CN114380586A - Multifunctional ceramic pot and preparation method thereof - Google Patents
Multifunctional ceramic pot and preparation method thereof Download PDFInfo
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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
- C04B35/16—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 based on silicates other than clay
- C04B35/18—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 based on silicates other than clay rich in aluminium oxide
- C04B35/19—Alkali metal aluminosilicates, e.g. spodumene
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
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- 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
- C03C1/02—Pretreated ingredients
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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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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- 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
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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- 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
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
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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
- C03C2204/00—Glasses, glazes or enamels with special properties
- C03C2204/02—Antibacterial glass, glaze or enamel
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention provides a multifunctional ceramic pot and a preparation method thereof, belonging to the field of ceramic preparation, wherein a ceramic pot blank contains 49-51% of spodumene, and a ceramic pot glaze also contains 55-58% of spodumene, which can be irreversibly changed into high-temperature beta-spodumene after being heated at high temperature, so that the ceramic pot blank is ensured to have irreversible and low expansion coefficient when being converted at high temperature.
Description
Technical Field
The invention relates to the field of ceramic preparation, in particular to a multifunctional ceramic pot and a preparation method thereof.
Background
Ceramic foodware has been an important place in health, environmental protection and culture. The ceramic tableware generally coats glaze on the surface of a ceramic blank, the glaze is fused by roasting at a certain temperature, and when the temperature is reduced, a vitreous thin layer on the surface of the ceramic is formed, and the vitreous thin layer can increase the mechanical strength, the thermal stability and the dielectric strength and prevent the erosion of liquid and gas; in addition, the vitreous thin layer also has the functions of improving the appearance of the porcelain, facilitating the cleaning, preventing the porcelain from being stained by dust, and the like. The ceramic pot also belongs to one kind of ceramic food containers, but the ceramic pot prepared in the prior art generally has the problems of single function, poor antibacterial property and poor safety, and in the preparation process, the glaze of the ceramic pot is incompatible with the blank body of the ceramic pot, the agglomeration of components not only influences the appearance of the ceramic pot, but also influences the quality of the ceramic pot, so the integral optimization of the glaze of the ceramic pot and the preparation process has certain necessity.
In conclusion, the above problems still remain to be solved in the field of preparing ceramic pots.
Disclosure of Invention
Based on the technical scheme, the invention provides the multifunctional ceramic pot and the preparation method thereof, and the multifunctional ceramic pot aims to solve the problems of single function, poor antibacterial property and safety of the ceramic pot in the prior art, and the problems of incompatibility between a ceramic pot glaze and a ceramic pot blank, component agglomeration and influence on appearance and quality, and the specific technical scheme is as follows:
a multifunctional ceramic pot comprises a ceramic pot blank body and a ceramic pot glaze, wherein the ceramic pot blank body is prepared from 49-51% of spodumene, 25-30% of clay, 4-7% of quartz, 8-12% of alkaline earth and 1-4% of talc by mass;
the ceramic pot glaze consists of the following preparation raw materials in percentage by mass:
4-6% of nano zinc oxide, 1-2% of cerium oxide, 4-7% of tourmaline, 5-10% of fused quartz, 5-8% of calcined kaolin, 1% of ball clay, 55-58% of spodumene, 10-16% of dolomite, 4-6% of calcined talc and 5-9% of kaolin;
wherein, the nano zinc oxide needs to be pretreated, and the pretreatment comprises the following steps:
under the first stirring condition, adding the nano zinc oxide into water, then adding a dispersing agent accounting for 0.1-0.15% of the total volume and a suspending agent accounting for 0.1% of the total volume, and continuously stirring for 20-35 min to obtain a pretreated nano zinc oxide solution.
Further, the dispersing agent is sodium tripolyphosphate.
Further, the suspending agent is one or a mixture of two of methylcellulose and polymethylsiloxane.
Further, the first stirring conditions are: the rotating speed is 5000r/min-8000 r/min.
Further, the preparation method of the ceramic pot glaze material comprises the following steps:
adding cerium oxide, tourmaline, fused quartz, calcined kaolin, ball clay, spodumene, dolomite, calcined talc and kaolin into the pretreated nano zinc oxide solution, adding water, and then carrying out first ball milling treatment, first sieving treatment and first iron removal treatment to obtain the ceramic pot glaze.
