank to obtain a blank body of the ceramic rock plate;
step 2, applying base glaze on the surface of the blank; the chemical composition of the ground glaze comprises: loss on ignition by mass percent: 2.0% of SiO2：56%、Al2O3：28%、Fe2O3：0.2%、TiO2：0.03%、CaO：2.0%、MgO：0.1%、K2O：4.0%、Na2O: 3.0 percent; the application mode of the ground glaze is glaze spraying; the specific gravity of the ground glaze is 1.43 g-cm3The glazing amount is 450 g/m2；
Step 3, ink-jet printing an effect pattern on the surface of the blank body after the ground coat is applied;
step 4, applying an isolation glaze on the surface of the blank after the pattern with the effect is printed by ink jet; the chemical composition of the isolation glaze comprises: loss on ignition by mass percent: 7.5% of SiO2：48%、Al2O3：10%、Fe2O3：0.1%、TiO2：1.0%、CaO：11%、MgO：4.0%、K2O：2.0%、Na2O: 2.5%, ZnO: 5.0 percent; the application mode of the isolation glaze is glaze spraying; the specific gravity of the isolation glaze is 1.35 g/cm3The glazing amount is 220g/m2；
Step 5, positioning and applying white polycrystalline dry particles on the surface of the blank body after the isolation glaze is applied; the chemical composition of the white polycrystalline dry grains comprises: loss on ignition by mass percent: 1.0% SiO2：41%、Al2O3：13%、Fe2O3：0.01%、TiO2：0.05%、CaO：14%、MgO：5.0%、K2O：1.0%、Na2O：2.5%、ZrO2: 6.0%, BaO: 5.0%, F: 2.5 percent; the application amount of the white polycrystalline dry granules is 400g/m2；
Step 6, applying transparent glaze on the surface of the blank body after the white polycrystalline dry particles are applied in a positioning way; the chemical composition of the transparent glaze comprises: loss on ignition by mass percent: 0.5% of SiO2：55%、Al2O3：15%、Fe2O3：0.1%、TiO2：0.1%、CaO：8.0%、MgO：5.0%、K2O：3.0%、Na2O: 2.5%, ZnO: 5.0%, SrO: 2.0 percent; the application mode of the transparent glaze is glaze pouring; the specific gravity of the transparent glaze is 1.55 g/cm3The glazing amount is 1160g/m2；
Step 7, drying the green body after the transparent glaze is applied and sintering the green body in a kiln to obtain a white polycrystalline dry-grain ceramic rock plate; the maximum firing temperature of the kiln is 1220 ℃, and the firing time is 80 minutes.
Fig. 1 shows the brick effect of a white polycrystalline dry-grained ceramic rock slab. It can be seen that the white polycrystalline dry-grain ceramic rock plate forms white crystal flowers gathered on the brick surface, and can better reduce the stone and the polycrystalline effect. Moreover, the radioactivity of the product meets the national standard.
Comparative example 1
Essentially the same as in example 1, except that: step 4 is omitted.
The surface of the rock plate sintered by the comparative example has no white polycrystalline effect. This is because, if the isolation glaze is omitted, the white polycrystalline dry particles and the transparent glaze are in direct contact with the inkjet printing effect pattern, and the ink used for inkjet printing is composed of high-temperature stable color-developing particles, which is not favorable for the white polycrystalline dry particles and the transparent glaze to flow at a lower temperature, so that the white polycrystalline effect cannot be realized.
Comparative example 2
Essentially the same as in example 1, except that: the application amount of the white polycrystalline dry granules is 200 g/m2。
After the application amount of the white polycrystalline dry grains is reduced, the surface of the rock plate after sintering has no white polycrystalline effect, because the small amount of the white polycrystalline dry grains cannot generate crystal forming substances in a supersaturated state due to crystallization, and crystal nuclei are difficult to form.
Comparative example 3
Essentially the same as example 1, except that: the chemical composition of the isolation glaze comprises: by mass percent, SiO2：48-50%；Al2O3：18-20%；TiO2：1.0-2.0%；CaO：11-13%；MgO：2.0-4.0%；K2O：2.0-3.0%；Na2O：2.5-4.5%；ZnO：5.0-6.0%。
The surface of the rock plate sintered by the comparative example has no white polycrystalline effect. The alumina content of the isolation glaze is high, so that precipitated crystals are dissolved and cannot be accumulated to form white polycrystalline.
