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 Wysłany: Nie 1:22, 09 Sty 2011 Temat postu: Glazed main cause of defects and ways to overcome |
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Glazed main cause of defects and ways to overcome
As follows: SiO20.05 × 10 per ℃,[link widoczny dla zalogowanych], the line A12030.17BO, 0.66 (small amount) Na2O4.32K2O3.90PbO1.06ZnO0.07CaO】. 63MgO0.45BaO1.74 actually effective alternative method to correct for the glaze crack: (1) increasing the silica, alumina and silica at this time should be also added to prevent loss through glazing; added slightly after the firing temperature increased to reduce the alkali and alkaline earth metal oxides (flux) of the amount; or change the type of flux, such as the use of talc or dolomite instead of limestone. (2) reduce the feldspar. (3) reduce any material containing Na or K. (4) the other components remain unchanged, reducing the increase of silica acid. (5) increasing the lead oxide, or lead to substitution with Na \ K materials. Adjustments to prevent the glaze will crack adobe. (1) reduction in the plasticity of the clay bowl blank weight, while increasing the amount of quartz and silica sand. Adding quartz powder green body, whose role is heated to 573 ~ C o 【when the quartz crystal into a B, so that a slight increase of green body size,[link widoczny dla zalogowanych], miniature size of the cooling Shiyou the green body, leaving the glaze into compression in the subject. Quartz content between 10% to 25% more appropriate. (2) If the green body is kaolin, can be used to replace part of the plasticity of clay. (3) to reduce the amount of feldspar. (4) adding talc, the green body expansion rate increases,[link widoczny dla zalogowanych], in order to prevent the glaze crack, add the amount to 7% or less. Enamel defects not completely is extremely rare. But to grasp the above method, if the glaze bubbles appear glazed, glaze crack defects,[link widoczny dla zalogowanych], may be situation-specific,[link widoczny dla zalogowanych], select the process or change the composition of the ways to overcome it, and basically get a good glaze. Received date :2002-12-30 <<<<<<<<<<<<<<<<<<<<< <<<<<<<<<<<<<<<<<<<<<<<<< <<<<<<<<<<<<<<<<<<<<<<<<< <<<<<<<<<<<<<<<<<<<<<<<<< <\It is light weight, high strength, easy construction, materials, etc. Province. With the same diameter solid wall pipe can be saved compared to about 40% of raw materials. Fiber optic cable is widely used in communications, municipal drainage, irrigation and other agricultural areas of low pressure. As a high-tech. China since the 20th century, early 90's introduction of international advanced technology. Initially mainly in small-bore diameter l10mm the following series of mainly raw materials for PVC. Mainly used for communication cable sheathing. After l0 years of production technology to digest and learn about its properties. Gradually to the direction of large diameter, the use of raw materials from PVC to the development of PE, HDPE and so on. Corrugated pipe production equipment from the current introduced into the domestic, PVC pipe may be the largest diameter of 500mm. HDPE pipe can be the largest diameter of 800mm. Diameter can be done abroad, 1200-1800mm. According to the statistics. Currently there are introduced to design production lines and the domestic production of double-wall corrugated pipe production line more than the total number of about 200, including PVC pipe production equipment accounted for 80%, HEPE, PE pipe production equipment accounted for 20%. The main production varieties: large-diameter pipe diameter 300800mm 20%, diameter of 160mm diameter pipe less 80%, the production process generally: a high-mix ingredients mixed with a screening of a low-ripple one out of a cut into a shape of a certain extension mouth. According to market analysis. In the \
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