CN108892490B - Green body for enhancing bonding strength of paving and pasting ceramic tile and preparation method thereof - Google Patents

Green body for enhancing bonding strength of paving and pasting ceramic tile and preparation method thereof Download PDF

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CN108892490B
CN108892490B CN201810721240.9A CN201810721240A CN108892490B CN 108892490 B CN108892490 B CN 108892490B CN 201810721240 A CN201810721240 A CN 201810721240A CN 108892490 B CN108892490 B CN 108892490B
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bottom layer
surface layer
layer
bonding strength
green body
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CN108892490A (en
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马超
柯善军
田维
吴洋
倪成林
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GUANGXI OUSHENNUO CERAMIC Co.,Ltd.
Foshan Oceano Ceramics Co Ltd
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Guangxi Oushennuo Ceramic Co ltd
Foshan Oceano Ceramics Co Ltd
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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Abstract

The invention discloses a green body for enhancing the paving and bonding strength of a porcelain tile. The green body comprises a surface layer and a bottom layer, wherein the surface layer is a compact structure porcelain layer, the bottom layer is a loose structure porcelain layer or a ceramic layer, and the water absorption rate of the bottom layer is higher than 0.5%. The double-layer structure blank surface layer comprises the following chemical components in percentage by mass: 60% -70% SiO2，18％～25％Al2O3，1.5％～2.5％Fe2O3+TiO2，0.6％～1.5％CaO+MgO，2％～5％K2O+Na2And O. The double-layer structure blank bottom layer comprises the following chemical components in percentage by mass: 45 to 60 percent of SiO2 and 41 to 45 percent of Al2O3，2.0％～3.5％Fe2O3+TiO2，0.5％～1.0％CaO+MgO，2％～5％K2O+Na2And O. The invention also discloses a preparation method of the green body for enhancing the paving and bonding strength of the porcelain tile. According to the invention, through the high water absorption of the bottom layer of the blank body, the bonding strength of the ceramic tile and cement mortar is increased, and the risk of hollowing and falling of the ceramic tile is effectively reduced.

Description

Green body for enhancing bonding strength of paving and pasting ceramic tile and preparation method thereof
Technical Field
The invention belongs to the field of building ceramics, and particularly relates to a green body for enhancing the bonding strength of paving and pasting of a porcelain tile and a preparation method thereof.
Background
The hollowing phenomenon is always a common quality problem of the ceramic tiles in the process of paving, pasting and using, and potential safety hazards generated by the hollowing phenomenon greatly limit the application range of the ceramic tiles. On one hand, the hollowing ceramic tile is easy to tilt or fall off in use, and the decorative effect is affected; on the other hand, when the hollowing phenomenon occurs in water-using areas such as balconies, kitchens, bathrooms and the like, accumulated water is easily formed at the hollowing position to generate stink, and the living experience is seriously influenced. The insufficient bonding strength between the ceramic tile and the binder mainly made of cement mortar is one of the reasons for causing hollowing. In order to improve the strength of ceramic tiles and adhesives, the ceramic tile adhesive is a commonly used mode, but the cost of the ceramic tile adhesive is often several times that of common mortar, and the construction cost is higher. The Chinese invention patent CN107129308A discloses a hollow-out falling-proof ceramic tile adobe and a preparation method and application thereof, which adopts a layered distribution mode to distribute powder containing an in-situ pore-forming agent on a bottom layer, so that the bottom layer forms a larger pore structure, and the occurrence of the hollow-out phenomenon is reduced by increasing the contact area of the ceramic tile and a binder and the pinning effect. However, through the research on the bonding strength between the ceramic tile and the adhesive, the water absorption rate is a very important factor influencing the bonding strength. The water absorption of the ceramic tile is controlled to a certain extent, and the risk of hollowing of the ceramic tile can be effectively reduced, so that the water absorption of the bottom layer blank body can be improved, and the paving and bonding strength of the ceramic tile can be enhanced. However, in the case of ceramic tiles, the national standard specifies the water absorption and strength of the entire tile, and therefore the water absorption and thickness of the bottom layer are appropriately controlled. Meanwhile, the blanks with different material properties are easy to deform in the sintering and cooling and storage processes, so that the composition matching of the bottom layer blank and the surface layer blank is considered.