Further, the time of the first ball milling treatment is 7h-9 h.
Further, a 325 mesh sieve is adopted in the first sieving treatment.
Further, the Baume specific gravity of the ceramic pot glaze is 1.4-1.6.
In addition, the invention also provides a preparation method of the multifunctional ceramic pot, which comprises the following steps:
adding the preparation raw materials of the ceramic pot blank into a ball mill for second ball milling treatment, second screening treatment and second iron removal treatment, and then performing first pressing treatment to obtain a mud cake;
placing the mud cakes in a soil refining machine for vacuum refining treatment to obtain mud strips;
cutting the mud strips, then placing the mud strips into a mould, and performing second pressing treatment to obtain a ceramic pot green body;
drying and finishing the ceramic pot green body to obtain a ceramic pot green body;
and soaking the ceramic pot blank body in the ceramic pot glaze, drying in the shade, then firing, and naturally cooling to obtain the multifunctional ceramic pot.
Further, the temperature of the firing treatment is 1230-1240 ℃, and the time of the firing treatment is 15-17 h.
According to the scheme, the ceramic pot blank of the multifunctional ceramic pot, the raw material preparation and the raw material preparation content of the ceramic pot glaze are optimized, and the preparation process parameters are strictly controlled, wherein the ceramic pot blank contains 49-51% of spodumene, the ceramic pot glaze also contains 55-58% of spodumene, the ceramic pot glaze can be irreversibly changed into high-temperature beta-spodumene after being heated at high temperature, the irreversible high-temperature transformation and low expansion coefficient of the ceramic pot blank are ensured, and the ceramic pot glaze with the low expansion coefficient is combined, so that the high-temperature shrinkage condition of the ceramic blank and the ceramic pot glaze can be effectively reduced, the ceramic blank and the ceramic pot glaze are not easy to crack after being subjected to quenching by adding water after being air-fired, and the multifunctional ceramic pot which is beneficial to obtaining the compatibility between the ceramic glaze and the ceramic pot blank, has a smooth surface and has no pinholes and is resistant to thermal shock on the whole; through the pretreatment of the nano zinc oxide, under the action of a dispersing agent and a suspending agent, the agglomeration phenomenon of the nano zinc oxide is reduced, the nano zinc oxide, the cerium oxide and the tourmaline which are dispersed more uniformly can play more excellent antibacterial action and far infrared ray emission function in a skeleton structure formed by the tourmaline, the fused quartz, the calcined kaolin, the ball clay, the spodumene, the dolomite, the calcined talc and the kaolin, and further, the ceramic pot is endowed with remarkable and lasting antibacterial and water purification functions, and the cooked food is sweet and delicious.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The multifunctional ceramic pot in one embodiment of the invention comprises a ceramic pot blank body and a ceramic pot glaze, wherein the ceramic pot blank body is prepared from 49-51% of spodumene, 25-30% of clay, 4-7% of quartz, 8-12% of alkaline earth and 1-4% of talc by mass;
the ceramic pot glaze consists of the following preparation raw materials in percentage by mass:
4-6% of nano zinc oxide, 1-2% of cerium oxide, 4-7% of tourmaline, 5-10% of fused quartz, 5-8% of calcined kaolin, 1% of ball clay, 55-58% of spodumene, 10-16% of dolomite, 4-6% of calcined talc and 5-9% of kaolin;
wherein, the nano zinc oxide needs to be pretreated, and the pretreatment comprises the following steps:
under the first stirring condition, adding the nano zinc oxide into water, then adding a dispersing agent accounting for 0.1-0.15% of the total volume and a suspending agent accounting for 0.1% of the total volume, and continuously stirring for 20-35 min to obtain a pretreated nano zinc oxide solution.
In one embodiment, the nano zinc oxide has an average particle size of 20 to 60 nm.
In one embodiment, the dispersant is sodium tripolyphosphate.
In one embodiment, the suspending agent is one or a mixture of two of methylcellulose and polymethylsiloxane.
In one embodiment, the first stirring conditions are: the rotating speed is 5000r/min-8000 r/min.
In one embodiment, the preparation method of the ceramic pot glaze material comprises the following steps:
adding cerium oxide, tourmaline, fused quartz, calcined kaolin, ball clay, spodumene, dolomite, calcined talc and kaolin into the pretreated nano zinc oxide solution, adding water, and then carrying out first ball milling treatment, first sieving treatment and first iron removal treatment to obtain the ceramic pot glaze.
