Luminous ceramics is the application of long afterglow luminescent materials in ceramic industry. In this paper, new long-lasting luminescent materials Sr2MgSi2O7:Eu2+, Dy3+ and Dy3+ with excellent luminescent properties were prepared by sol-gel method, which were successfully applied to1050℃-150℃ high-temperature glaze, and Sr2MgSi2O7 was prepared for the first time. The water resistance, chemical stability and high temperature resistance of Sr2MgSi2O7:Eu2+, Dy3+ and Dy3+ luminescent materials were discussed. The luminescent properties of Sr2MgSi2O7:Eu2+, Dy3+ and Dy3+ luminescent materials are discussed, and their luminescent mechanism is preliminarily discussed. Based on the study of luminescent materials, the preparation technology of Sr2MgSi2O7:Eu2+, Dy3+ luminescent ceramic glaze was studied. ................... studied 55 pages of luminous glaze.
2. Study on ultra-smooth ceramic glaze.
Ultra-smooth glaze was prepared by conventional firing method with potash feldspar, Yingshi, kaolin, calcite and dolomite as raw materials. The effects of glaze paste properties, high temperature properties of glaze and microstructure of glaze layer on glaze roughness are discussed. The properties of glaze slurry, such as glaze composition, particle size, concentration and fluidity, are not only the key factors affecting the glaze application process, but also have a great influence on the quality of glazed surface after firing. With the increase of frit content in the glaze, the roughness of the glaze surface gradually decreases and the gloss gradually increases after firing. When the content of glass frit is more than 60wt%, the glaze roughness (Ra) is less than 10nm, and when the content is more than 80wt%, the glaze gloss is more than 1 10%. With the decrease of the particle size of the glaze slurry, the glaze roughness decreases gradually. When the D90 is between 4.0 and 7.5 microns, the glaze roughness is less than 65438 00 nm. The suitable concentration of glaze slurry is: green1.5 ~1.6g cm-3, plain1.6 ~1.7g cm-3, so as to obtain ................... * * 47 pages with good glaze quality.
3. Study on the preparation technology and properties of antibacterial self-cleaning film of ceramic glaze.
The preparation technology and properties of antibacterial self-cleaning film for ceramic glaze were studied. In this paper, stable silver-loaded nano-TiO _ 2 hydrosol was prepared by colloidal solution method. Taking Zeta potential, light transmittance and particle size distribution of sol as main characterization indexes, the effects of pH value, colloid preparation concentration, colloid solvent concentration, colloid preparation temperature and silver-loaded modification on its dispersion stability were emphatically investigated. The preparation conditions were optimized, and the coating effect of ceramic glazed substrate was characterized and tested by SEM and EDS. The results show that when the bath temperature is t = 40 ~ 80℃ and the pH of the sol is =1.2 ~ 2.0, the titanate precursor with the mass fraction of 0.05 ~ 0.3 mol/L can be dissolved with 5% dilute nitric acid or 3% dilute hydrochloric acid, and the stable nano-titanium dioxide hydrosol can be prepared. Page 49 of ................... * *.
4. Study on low zirconium opaque glaze and its structure.
Zirconium silicate is a commonly used opacifier in ceramic glaze, but its source is limited and its price is expensive. Excessive use will also cause glaze defects and radiation of the product. At present, the development and use of zirconium-less or zirconium-free opaque glaze is a trend in the ceramic field at home and abroad. In this paper, three series of low-zirconium or non-zirconium composite opacified glazes were prepared by adjusting the amount of apatite. The properties and microstructure of the samples were analyzed by XRD, SEM and other modern testing techniques, and the opacification mechanism of glaze and the combination mechanism of blank and glaze were discussed. The green body is made of Wuhan East Lake sludge, fly ash, wollastonite and other solid wastes. After firing at 1 100℃, the green body is brownish red, with water absorption of 7.24%, porosity of 15.82% and bulk density of 2. 19g.cm-3-3. The thermal expansion coefficient is 4.67× 10-6/℃, and the acidity coefficient is 0.75. The main crystal phases of the green body are acicular kyanite crystal (al2o 3), granular timely crystal (SiO2) and massive ................... ***52 pages.