Disclosure of Invention
The invention aims to provide a blank for enhancing the bonding strength of paving and pasting of ceramic tiles and a preparation method thereof aiming at the defects of the prior art.
The technical scheme adopted by the invention is as follows: a body for enhancing the paving and bonding strength of ceramic tiles is characterized in that the body sequentially comprises a surface layer and a bottom layer from top to bottom, wherein the bottom layer is a loose-structure stoneware layer or a ceramic layer, and the water absorption rate of the surface layer is lower than 0.5%; the water absorption of the bottom layer is higher than 0.5%, the difference between the drying shrinkage rates of the surface layer and the bottom layer is less than 0.2%, the difference between the sintering shrinkage rates of the surface layer and the bottom layer is less than 0.2%, and the chemical components and the mass percentages of the bottom layer are as follows:
Figure GDA0002603103400000021
further, the bottom layer comprises the following raw materials in percentage by mass:
Figure GDA0002603103400000022
further, the surface layer comprises the following chemical components in percentage by mass:
Figure GDA0002603103400000023
further, the surface layer comprises the following raw materials in percentage by mass:
Figure GDA0002603103400000024
furthermore, the water absorption of the surface layer is lower than 0.5%, and the water absorption of the surface layer is lower than 0.5%, so that the waterproof performance of the whole brick is improved.
Further, the difference of the drying shrinkage rates of the surface layer and the bottom layer is less than 0.2%; the difference of the drying shrinkage rates of the surface layer and the bottom layer is less than 0.2%, so that the shrinkage rates of the surface layer and the bottom layer are kept consistent in the drying process, and the shape of the whole brick is not easy to deform in the drying process.
Furthermore, the difference of the firing shrinkage rates of the surface layer and the bottom layer is less than 0.2%, so that the difference of the firing shrinkage rates of the surface layer and the bottom layer is less than 0.2%, the shrinkage of the surface layer and the bottom layer in the firing process is kept consistent, and the shape of the whole brick is not easy to deform in the drying process.
A method for preparing a green body for enhancing the paving bonding strength of a porcelain tile comprises the following steps:
(1) respectively weighing the raw materials of the surface layer or the bottom layer according to the raw material ratio, adding a proper amount of water, respectively ball-milling, and then sieving to remove iron to respectively obtain surface layer slurry and bottom layer slurry;
(2) respectively aging the surface layer slurry and the bottom layer slurry obtained in the step (1) and then performing spray granulation to respectively obtain surface layer powder and bottom layer powder;
(3) performing secondary material distribution on the surface layer powder and the bottom layer powder in the step (2) in a positive beating mode, controlling the thickness of the bottom layer of the blank body, and performing dry pressing to obtain the blank body with a double-layer structure;
(4) drying the green body obtained in the step (3) in a drying kiln;
(5) carrying out base glaze pouring, ink-jet printing, glaze pouring and polishing, drying in front of a kiln on the blank dried in the step (4), and firing in a firing kiln to obtain a semi-finished product of the ceramic tile;
(6) and (5) polishing, edging and waxing the semi-finished product in the step (5) to obtain a final product.
Further, in the step (1), the water content of the surface layer slurry and the bottom layer slurry is 60% -65%, the ball milling time is 6-8 hours, the residue of the surface layer slurry and the bottom layer slurry after passing through a 250-mesh screen is 0.8% -1.0%, and the flow rate of the slurry is 30-70 seconds.
