33 results about "Slip (ceramics)" patented technology

Coloring in a slip casting process by which a ceramic slurry is cast into green state bodies. It is during this slip casting that a coloring solution consisting of metallic salts is introduced to the slurry and subsequently slip-cast. A coloring solution may comprise for example a metallic salt, a solvent, an organic solvent such as derivatives of propylene oxides, and an acid can be introduced to the slip casting process. Such a coloring solution can be added to the slip casting process. The solution is thoroughly mixed with the ceramic slurry, after which the ceramic body is cast, dried and finally subjected to a sintering process. After final sinter, the resulting ceramic body possesses an innate color that is homogenous throughout its composition. The method is especially useful for coloring zirconia dental restorations.

The invention relates to a preparation method of a yttrium zirconate microcrystal ceramic glaze having a photocatalytic function. The preparation method comprises the following steps: preparing quartz, potash feldspar, albite, borax, Y2O3, Suzhou clay and lithium carbonate, keeping the above raw materialsat 1270-1290 DEG C for 20-40 minutes, taking out, pouring into water, quenching to prepare a fusion cake, and grinding the fusion cake to obtain a material A; preparing the material A, Y2O3, ZrO2 and Suzhou clay to obtain a material B; adding the material B and dispersing agent into water, and uniformly stirring and mixing to prepare a glaze slip; and applying the glaze slip to the surface of ceramics, and firing to obtain the yttrium zirconate microcrystal ceramic glaze having a photocatalytic function. According to the invention, the ceramic glaze is prepared through a firing process and does not need coating, so that the prepared functional ceramic glaze material can be tightly combined with a ceramic matrix; and the photocatalyst Y2Zr2O7 generated in the sintering process of Y2O3 and ZrO2 is uniformly distributed in the glaze material, thereby avoiding the condition that the aesthetic property of the glaze material is influenced due to a rainbow effect.

Fused silica ceramics plays demanding role in high velocity missile / aircraft'radome development. Slip casting is the most common and commercially viable process utilized for radome production. Unfortunately slip casting cannot afford high density due to its poor green packing density which in turn results in poor rain erosion resistance. Present invention discloses process for preparing high density fused silica bodies by adding boron oxide (B2O3) with the commercially available high purity fused silica as sintering aid cum de-vitrification inhibitor. Various concentrations of B2O3 were added to high purity fused silica. Thus formed compositions were made into slip-castable slurries in aqueous medium without any addition of dispersing agents. The reheological properties like mild shear thinning and low thixotropic behaviour of the slurries were established. These slurries were then slip-casted in plaster of parries mold. The green and sintered properties of the casted samples were studied. The sintered sample with density higher than 2 g / cc (90-95% of the theoretical density) was achieved without de-vitrification. XRD studies on sintered samples showed the amorphous nature of the sample. The improved properties of fused silica system can favor its utilization in radome applications.

The invention belongs to the field of ceramic glaze spraying, and particularly relates to a ceramic glaze spraying device with a dust collection function, which comprises an upper partition plate, a lower partition plate and an annular side plate rotationally arranged between the upper partition plate and the lower partition plate, and further comprises a power part for driving the annular side plate to rotate, the upper partition plate is provided with a glaze spraying assembly, the lower partition plate is provided with a mounting opening used for mounting ceramics, the glaze spraying assembly comprises a spray head and an annular driving part used for driving the spray head to rotate around the mounting opening, and the exhaust channel always corresponds to the spray head in direction. The exhaust channel corresponding to the direction of the glaze spraying nozzle is arranged on the annular side plate in an extending mode, dust collection treatment in the glaze spraying process is achieved, the exhaust channel always corresponds to the direction of the nozzle, it is guaranteed that the flow direction of sprayed atomized glaze slip in the glaze spraying process is accurate, and glaze spraying is more uniform.