Comparative example 4
Essentially the same as in example 1, except that: the chemical composition of the white polycrystalline dry grains comprises: loss on ignition by mass percent: 1.0-2.0% of SiO2：43-48%、Al2O3：16-17%、Fe2O3：0.01-0.05%、TiO2：0.05-0.2%、CaO：12-14%、MgO：4.0-5.5%、K2O：1.0-2.0%、Na2O：2.5-4.0%、ZrO2：6.0-7.0%、BaO：4.0-5.0%、F：2.5-3%。
The white polycrystalline dry grain of the comparative example improves Al2O3The content of CaO and MgO is reduced, so that white polycrystalline dry grains have high-temperature viscosity and are difficult to form white polycrystalline.
Claims (10)
1. A preparation method of a white polycrystalline dry-grain ceramic rock plate is characterized by comprising the following steps:
applying base coat on the surface of the blank; printing an effect pattern on the surface of the blank body after the ground coat is applied by ink jet; applying an isolation glaze on the surface of the blank after the pattern with the effect is printed by ink jet, wherein the initial melting temperature of the isolation glaze is 1000-1050 ℃; the chemical composition of the isolation glaze comprises: by mass percent, SiO2：48-50%、Al2O3：10-13%、TiO2: 1.0-2.0%, alkaline earth metal oxide: 15-19%, alkali metal oxide: 4.5-7.5%, ZnO: 5.0 to 6.0 percent; positioning and applying white polycrystalline dry particles on the surface of the blank body after the isolation glaze is applied, wherein the initial melting temperature of the white polycrystalline dry particles is 1050-1100 ℃, and the initial melting temperature of the white polycrystalline dry particles is higher than that of the isolation glaze by 50-100 ℃; the chemical composition of the white polycrystalline dry grains comprises: by mass percent, SiO2：41-45%、Al2O3: 13-15%, alkaline earth metal oxide: 24-29.5%, alkali metal oxide: 3.5-6.0% of ZrO2: 6.0-7.0%, F: 2.5 to 3 percent; applying transparent glaze on the surface of the blank body coated with the white polycrystalline dry particles; and firing and polishing the blank body after the transparent glaze is applied in a kiln to obtain the white polycrystalline dry-grain ceramic rock plate.
2. The method of claim 1, wherein the mineral composition of the white polycrystalline dry grains comprises: 30-35% of albite, 10-13% of potash feldspar, 4-6% of fluorite, 20-25% of dolomite, 3-5% of calcite, 7-8% of barium carbonate, 7-9% of zircon powder and 8-12% of calcined soil.
3. The method as claimed in claim 1, wherein the application amount of the white polycrystalline dry granules is 400-600g/m2。
4. The method of claim 1, wherein the white polycrystalline dry grains have a grain size of 40-150 mesh.
5. The method according to claim 1, characterized in that the release glaze is applied by spraying; the specific gravity of the isolation glaze is 1.35-1.40g/cm3The glazing amount is 200-2。
6. The method according to claim 1, characterized in that the chemical composition of the transparent glaze comprises: by mass percent, SiO2：55-60%、Al2O3: 15-18%, alkaline earth metal oxide: 13-17%, alkali metal oxide: 5.5-8.0%, ZnO: 5.0 to 6.0 percent.
7. The preparation method according to claim 1, wherein the transparent glaze is applied by way of pouring glaze; the specific gravity of the transparent glaze is 1.55-1.58g/cm3The glazing amount is 1160-1170g/m2。
8. The method according to claim 1, characterized in that the chemical composition of the under-glaze comprises: by mass percent, SiO2：56-60%、Al2O3: 28-30%, alkaline earth metal oxide: 2.1-3.3%, alkali metal oxide: 7.0 to 9.5 percent.
9. The method as claimed in claim 1, wherein the maximum firing temperature is 1180-1220 ℃ and the firing time is 60-90 minutes.
10. A white polycrystalline dry-grained ceramic rock plate obtained by the method of preparation according to any one of claims 1 to 9.
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