In one embodiment, the time of the first ball milling treatment is 7h to 9 h.
In one embodiment, a 325 mesh screen is used in the first screening process.
In one embodiment, the ceramic pot glaze has a baume specific gravity of 1.4 to 1.6.
In one embodiment, the first iron removal treatment is three-cycle electromagnetic iron removal.
In one embodiment, the ceramic pot glaze material has the expansion coefficient of (95-105) multiplied by 10-7/℃。
In addition, the invention also provides a preparation method of the multifunctional ceramic pot, which comprises the following steps:
adding the preparation raw materials of the ceramic pot blank into a ball mill for second ball milling treatment, second screening treatment and second iron removal treatment, and then performing first pressing treatment to obtain a mud cake;
placing the mud cakes in a soil refining machine for vacuum refining treatment to obtain mud strips;
cutting the mud strips, then placing the mud strips into a mould, and performing second pressing treatment to obtain a ceramic pot green body;
drying and finishing the ceramic pot green body to obtain a ceramic pot green body;
and soaking the ceramic pot blank body in the ceramic pot glaze, drying in the shade, then firing, and naturally cooling to obtain the multifunctional ceramic pot.
In one embodiment, the raw materials for preparing the ceramic pot blank also comprise, by mass, 25% -30% of clay, 4% -7% of quartz, 8% -12% of alkaline earth and 1% -4% of talc.
In one embodiment, the time of the second ball milling treatment is 5h to 8 h.
In one embodiment, the second screening treatment is performed with a 350 mesh screen, 250 mesh screen.
In one embodiment, the second iron removal process is electromagnetic iron removal.
In one embodiment, the pressurizing rate in the first pressing process is 15MPa/min-25MPa/min, the vibration frequency of 25Hz-35Hz is adopted in the first pressing process, the pressurizing time in the first pressing process is 15s-25s, the pressure maintaining time in the first pressing process is 1min-2min, and the pressure is released at the pressure releasing rate of 5MPa/min-15MPa/min after the first pressing process.
In one embodiment, the vacuum degree of the vacuum refining is-0.1 MPa to-0.04 MPa.
In one embodiment, the water content of the mud cake is 29% -35%.
In one embodiment, the pressurizing rate in the second pressing process is 10MPa/min-15MPa/min, the pressurizing time in the second pressing process is 15s-25s, the pressure maintaining time in the second pressing process is 2min-5min, and the pressure is released at the pressure releasing rate of 3MPa/min-8MPa/min after the first pressing process.
In one embodiment, the water content of the mud strips is 26% -28%.
In one embodiment, the soaking time is 25-28 s.
In one embodiment, the drying treatment is carried out in the shade until the water content of the glaze surface is lower than 20%.
In one embodiment, the temperature of the firing treatment is 1230-1240 ℃, and the time of the firing treatment is 15-17 h.
In the scheme, the ceramic pot blank of the multifunctional ceramic pot, the ceramic pot glaze and the component content are optimized, and the preparation process parameters are strictly controlled, wherein the ceramic pot blank contains 49-51% of spodumene, the ceramic pot glaze also contains 55-62% of spodumene, the ceramic pot glaze can be irreversibly changed into high-temperature beta-spodumene after being heated at high temperature, the irreversible high-temperature transformation and low expansion coefficient of the ceramic pot blank are ensured, and the ceramic pot glaze with the low expansion coefficient is combined, so that the high-temperature shrinkage of the ceramic blank and the ceramic pot glaze can be effectively reduced, the ceramic blank and the ceramic pot glaze are not easy to crack after being subjected to air firing by adding water and quenching, and the multifunctional ceramic pot which is smooth in surface, free of pinholes and resistant to thermal shock is integrally beneficial to obtaining the compatibility between the ceramic pot glaze and the ceramic pot blank; the nano zinc oxide is pretreated, the agglomeration phenomenon of the nano zinc oxide is reduced under the action of a dispersing agent and a suspending agent, the nano zinc oxide, the cerium oxide and the tourmaline which are dispersed more uniformly can play a more excellent antibacterial effect and a far infrared ray emission function in a skeleton structure formed by the tourmaline, the fused quartz, the calcined kaolin, the ball clay, the spodumene, the dolomite, the calcined talc and the kaolin, and further, the ceramic pot is endowed with excellent and lasting antibacterial and water purification functions, and the cooked food is sweet and delicious.