Grouting molding hollow ceramic solar panel substrate green body drying equipment belongs to the ceramic green body drying equipment, which uses rotating steel rollers as the operating power, and the rotating steel rollers form the roller table, and ordinary ceramic slurry is grouted in the plaster mold to form hollow ceramics. The solar panel base blanks are placed on pallets and placed in a stack one by one. The stacks of pallets with wet hollow ceramic solar panel substrate blanks pass through the channel equipped with roller tables. The temperature and humidity in each section of the channel can be adjusted. The controlled airflow heats and dries the blank of the hollow ceramic solar panel substrate, which greatly improves the drying efficiency compared with the traditional drying room. The surface of the dried hollow ceramic solar panel substrate blank is sprayed with black porcelain slurry, and after firing, the surface is black. The ceramic layer is a black porcelain composite ceramic solar panel whose substrate is a hollow ceramic plate.

The invention relates to a high-temperature-resistant solar heat-collecting ceramic material and a preparation method thereof, which is composed of components containing the following weight percentages: SiC 35-55%, HfB 2 25‑45%, Al 2 o 3 -Y 2 o 3 ‑MgO composite sintering aid 10‑18%, B 4 C 1‑3%, carbon black 3‑8%, high temperature resistant SiC / HfB prepared by slip casting and pressureless sintering process 2 Solar collector ceramics. The use temperature of the high-temperature-resistant solar heat-collecting ceramics of the present invention is as high as above 1500° C., which can solve the problem of serious attenuation of high-temperature mechanical properties of the current solar heat-collecting ceramics. Moreover, the preparation method has simple process and high production efficiency.

The invention discloses a mold component for punch formation of sanitary ceramics and a punching system using the mold component. The mold component comprises a middle mold, a bottom mold, a left mold, a right mold and a top mold; the middle mold is provided with a mold cavity; the bottom of the mold cavity is covered by an elastic molding part; the mold cavity of the middle mold is used for bearing ceramic powder; the bottom mold is provided with a lower punching part; the left mold is provided with a left punching part; the right mold is provided with a right punching part; the left mold andthe right mold are used for punching; the top mold is provided with an upper punching part; and the top mold and the bottom mold are used for punching. The punching mold component is used for punch formation of a blank body; and due to increment of pressure, the density of the blank body is much larger than that of the slip-cast blank body, the deformation rate of a prepared finished product is reduced, and the compression resistance is improved.

A composition comprises at least one form of attapulgite present in a solid weight fraction amount ranging from 0.25% to 5%; kaolin present in a solid weight fraction amount ranging from 17% to 50%; and optionally Ball Clay in a solid weight fraction amount ranging from 0% to 25%. Although makeable by other processes, in some embodiments, the composition is makeable by mixing component ingredients. Although usable for other purposes, in some embodiments, the composition is used to make ceramic pieces, e.g., via casting, pressing, jiggering or jollying, especially when the slip has solids, chemistry and viscosity suitable for shaping before drying, sintering, and optionally finishing.

The invention discloses a metal glaze prepared from iron impurities recovered from sanitary ceramics. The metal glaze comprises the components: quartz, iron phosphate, aluminum oxide, calcite, albite,kaoline, glass powder, iron impurities recovered by using a sanitary ceramic iron removal process, copper oxide and sodium carboxymethyl cellulose, wherein the particle sizes of the iron impurities recovered by using the sanitary ceramic iron removal process are 100-250 meshes. The invention further provides a method for preparing metal glaze from iron impurities recovered from sanitary ceramics,and the method comprises the steps: sieving, calcining and grinding the iron impurities recovered from sanitary ceramics, then, mixing the iron impurities recovered from sanitary ceramics with othercomponents, and carrying out ball milling to obtain glaze slip; spraying the glaze slip on the surfaces of the sanitary ceramics; and carrying out high-temperature firing to form a metal glaze layer with a bronze metal texture. On one hand, the recycle of sanitary ceramic iron removal wastes is realized, and the energy source is saved; and on the other hand, an individual sanitary ceramic productis obtained, and the demand of diversification is met.

