13 display bone China defects

( 2) Bone China billet for too long, not timely glazing, bone China body surface viscosity oils, HanJi and dust and dirt. Bone porcelain glazing operation, filling water contaminated with oil in pot: or hydrating, pen is too dry, back and forth on the bone porcelain body friction, make the bone porcelain clay, dust mixed accumulation, no water. Usually caused by product and rolling glaze, because it is bone porcelain glaze slurry liquidity is not appropriate. If the poor liquidity bone porcelain body for more than after immersion and glaze is not easy to flow, product storage in the bottom of the bone porcelain body; On the other hand, the bone porcelain glaze slurry liquidity is too strong, bone China body after dipping, more than the glaze down too long both from the bottom of the glaze layer too thick, or a test in ( Just) Ceramic glaze glaze, the tool is easy to hurt, to firing, the injury of the surface of the surface tension and the shrinkage and shrinkage glaze ( 3) Bone porcelain glazing for too long, and place the humidity is too high; Or bone porcelain kiln, wet bone porcelain body moisture content is too high or grey box got wet by rain, humidity is big, thus stove rolled glaze bone porcelain products are easy to produce. To overcome the way: ( 1) Improve bone porcelain glaze chemical composition, can reduce bone porcelain clay content in the glaze formula, adding a small amount of K20, Ha2O, Ca0 and Zn0, reduce the high temperature viscosity of bone porcelain glaze, increase the liquidity of bone porcelain glaze, also can improve the gloss of glaze. Adjustment formula, reduce the material hard strong sex, make the bone porcelain glaze layer is relatively loose, easy to glazing. ( 2) Change the bone porcelain glaze with raw materials into the grinding fineness, slurries precipitation does not occur in the case, the appropriate bold to replace fine particle coarse particle. Introduction of feldspar, quartz, coarse crushing ore, can increase bone porcelain glaze slurry liquid, on the other hand, to replace coarse particles (fine particles To replace undressed ore blocks of wood processing or Raymond) , can reduce bone porcelain glaze liquidity, liquidity in case of inappropriate bone porcelain glaze can adopt coarse particle dispensing and additives to be adjusted. ( 3) Bone porcelain biscuit firing characterize or dry before glazing, brush to clean dust and sundries, and again after filling water bone porcelain glaze. Should pay attention to when filling water, not pen back and forth on the bone porcelain body friction, pen water right amount, on the body even read twice, qing hydrating too keep the water clean. Fill bowls in water twice a day, to prevent mud turbidity and oil pollution ( 4) Bone China body overheating can't glazing, under the condition of the bone porcelain of billet and the right, should be strictly controlled the proportion of slurries. Manual big bone porcelain products and plasma density can be appropriately reduced to 1. 38 - 1. 45. Decrease the bone porcelain glaze layer thickness, large glaze slurry concentration and dipping time can make the bone porcelain glaze layer thickening. Glaze slurry concentration, on the contrary, small and short time of dipping glaze layer is thin, stick to three thousand system, namely the blow dry billet repair, dry glazing, dry kiln. Biscuit firing glaze billet and cannot be stored for too long. ( 5) Strict control of firing humidity, especially intermittent kiln: winter cold, rainy season or kiln, pay attention to the temperature rising of temperature and moisture out. Stage should pay attention to the fire insulation, to the bone porcelain glaze to fully molten opportunities. Practice proves that the sintering system on the rolling glaze some influence. — Tangshan bone porcelain hotel furnishing articles to be continued. 。 。 。 。 。