Embodiments of the present invention will be described in detail below with reference to specific examples.
Examples 1 to 3:
the raw material contents of the ceramic pot glaze materials in examples 1 to 3 were different, and are specifically shown in table 1.
A preparation method of a multifunctional ceramic pot comprises the following steps:
adding nano zinc oxide with the average particle size of 20-60 nanometers into water under the condition that the rotating speed is 8000r/min, then adding sodium tripolyphosphate accounting for 0.1 percent of the total volume and methyl cellulose accounting for 0.1 percent of the total volume, and continuously stirring for 35min to obtain a pretreated nano zinc oxide solution;
adding cerium oxide, tourmaline, fused quartz, calcined kaolin, ball clay, spodumene, dolomite, calcined talc and kaolin into the pretreated nano zinc oxide solution, adding water, performing first ball milling treatment for 9 hours, sieving with a 325-mesh sieve, performing three-time circulating electromagnetic iron removal, and modulating to obtain a ceramic pot glaze with the Baume specific gravity of 1.4-1.6 for later use;
adding 50% of spodumene, 30% of clay, 6% of quartz, 10% of alkaline earth and 4% of talc into a ball mill according to mass percentage, carrying out second ball milling treatment for 8 hours, sieving with a 350-mesh sieve and electromagnetic iron removal treatment, then carrying out first pressing treatment to obtain a mud cake with the water content of 29% -35%, wherein the pressurizing rate in the first pressing treatment is 25MPa/min, the vibration frequency of 25Hz is adopted in the first pressing treatment, the pressurizing time in the first pressing treatment is 20s, the pressure maintaining time in the first pressing treatment is 1min, and after the first pressing treatment, pressure relief is carried out at the pressure relief rate of 15 MPa/min;
placing the mud cakes in a soil refining machine, and performing vacuum pumping refining treatment under the condition that the vacuum degree is-0.04 Mpa to obtain mud strips with the water content of 26-28%;
cutting the mud strips, then placing the mud strips into a mold, and performing second pressing treatment to obtain a ceramic pot green body, wherein the pressing rate in the second pressing treatment is 15MPa/min, the pressing time in the second pressing treatment is 15s, the pressure maintaining time in the second pressing treatment is 2min, and after the first pressing treatment, pressure relief is performed at the pressure relief rate of 3 MPa/min;
drying and finishing the ceramic pot green body to obtain a ceramic pot green body;
soaking the ceramic pot blank body in the ceramic pot glaze for 25-28 s, drying in the shade until the water content of the glaze surface is lower than 20%, firing in a tunnel kiln at the temperature of 1230 ℃ for 16h, and naturally cooling to obtain the multifunctional ceramic pot.
Examples 4 to 5:
examples 4-5 differ from example 3 in that: the ceramic pot blank in examples 4-5 was prepared from different raw materials and in different amounts, as shown in table 2, and the other raw materials, raw material amounts, process steps, and process parameters were the same as in example 3.
Example 6:
example 6 differs from example 3 in that: the parameters of the preparation process in example 6 were different from those in example 3, and other preparation raw materials, preparation raw material contents and process steps were the same as those in example 3.
