Bone porcelain blank 13

(3) kaolin 15% ~ 30%, increase the stability of ceramic slurry. Sedimentary clay can increase body strength, such as datong, soil, etc. ; Native of clay improves hydrophobicity, improve the stability of large bone China products, should be appropriate to increase the plasticity of clay content, make bone China mud slurry at a slower pace, avoid eating fast fluctuation caused by non-uniform plasma; For small production, can reduce the plasticity of clay content increasing appropriately eat pulp speed, improve labor efficiency. Bone China ( 2) The granularity of bone China mud mud too thick, desert raw material prone to precipitation; Bone China mud is too thin, the moisture content is higher, is not only the ball mill for a long time, but also easy to cause demoulding difficulty, drying shrinkage, easy to crack defects such as bone China ( Bone China) Control the fineness of 10 & mu; M the following particles accounted for about 80% of large bone porcelain product is a bit rough, and small fine bone China products. Bone China ( 3) Liquidity of electrolyte type and quantity of bone China mud, thixotropy and moisture and electrolyte, in order to make the bone China mud has a lower water content and good liquidity and stability, in the case of clay and water corresponding, adjust the amount and type of electrolyte is effective way to improve mud performance. Depending on the clay around the use of sodium silicate, sodium humate, general powder, such as tannic acid sodium alkali to adjust, in the number 0. 5% ~ 0. 8%. Electrolyte too much easy to mold damage, reduce the service life of die, under the premise that meet the requirements of the use of bone China mud, electrolyte, the less the better. On slender bone porcelain products or components, such as bone CiHu mouth pot, the bone porcelain cup, could increase the amount of electrolyte, improve liquidity and increase yield now more and more importance to the use of organic polymer electrolyte, according to the relevant information can be bone porcelain clay grouting material moisture reduced to 20%, it is also a key research direction in the future. Bone China ( 4) Water is a key to grouting in the forming of medium, the bone porcelain in the mortar of injection water, the less the better, this is because the more moisture, bone China body drying shrinkage, the greater the probability of cracking or deformation. And, to eat and mold drying time, also can cause greater consumption, water is commonly 28% ~ 36%. The water quality is very important for mud property, generally tend to pay attention to the content of water and ignore the quality of water, different areas of water, different kinds of water had a great influence on mud properties of several common water situation is as follows. Bone China (1) deionized water deionized water containing calcium and magnesium ions rarely, is to regulate bone China mud performance good quality but cost is higher. (2) tap water as enterprise use tap water, its water quality is stable, but the cost is higher also. (3) Wells deep well water containing minerals is more, less organic matter; And shallow well with corresponding unstable minerals, organic matter, are greatly influenced by the climate. (4) surface water ( The lake, the river) Contain organic matter more, along with climate change is bigger, should not be used. (5) the rain the rain does not contain minerals, but contains a lot of air, easy to cause air bubble defect, cannot use when regulating bone porcelain mortar injection performance is bad, change water may be able to solve, this is also the general enterprise easily neglected problems. Bone China ( 5) Using the environment grouting forming more demands on production environment. Mud in 25 ~ 35 ℃, with good performance. Temperature is too low or too high will appear unfavorable demoulding, cracking and other defects. Preparation of new mud like the place again after all day mix used after degassing effect is better. Bone bone China porcelain pressing forming blank pressed powder preparation process performance requires a small amount of bone China, Bone China) A method can be adopted to suppress, required to suppress bone porcelain blank are as follows. ( 1) Bulk density is big, high packing density of the billet is its particle size distribution to appropriate, make the green density after suppressing big and homogeneous. Bone China ( 2) Fine bone China stock liquidity liquidity of stock is better, because it affects the powder filling model and filling speed, to the difficulty of the final relationship with bone porcelain body density and output. — Bone China tableware to be continued. 。 。 。 。 。