5. Study on New Nano-metallic Gloss Glaze
Firstly, the metallic luster agent CuMn2O4 powder was synthesized by wet chemical method, and added to the basic glaze to prepare nano metallic luster glaze. The synthesis process of CuMn2O4 and the preparation process of metallic luster glaze were studied by means of TG-DTA, XRD, Fe-SEM and EPMA, and the coloring mechanism of metallic luster glaze was discussed. Using CuSO4 5H2O and mnso 4·H2O as raw materials, the optimum process parameters for synthesizing CuMn2O4 powder by * * precipitation method are: pH= 10, reaction temperature 45℃, reactant concentration 0. 1g/mL, heat treatment temperature 850℃, and the main crystal phase of the sample is n-CuMn2O4, which belongs to cubic crystal system on average. The results show that the heat treatment temperature directly affects the crystallization of the product. With the increase of heat treatment temperature, the average crystallinity of CuMn2O4 powder first increases and then decreases. The average crystallinity reaches the maximum at 800℃, which is 89. 15%, and the grain size is about 100nm. When the heat treatment temperature is 850℃, the average crystallinity is 83.33% and the crystal ................... is 43 pages.
6. Optimization of glaze formula and quantitative analysis of ceramic body microstructure.
Aiming at two key technical problems that restrict the quality of ceramic production in the actual ceramic production process, the corresponding improvement scheme is put forward theoretically and improved in technical realization. The specific scheme is as follows: First, in the aspect of formula optimization, the ceramic formula is optimized by using the optimization algorithm, and the tedious traditional manual calculation is given to the computer, which shortens the product design cycle and improves the production efficiency. Based on the analysis of numerical optimization algorithm, aiming at the characteristics of ceramic formula optimization method, complex method and genetic algorithm are used to design ceramic formula respectively. Through the comparative analysis of the results of the two algorithms, it is found that the results calculated by the standard genetic algorithm are not ideal, and there is still a certain gap compared with the results of the complex method, so the standard genetic algorithm is optimized and ................... is on page 65.
7. Study on preparation of ceramic glaze from granite waste.
Stone will produce a lot of waste from raw material processing to finished products. In the process of mining and cutting granite, a lot of debris and cutting powder will be produced and discarded as waste, resulting in waste of resources. At present, the glazes used in art ceramics and glazed tiles are all processed from a variety of natural raw materials (such as timely, feldspar, limestone, etc.). )? And become. Due to the decreasing mineral resources of glaze, ................... ***40 pages.
8. Preparation and firing mechanism of ultra-low temperature glaze.
The glaze formula and additives were designed, and the high quality glaze with firing temperature below 800℃ was successfully prepared. The structure, microstructure and formation process of the samples were characterized by DSC-TG, XRD, SEM and Raman spectroscopy, and the physical properties of the glaze were tested. The low-temperature firing mechanism and optimal firing system of ultra-low temperature glaze were studied. The effects of ZnO and Na2B4O7 on the firing temperature of glaze and the effects of firing system on the quality of glaze were discussed. The results show that B2O3:SiO2 is 1.367: 1 (mass ratio), the content of ZnO is 1 1.74%, and the firing temperature of the glaze is about 780℃. After firing, the glaze is smooth, high gloss, good transparency and strong heat resistance. Compared with the original formula, the initial melting temperature is reduced by about 500℃; The temperature width increases during melting.
9. Preparation of superfine inorganic composite antibacterial enamel
The development status of enamel and antibacterial enamel is briefly introduced. The classification, preparation method, antibacterial mechanism of antibacterial agents and the method of introducing antibacterial agents into enamel are expounded. The detection methods of antibacterial products are also briefly introduced. The suitable technological conditions for preparing ultrafine inorganic composite antibacterial powder were determined, that is, under the conditions of constant total liquid volume and constant raw material ratio, the stirring speed was 750r/min, the dosage of dispersant was 0. 13g( 1.0%), the reaction time was 40min, the reaction temperature was 98℃, the calcination temperature was 750℃ and the calcination time was 3 h. Antibacterial powder is an insoluble antibacterial agent. When the concentration of the antibacterial agent is 100mg/L, the * * * of Escherichia coli in ................... is 55 pages in 30 minutes.