The preparation method of the multifunctional ceramic pot in the embodiment 6 comprises the following steps:
adding nano zinc oxide with the average particle size of 20-60 nanometers into water under the condition of the rotating speed of 5000r/min, then adding sodium tripolyphosphate accounting for 0.15% of the total volume and methyl cellulose accounting for 0.1% of the total volume, and continuously stirring for 35min to obtain a pretreated nano zinc oxide solution;
adding cerium oxide, tourmaline, fused quartz, calcined kaolin, ball clay, spodumene, dolomite, calcined talc and kaolin into the pretreated nano zinc oxide solution, adding water, performing first ball milling treatment for 9 hours, sieving with a 325-mesh sieve, performing three-time circulating electromagnetic iron removal, and modulating to obtain a ceramic pot glaze with the Baume specific gravity of 1.4-1.6 for later use;
adding spodumene, clay, quartz, alkaline earth and talc into a ball mill according to mass percent, carrying out second ball milling treatment for 8 hours, sieving with a 350-mesh sieve and carrying out electromagnetic iron removal treatment, then carrying out first pressing treatment to obtain a mud cake with the water content of 29-35%, wherein the pressing rate in the first pressing treatment is 15MPa/min, the first pressing treatment adopts the vibration frequency of 35Hz, the pressing time in the first pressing treatment is 25s, the pressure maintaining time in the first pressing treatment is 1min, and after the first pressing treatment, pressure relief is carried out at the pressure relief rate of 10 MPa/min;
placing the mud cakes in a soil refining machine, and performing vacuum pumping refining treatment under the condition that the vacuum degree is-0.1 Mpa to obtain mud strips with the water content of 26-28%;
cutting the mud strips, then placing the mud strips into a mold, and performing second pressing treatment to obtain a ceramic pot green body, wherein the pressing rate in the second pressing treatment is 10MPa/min, the pressing time in the second pressing treatment is 15s, the pressure maintaining time in the second pressing treatment is 2min, and after the first pressing treatment, pressure relief is performed at the pressure relief rate of 3 MPa/min;
drying and finishing the ceramic pot green body to obtain a ceramic pot green body;
soaking the ceramic pot blank body in the ceramic pot glaze for 25-28 s, drying in the shade until the water content of the glaze surface is lower than 20%, firing in a tunnel kiln at the temperature of 1235 ℃ for 17h, and naturally cooling to obtain the multifunctional ceramic pot.
Comparative examples 1 to 4:
comparative examples 1 to 4 differ from example 3 in that: the raw materials for preparation and the contents of the raw materials for preparation of the ceramic pot glaze in comparative examples 1 to 4 were different, and specifically, as shown in table 1, other raw materials for preparation, the contents of the raw materials for preparation, the process steps and the process parameters were the same as those in example 3.
Comparative examples 5 to 7:
comparative examples 5 to 7 differ from example 3 in that: the ceramic pot blanks of comparative examples 5 to 7 were different in the raw materials for preparation and the contents of the raw materials for preparation, and specifically, as shown in table 2, the other raw materials for preparation, the contents of the raw materials for preparation, the process steps, and the process parameters were the same as those of example 3.
Comparative example 8:
comparative example 8 differs from example 3 in that: the nano zinc oxide in the comparative example 8 is not pretreated, that is, the nano zinc oxide, cerium oxide, tourmaline, fused quartz, calcined kaolin, ball clay, spodumene, dolomite, calcined talc and kaolin are directly mixed, water is added, then the first ball milling treatment is carried out for 9 hours, the mixture is sieved by a 325-mesh sieve and is subjected to three-time circulating electromagnetic iron removal, and the ceramic pot glaze with the Baume specific gravity of 1.4 to 1.6 is obtained for standby application, and other preparation raw materials, the content of the preparation raw materials, the process steps and the process parameters are the same as those in the example 3.
Comparative example 9:
comparative example 9 differs from example 3 in that: the process steps and process parameters in comparative example 9 are different from those in example 3, and the contents of other preparation raw materials and preparation raw materials are the same as those in example 3, specifically as follows:
a preparation method of a multifunctional ceramic pot comprises the following steps:
adding nano zinc oxide with the average particle size of 20-60 nanometers into water under the condition that the rotating speed is 8000r/min, then adding sodium tripolyphosphate accounting for 0.1 percent of the total volume and methyl cellulose accounting for 0.1 percent of the total volume, and continuously stirring for 35min to obtain a pretreated nano zinc oxide solution;
adding cerium oxide, tourmaline, fused quartz, calcined kaolin, ball clay, spodumene, dolomite, calcined talc and kaolin into the pretreated nano zinc oxide solution, adding water, performing first ball milling treatment for 9 hours, sieving with a 325-mesh sieve, performing three-time circulating electromagnetic iron removal, and modulating to obtain a ceramic pot glaze with the Baume specific gravity of 1.4-1.6 for later use;
adding spodumene, clay, quartz, alkaline earth and talc into a ball mill, carrying out second ball milling treatment for 8 hours, sieving with a 350-mesh sieve and carrying out electromagnetic iron removal treatment, then carrying out first pressing treatment to obtain a mud cake with the water content of 29-35%, wherein the pressing rate in the first pressing treatment is 5MPa/min, the pressing time in the first pressing treatment is 20s, the pressure maintaining time in the first pressing treatment is 10min, and after the first pressing treatment, pressure relief is carried out at the pressure relief rate of 5 MPa/min;
placing the mud cakes in a soil refining machine, and performing vacuum pumping refining treatment under the condition that the vacuum degree is-0.04 Mpa to obtain mud strips with the water content of 26-28%;
cutting the mud strips, then placing the mud strips into a mold, and performing second pressing treatment to obtain a ceramic pot green body, wherein the pressing rate in the second pressing treatment is 5MPa/min, the pressing time in the second pressing treatment is 15s, the pressure maintaining time in the second pressing treatment is 15min, and after the first pressing treatment, pressure relief is performed at the pressure relief rate of 3 MPa/min;
drying and finishing the ceramic pot green body to obtain a ceramic pot green body;
soaking the ceramic pot blank body in the ceramic pot glaze for 25-28 s, drying in the shade until the water content of the glaze surface is lower than 20%, firing in a tunnel kiln at the temperature of 1230 ℃ for 16h, and naturally cooling to obtain the multifunctional ceramic pot.
