Bone porcelain firing with polished 4

Fritted glaze especially lead fritted glaze ceramic glaze or prone to certain components of the volatile, and the bone porcelain glaze composition of volatile sometimes have a big impact, good glaze burned bone porcelain products can in a saturated atmosphere containing glaze kiln firing. Therefore, the more volatile bone porcelain glaze adopt the method of loading box firing glaze to burn, and not with bone porcelain saggar within product contact parts and saggar to brush at the bottom of the fritted glaze, to play the role of protective atmosphere. Long-term use of glaze kiln kiln wall will appear a layer & other; Glass & throughout; Layer, sometimes even from the kiln head onto the kiln car, glaze using old kiln to burn, the glaze effect is better is the cause of furnace atmosphere saturation is higher. Polishing and polishing technology is bone China ( Bone China) Represented by the high temperature burning, low temperature glaze firing process of secondary peculiar, it is a finger bone porcelain body temperature after the porcelain, using fine sandpaper, emery cloth or vibration polishing machine, the bone porcelain body smooth of polishing process. Bone China body after fettling burning will stick some impurities in the handling process, due to coating isolation coating on the kiln furniture, after firing, the coating material may be glue on the bone porcelain body, if direct glazing can appear many defects, which requires the bone porcelain body for polishing. Polishing is generally divided into manual polishing and mechanical polishing. For some sophistication and local fine or thin brittle bone China products, such as bone China hip flask, thin bone China tureen perishable products, such as good use sand paper ( Cloth) Manual polishing. Products of some relatively thick, high strength, vibration polishing machine, grinding media can use porcelain quality silicon carbide, oak, piece of quartzose and so on. Firing defects and solution seeking treasure bone China is a fire, a lot of problems to the firing to see. Bone China products tend to appear multifarious after firing, all kinds of defects, from raw material to the burnt slightly wrong can cause defects in a series of processes, or even scrapped. Some of these defects are exposed to not burn before; Some in a latent state before burning, once firing which exposed; Some is burned into inappropriate. This section is only common firing defects are analyzed. Biscuit firing defects analysis and solution ( 1) Deformation skewed bone China products, skew, newborn, flat mouth and under convex concave on the bottom of irregular deformation defects referred to in the form of secondary firing process than a firing process significantly reduce the deformation of the product, but because the formula composition, shape, the shape, sintering, kiln furniture and seting method, the influence of such factors as still have a lot of deformation defects. Formula (1) design problem formulation firing range is narrow, the bone porcelain body is more easily soft collapse at high temperature, it is easy to cause the biscuit fire burnt soft collapse deformation. (2) the forming problem in some grouting cut bone China products, mouth stress non-uniform, uneven local stress, high temperature when released, cause deformation, such as cylinder, juice, milk bucket, etc. Some uneven bonding parts with mud, after burning, also can appear deformation defects, such as bone CiHu mouth, bone porcelain cup the skew (3) the shape design problem for bone China ( Bone China) Body soft easy soft collapse deformation at high temperature, so the shape design is also key, such as some bone porcelain class design, lack of support at the bottom of the surface, easy to cause deformation. — Tangshan bone porcelain tableware wholesale to be continued. 。 。 。 。 。