Development of 10 low temperature fast burning crystalline glaze
In order to shorten the firing cycle of traditional crystalline glaze and reduce the production cost, zinc crystalline glaze silicate was developed with zinc oxide and silicon dioxide as main raw materials, fluorite was added to reduce the viscosity of glaze, and rutile titanium dioxide was used as nucleating agent, which met the requirements of low-temperature rapid firing of modern building ceramics in terms of formula and technology. By constantly adjusting the glaze formula and technology and introducing varieties, the technological method of preparing crystalline glaze with good crystallization effect, low sintering temperature and short sintering period was obtained. The composition and microstructure of crystalline glaze were studied and analyzed by X-ray diffraction analysis and polarizing microscope, and it was determined that the main crystalline phase precipitated in the glaze was zinc silicate crystal. The crystallization mechanism of fast-fired crystalline glaze was discussed, and the ................... of each group was analyzed for 50 pages.
Study on 1 1 opacified glaze fired at low temperature and discussion on opacifying mechanism
In the glaze formula, low-priced apatite is used to replace or partially replace zircon as opacifying agent to prepare phosphorus opaque glaze and phosphorus-zirconium composite opaque glaze. The yellow river muddy ceramic body was prepared by grouting method and fired at1080 ~1180℃. The water absorption, porosity and bulk density of the samples were tested. The crystal phase composition and microstructure of the samples were analyzed by XRD, SEM and EPMA. The results show that the main crystalline phases of the sintered body are columnar mullite (A 16Si20 13) and granular timely crystal (Si02). After firing, the green body of the Yellow River mud ceramics is darker in color. In this paper, a low-temperature opaque glaze which can cover the color of the blank has been successfully developed, and its optimum formula and reasonable preparation process have been studied. The whiteness and microhardness of typical samples were tested. The structure and properties of glaze layer are analyzed, and the opacification mechanism of glaze layer and the combination mechanism of green body and glaze layer are discussed. Among them, the better phosphorus glaze in ................... is 65 pages.
12, preparation and properties of porous glaze film
Using quartz sand, feldspar, limestone, bentonite, borax and industrial alumina powder as raw materials and soluble starch as pore-forming agent, a porous glaze film with smooth surface, high mechanical strength and uniform pore size distribution can be obtained by spraying and high temperature sintering. The thickness of the film is affected by spraying time and glaze slurry concentration, and the pore size of the film is affected by the type and dosage of pore-forming agent, sintering temperature and holding time of the glaze film. By adjusting these factors, the porous glaze film with controllable aperture can be prepared. The maximum dosage of pore-forming agent should not exceed 15%, otherwise large area defects will appear on the surface of glaze film. ................... with scanning electronic equipment ***40 pages.
13, preparation and properties of antifouling ceramic materials
The effects of functional ceramics on water surface tension, contact angle, dissolved oxygen, emulsion stability and plant seed germination were studied, and the movement law of oil droplets on water ceramic surface was tested. The results show that the ceramics prepared by adding rare earth composite phosphate inorganic antibacterial materials into ceramic glaze have good antifouling function; When ceramics contact with water, it can activate water molecules, reduce the surface tension of water, reduce the contact angle of water on the ceramic surface, improve the stability of emulsion, and make the ceramic surface have anti-oil pollution function. Water treated with antifouling ceramics can also be found on page 46 of. ....................
14, development and properties of high white glaze
Zirconite is used as opacifier, and the sintering temperature is higher than 65438 0300℃. The high-temperature opacified white glaze with whiteness greater than 80 meets the national standard. By means of OM, SEM and XRD. The technological conditions and formation mechanism of the glaze were systematically studied. The results show that the optimum amount of zircon is 9% ~ 13%, and the optimum value of SiO _ 2: Al _ 2O _ 3 is 7.32: 1. The main crystals in the glaze layer are zirconium silicate and timing. The main factors affecting the glaze effect are glaze composition, particle size, the amount of opacifier and flux, the ratio of SiO _ 2: Al _ 2O _ 3, firing system and so on. ................... ***50 pages
15. Design of glaze formula and study on glaze performance of once-fired glazed tiles.
The characteristics of glaze formula of once-fired glazed tile blank are systematically analyzed. By reasonably selecting raw materials, introducing local Tangshan raw materials such as diopside, wollastonite and porcelain stone which are suitable for low-temperature rapid firing, adjusting the content of Si2O and Al2O3 in the formula and their quantitative relationship with K2O and Na2O, the chemical composition range and the best formula of once-fired glazed tile blank glaze formula are determined. In the firing process, "step-by-step heating" is combined with fast and slow heating. By testing and analyzing the thermogravimetric curve, differential thermal curve and expansion-contraction curve of the blank formula, and measuring the expansion coefficient and melting temperature of the blank glaze, it can be seen that the ignition loss of the blank is small.