Table 1: unit (%)
Table 2: unit (%)
The multi-functional ceramic pots prepared in examples 1 to 6 and the multi-functional ceramic pots prepared in comparative examples 1 to 9 were respectively checked for appearance with reference to QB/T2580-2018, and the results are shown in Table 3 below.
Table 3:
note that the appearances in table 3 were subjectively evaluated by a skilled person through eye observation.
As can be seen from the descriptions in table 3, the multifunctional ceramic pot prepared in the present application has a smooth surface, no pinholes, no spots, no glaze bubbles, no glaze shrinkage, and no cracks after firing, but spodumene is not added to the raw materials for preparing the ceramic pot glaze in comparative example 4, so that cracks are formed on the surface of the multifunctional ceramic pot, and the raw materials for preparing the ceramic green bodies in comparative examples 5 to 7 are changed in content, which causes appearance defects of the prepared multifunctional ceramic pot, and particularly, the content of the added spodumene in the total mass percentage of the raw materials for preparing the ceramic green bodies is changed, which affects the preparation quality of the multifunctional ceramic pot. Comprehensively, the ceramic pot glaze and the ceramic pot blank have a synergistic effect, so that the multifunctional ceramic pot which is excellent in appearance and not easy to crack is obtained; the nano zinc oxide in the comparative example 8 is not pretreated to cause agglomeration, surface pinholes and obvious spots, which shows that the pretreatment of the nano zinc oxide is helpful to improve the quality of the multifunctional ceramic pot, and the change of the process steps and process parameters in the comparative example 9 causes slight cracks, so that the raw material preparation and the preparation process are taken as a whole, and the optimization is helpful to obtain the multifunctional ceramic pot with better quality.
And (3) testing thermal shock resistance:
the multifunctional ceramic pot prepared in example 3 and the multifunctional ceramic pots prepared in comparative examples 1 to 9 were subjected to a thermal shock resistance test, in which liquefied petroleum gas was used as a gas source, the bottom of the sample was respectively subjected to dry burning with open fire, the gas pressure was 2800Pa, the flame load was 4.2Kw, when any of the three points (center, edge point, and between center and edge point) in the bottom of the sample reached 490 ℃ to 500 ℃, 1/10, the volume of which is the effective volume of the sample, and water at 22 ℃ was poured into the sample within 5s, the presence or absence of tire cracking of the sample was checked, and then the sample was placed in water to soak for 24h, and then heated to boiling with water, and whether glaze jump occurred or not was observed, with the results shown in table 4.
Table 4:
as can be seen from the data analysis of Table 4, after the raw materials for preparing the ceramic cooker blank and the raw materials for preparing the ceramic cooker glaze are optimized, the obtained multifunctional ceramic cooker has excellent thermal shock resistance, is not cracked when quenched, and has excellent thermal shock resistance so as to ensure the use quality and the use safety of the multifunctional ceramic cooker. However, the cases of the green body cracking in comparative example 5, comparative example 6, comparative example 7 and comparative example 9, and the occurrence of the glaze jump in the samples in comparative example 4, comparative example 5, comparative example 6 and comparative example 8 at different degrees, show that the difference between the raw material for preparing the ceramic pot blank and the raw material for preparing the ceramic pot glaze in the present application affects the production quality of the multifunctional ceramic pot.