Further, in the step (2), the ageing time of the surface layer slurry and the bottom layer slurry is 6-12 hours, the water content of the surface layer powder and the bottom layer powder is 7% -9%, the sieving residue of the surface layer powder and the bottom layer powder after sieving through a 100-mesh sieve is less than 5%, the sieving residue of the surface layer powder and the bottom layer powder after sieving through a 40-mesh sieve is 30-50%, and the sieving residue of the surface layer powder and the bottom layer powder after sieving through a 20-mesh sieve is less than 1%.
Further, in the step (3), the thickness of the bottom layer of the green body is controlled to be 10% -20% of the thickness of the whole green brick; by controlling the thickness of the bottom layer of the blank body, the influence of a thinner bottom layer on the strength of the whole brick is smaller.
Further, in the step (4), the drying temperature is 160-180 ℃, and the drying time is 40-60 minutes.
Further, in the step (5), the highest surface temperature of the firing system is 1180-1210 ℃, the highest bottom temperature of the firing system is 1210-1230 ℃, and the firing time is 55-65 minutes.
The invention has the beneficial effects that: the green body is of a double-layer structure, the surface layer and the bottom layer are sequentially arranged from top to bottom, and the chemical component proportion of the bottom layer is optimized, so that the bottom layer forms a stoneware layer or a ceramic layer with a loose structure, the water absorption of the bottom layer is higher than 0.5%, the water absorption of the green body bottom layer is improved, the bonding strength of the ceramic tile and cement mortar is enhanced, and the hollowing and falling risk of the ceramic tile is effectively reduced; the double-layer structure ceramic tile prepared by the invention can be used in combination with common cement mortar, and has lower cost compared with methods such as ceramic tile glue paving and pasting.
Compared with the prior art that the bottom layer adopts the pore-forming agent, the invention has the advantages of simple preparation method, no need of adding the pore-forming agent, and avoiding the influence on the appearance of the whole brick due to the easy exposure of the porous structure on the side surface of the bottom layer prepared by the pore-forming agent.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below, so that the objects, the features, and the effects of the present invention can be fully understood. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Example 1
A green body for enhancing the bonding strength of paving and pasting a porcelain tile comprises the following raw materials in percentage by mass: 60% of mixed sand of potassium feldspar, albite and quartz, 25% of clay, 15% of bauxite, 0.15% of sodium tripolyphosphate and 0.25% of sodium methylcellulose. The chemical composition of the surface layer is as follows by mass percent: 68% SiO2，20％Al2O3，1.5％Fe2O3+TiO2，1.0％CaO+MgO，5％K2O+Na2O, loss on ignition 4.5%. The bottom layer comprises the following raw materials in percentage by mass: 30% of mixed sand of potassium feldspar, albite and quartz, 20% of clay, 50% of bauxite, 0.15% of sodium tripolyphosphate and 0.25% of sodium methyl cellulose. The chemical composition of the bottom layer is as follows by mass percent: 50% SiO2，41％Al2O3，2.5％Fe2O3+TiO2，1.0％CaO+MgO，3.5％K2O+Na2O, loss on ignition of 3%.
(1) Respectively weighing raw materials of a surface layer or a bottom layer according to a formula composition ratio, adding a proper amount of water with the water content of 65%, respectively carrying out ball milling for 8 hours, sieving the obtained slurry to remove iron to respectively obtain slurry of the surface layer and the bottom layer, wherein the 250-mesh screen residue of the slurry is between 0.8 and 1.0 percent, and the flow rate of the slurry is between 30 and 70 seconds;
(2) ageing the slurry obtained in the step (1) for 6 hours, and then performing spray granulation to obtain surface layer powder and bottom layer powder with the water content of 7%, wherein the fineness is as follows: the residue on the 100-mesh sieve is less than 5 percent, the residue on the 40-mesh sieve is 30-50 percent, and the residue on the 20-mesh sieve is less than 1 percent;
(3) performing secondary material distribution on the powder in the step (2) in a positive beating mode, controlling the thickness of the bottom layer to be 10% of the thickness of the whole green brick, and performing dry pressing forming to obtain a green body with a double-layer structure;
(4) drying the blank body in the step (3) in a drying kiln for 60 minutes at 160 ℃;
(5) carrying out surface glaze spraying, ink-jet printing, glaze spraying and polishing, drying in front of a kiln on the blank in the step (4), and firing in a firing kiln, wherein the highest surface temperature of a firing system is 1180 ℃, the highest bottom temperature range is 1210 ℃, and the firing time is 55 minutes to obtain a semi-finished product of the ceramic tile;
(6) and (5) polishing, edging and waxing the semi-finished product in the step (5) to obtain a final product.