The invention relate to the technical field manufacturing glass, pottery or other ceramics, in particular to a furnace charging device. The furnace charging device comprises a melting pot, wherein a heating part is arranged at the lower part of the melting pot; the upper part of the melting pot is provided with a power device and a charging part for charging materials into the melting pot; the melting pot is also provided with a material taking port; the charging part comprises a charging barrel and a heat conducting pipe, one end of the heat conducting pipe is communicated with the charging barrel, and the other end of the heat conducting pipe extends into the melting pot; the end, extending into the melting pot, of the heat conducting pipe is arranged far away from the material taking port; a piston is in slip connection in the charging barrel, and the top surface of the piston is connected with a piston rod driven by a power device to move up and down; the bottom surface of the piston is connected with a crushing part for crushing glass; a screen mesh is also arranged in the charging barrel; and the side wall of the charging barrel is provided with a charging port with a cover,and the charging port is positioned between the piston and the screen mesh. According to the technical scheme, the residual glass melt or glass fragments in the melting pot can be prevented from splashing out of the melting pot when glass blocks enter the melting pot.

The invention relates to a preparation method of a yttrium zirconate microcrystal ceramic glaze having a photocatalytic function. The preparation method comprises the following steps: preparing quartz, potash feldspar, albite, borax, Y2O3, Suzhou clay and lithium carbonate, keeping the above raw materialsat 1270-1290 DEG C for 20-40 minutes, taking out, pouring into water, quenching to prepare a fusion cake, and grinding the fusion cake to obtain a material A; preparing the material A, Y2O3, ZrO2 and Suzhou clay to obtain a material B; adding the material B and dispersing agent into water, and uniformly stirring and mixing to prepare a glaze slip; and applying the glaze slip to the surface of ceramics, and firing to obtain the yttrium zirconate microcrystal ceramic glaze having a photocatalytic function. According to the invention, the ceramic glaze is prepared through a firing process and does not need coating, so that the prepared functional ceramic glaze material can be tightly combined with a ceramic matrix; and the photocatalyst Y2Zr2O7 generated in the sintering process of Y2O3 and ZrO2 is uniformly distributed in the glaze material, thereby avoiding the condition that the aesthetic property of the glaze material is influenced due to a rainbow effect.

The invention relates to a simulated marble glaze, a ceramic product with the simulated marble glaze and a preparation method and belongs to the technical field of ceramics. The simulated marble glaze comprises the following raw materials in parts by weight: 23-26 parts of potassium feldspar, 19-23 parts of quartz, 7-11 parts of talc, 12-17 parts of waste ceramic powder, 6-10 parts of limestone, 26-35 parts of Longyan kaolin, 9-11 parts of zirconium oxide and 4-7 parts of chitin. The ceramic product with the simulated marble glaze is prepared according to the steps of pre-treating, ball-milling, regulating glaze slip, spraying glaze and burning; the glaze surface is high in quality and high in strength; the ceramic product has excellent antibacterial and anti-stains capacities and is suitable for the places, such as, kitchen and shower room; the production cost is lowered, the energy is saved, the emission is reduced and the ceramic product is green and environment-friendly.

The invention discloses a preparation method of sand glazed sanitary ware, 19.5-29% by mass of potassium feldspar, raw materials of 18.5-19.9% by mass of quartz, 8.5-9.9% by mass of alumina, 6-12% by mass of dolomite, 3.5-4.5% by mass of zinc oxide, 3-4% by mass of kaolin, 18-28% by mass of wollastonite, 10.1-11% by mass of zirconite are filled in a ball mill, wherein ignition lost is 4.13-6.76%, a proper amount of sodium carboxymethyl cellulose is added, water is added for ball milling, the ball milling is stopped until slurry with the particle size smaller than 10 mu m accounts for 59 to 63%, the slurry is sieved with a 100 mesh sieve, the slurry is deironed for 3 to 6h, and the property of glaze slip is adjusted until the concentration of the glaze slip reaches 1.76+ / -0.02g / cm<3> to obtain uniform sand glaze slip, the uniform sand glaze slip is sprayed on the surface of a sanitary ware blank, the sanitary ware blank is fed in a kiln for first firming at 1200-1250 DEG C to obtain a sand glazed sanitary ware product. A prepared glaze layer can form a sparkling effect similar as river sand and sea sand under light, and the prepared glaze layer is safe, non-toxic, good in anti pollution performance, high in mechanical strength, and suitable for application in the field of sanitary ware.