The multifunctional ceramic pots prepared in examples 1 to 6 and the multifunctional ceramic pots prepared in comparative examples 1 to 9 were subjected to the antibacterial property and the infrared emissivity tests, and the results are shown in table 5 below.
Table 5:
the data recorded in table 5 show that the nano zinc oxide, the cerium oxide and the tourmaline in the multifunctional ceramic pot prepared by the invention have a synergistic antibacterial effect, the components are compounded and synergized, and the multifunctional ceramic pot has a more excellent antibacterial effect, the antibacterial rate of the multifunctional ceramic pot on staphylococcus aureus reaches more than 99%, and is far better than 90% of the national standard; the emissivity of far infrared rays with the wavelength of 4-14 mu m is more than 0.85, and the multifunctional pot also has the function of purifying water quality to a certain extent, so that the multifunctional pot has higher added value.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a multi-functional ceramic a kind of deep pot, the said multi-functional ceramic a kind of deep pot includes ceramic a kind of deep pot body and ceramic a kind of deep pot glaze, characterized by:
according to the mass percentage, the raw materials for preparing the ceramic pot blank body comprise 49-51% of spodumene, 25-30% of clay, 4-7% of quartz, 8-12% of alkaline earth and 1-4% of talcum;
the ceramic pot glaze consists of the following preparation raw materials in percentage by mass:
4-6% of nano zinc oxide, 1-2% of cerium oxide, 4-7% of tourmaline, 5-10% of fused quartz, 5-8% of calcined kaolin, 1% of ball clay, 55-58% of spodumene, 10-16% of dolomite, 4-6% of calcined talc and 5-9% of kaolin;
wherein, the nano zinc oxide needs to be pretreated, and the pretreatment comprises the following steps:
under the first stirring condition, adding the nano zinc oxide into water, then adding a dispersing agent accounting for 0.1-0.15% of the total volume and a suspending agent accounting for 0.1% of the total volume, and continuously stirring for 20-35 min to obtain a pretreated nano zinc oxide solution.
2. The multifunctional ceramic pot according to claim 1, wherein the dispersant is sodium tripolyphosphate.
3. The multifunctional ceramic pot according to claim 2, wherein the suspending agent is one or a mixture of two of methylcellulose and polymethylsiloxane.
4. The multifunctional ceramic pot according to claim 3, wherein the first stirring condition is: the rotating speed is 5000r/min-8000 r/min.
5. The multifunctional ceramic pot as claimed in claim 4, wherein the preparation method of the ceramic pot glaze comprises the following steps:
adding cerium oxide, tourmaline, fused quartz, calcined kaolin, ball clay, spodumene, dolomite, calcined talc and kaolin into the pretreated nano zinc oxide solution, adding water, and then carrying out first ball milling treatment, first sieving treatment and first iron removal treatment to obtain the ceramic pot glaze.
6. The multifunctional ceramic pot according to claim 5, wherein the time of the first ball milling treatment is 7-9 h.
7. The multifunctional ceramic pot according to claim 5, wherein 325 mesh sieve is adopted in the first sieving treatment.
8. The multifunctional ceramic pot according to claim 5, wherein the ceramic pot glaze has a Baume specific gravity of 1.4-1.6.
9. A method for preparing a multifunctional ceramic pot, which is characterized by comprising the following steps:
adding the preparation raw materials of the ceramic pot blank into a ball mill for second ball milling treatment, second screening treatment and second iron removal treatment, and then performing first pressing treatment to obtain a mud cake;
placing the mud cakes in a soil refining machine for vacuum refining treatment to obtain mud strips;
cutting the mud strips, then placing the mud strips into a mould, and performing second pressing treatment to obtain a ceramic pot green body;
drying and finishing the ceramic pot green body to obtain a ceramic pot green body;
soaking the ceramic pot blank body in the ceramic pot glaze material as claimed in claim 1, drying in the shade, then firing, and naturally cooling to obtain the multifunctional ceramic pot.
10. The method for preparing a multifunctional ceramic pot according to claim 9, wherein the temperature of the firing treatment is 1230-1240 ℃ and the time of the firing treatment is 15-17 h.
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