Example 2
A green body for enhancing the bonding strength of paving and pasting a porcelain tile comprises the following raw materials in percentage by mass: 59% of mixed sand of potassium feldspar, albite and quartz, 25% of clay, 16% of bauxite, 0.15% of sodium tripolyphosphate and 0.25% of sodium methylcellulose. Of a facing layerThe chemical composition comprises the following components in percentage by mass: 67% SiO2，21％Al2O3，1.5％Fe2O3+TiO2，1.5％CaO+MgO，5％K2O+Na2O, loss on ignition 4%. The bottom layer comprises the following raw materials in percentage by mass: 28 percent of mixed sand of potassium feldspar, albite and quartz, 19 percent of clay, 53 percent of bauxite, 0.15 percent of sodium tripolyphosphate and 0.25 percent of sodium methyl cellulose. The chemical composition of the bottom layer is as follows by mass percent: 48% SiO2，42％Al2O3，2.3％Fe2O3+TiO2，1.7％CaO+MgO，3％K2O+Na2O, loss on ignition of 3%.
(1) Respectively weighing raw materials of a surface layer or a bottom layer according to a formula composition ratio, adding a proper amount of water with the water content of 60%, ball-milling for 6 hours respectively, sieving the obtained slurry to remove iron to obtain slurry of the surface layer and the bottom layer respectively, wherein the 250-mesh screen residue of the slurry is between 0.8 and 1.0 percent, and the flow rate of the slurry is between 30 and 70 seconds;
(2) ageing the slurry obtained in the step (1) for 12 hours, and then performing spray granulation to obtain surface layer powder and bottom layer powder with the water content of 9%, wherein the fineness is as follows: the residue on the 100-mesh sieve is less than 5 percent, the residue on the 40-mesh sieve is 30-50 percent, and the residue on the 20-mesh sieve is less than 1 percent;
(3) performing secondary material distribution on the powder in the step (2) in a positive beating mode, controlling the thickness of the bottom layer to be 20% of the thickness of the whole green brick, and performing dry pressing forming to obtain a green body with a double-layer structure;
(4) drying the blank body in the step (3) in a drying kiln for 40 minutes at 180 ℃;
(5) carrying out surface glaze spraying, ink-jet printing, glaze spraying and polishing, drying in front of a kiln on the blank in the step (4), and firing in a firing kiln, wherein the highest surface temperature of a firing system is 1210 ℃, the highest bottom temperature of the firing system is 1230 ℃, and the firing time is 65 minutes to obtain a semi-finished product of the ceramic tile;
(6) and (5) polishing, edging and waxing the semi-finished product in the step (5) to obtain a final product.
And (3) testing the bonding strength: cutting the prepared brick into test blocks of 75mm multiplied by 75mm for later use according to standard sand: the mortar was prepared by mixing 325 cement and water at a ratio of 3: 2: 1, applied to the bottom of the test block, and tested for 28 days pull strength. The relevant properties of example 1 and example 2 were tested as follows:
test specimen Water absorption rate Drawing strength
Comparison sample (common brick) 0.06％ 0.30MPa
Example 1 0.20％ 0.42MPa
Example 2 0.35％ 0.48MPa
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.

Claims (8)

1. A body for enhancing the paving and bonding strength of ceramic tiles is characterized in that the body sequentially comprises a surface layer and a bottom layer from top to bottom, wherein the bottom layer is a loose-structure stoneware layer or a ceramic layer, and the water absorption rate of the surface layer is lower than 0.5%; the water absorption rate of the bottom layer is higher than 0.5%, the thickness of the bottom layer accounts for 10% -20% of the thickness of the whole blank, the difference of the drying shrinkage rates of the surface layer and the bottom layer is less than 0.2%, the difference of the sintering shrinkage rates of the surface layer and the bottom layer is less than 0.2%, and the chemical components and the mass percentages of the bottom layer are as follows:
Figure FDA0003181309280000011
the surface layer comprises the following chemical components in percentage by mass:
Figure FDA0003181309280000012
2. the blank for enhancing the paving bonding strength of the porcelain tiles as claimed in claim 1, wherein the surface layer comprises the following raw materials in percentage by mass:
Figure FDA0003181309280000013
3. a preparation method of a green body for enhancing the paving and bonding strength of a porcelain tile is characterized by comprising the following steps:
(1) respectively weighing the raw materials of the surface layer or the bottom layer according to the raw material proportion of the blank body in the claim 1 or 2, adding a proper amount of water, respectively ball-milling, and then sieving to remove iron to respectively obtain surface layer slurry and bottom layer slurry;
(2) respectively aging the surface layer slurry and the bottom layer slurry obtained in the step (1) and then performing spray granulation to respectively obtain surface layer powder and bottom layer powder;
(3) performing secondary material distribution on the surface layer powder and the bottom layer powder in the step (2) in a positive beating mode, controlling the thickness of the bottom layer of the blank body, and performing dry pressing to obtain the blank body with a double-layer structure;
(4) drying the green body obtained in the step (3) in a drying kiln;
(5) carrying out base glaze pouring, ink-jet printing, glaze pouring and polishing, drying in front of a kiln on the blank dried in the step (4), and firing in a firing kiln to obtain a semi-finished product of the ceramic tile;
(6) and (5) polishing, edging and waxing the semi-finished product in the step (5) to obtain a final product.
4. The preparation method of the green body for enhancing the paving bonding strength of the porcelain tiles as claimed in claim 3, wherein in the step (1), the water content of the surface layer slurry and the bottom layer slurry is 60% -65%, the ball milling time is 6-8 hours, the screen residue of the surface layer slurry and the bottom layer slurry after passing through a 250-mesh screen is 0.8% -1.0%, and the flow rate of the slurry is 30-70 seconds.
5. The method for preparing a green body for enhancing the paving bonding strength of a porcelain tile according to claim 3, wherein in the step (2), the aging time of the surface layer slurry and the bottom layer slurry is 6-12 hours, the water content of the surface layer powder and the bottom layer powder is 7% -9%, the sieving residue of the surface layer powder and the bottom layer powder after sieving with a 100-mesh sieve is less than 5%, the sieving residue of the surface layer powder and the bottom layer powder after sieving with a 40-mesh sieve is 30-50%, and the sieving residue of the surface layer powder and the bottom layer powder after sieving with a 20-mesh sieve is less than 1%.
6. The method for preparing a green body for enhancing the paving bonding strength of ceramic tiles as claimed in claim 3, wherein the thickness of the bottom layer of the green body in the step (3) is controlled to be 10% -20% of the thickness of the whole tile blank.
7. The preparation method of the green body for enhancing the paving bonding strength of the porcelain tile according to claim 3, wherein the drying temperature in the step (4) is 160-180 ℃ and the drying time is 40-60 minutes.
8. The method for preparing the green body for enhancing the paving bonding strength of the porcelain tiles according to claim 3, wherein in the step (5), the highest surface temperature of a firing system is 1180-1210 ℃, the highest bottom temperature of the firing system is 1210-1230 ℃, and the firing time is 55-65 minutes.
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CN112624744B (en) * 2020-12-02 2023-03-31 广西欧神诺陶瓷有限公司 Ceramic tile with high bottom surface bonding strength and preparation method and application thereof
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