Bone porcelain firing and polishing 5

(4) burning kiln furniture and loading ways of the biscuit firing an issue copying bowl is not appropriate, also easy to cause deformation. When he's burning up some bone China products, because of the kiln is not straight or kiln car running instability, occurred during the operation of deviation, also can cause deformation defects. To copy burn round buckle sagger, as far as possible using ball coronary, any section because the ball is round, so even if bone porcelain products in the operation of the some deviation from the mouth, but it is always in a perfect circle slice, can guarantee its neat degrees. Kiln furniture not neat will also cause deformation, therefore, bone China, Bone China) The requirements of kiln furniture is very high, kiln furniture is bone China & other; Rules & throughout; , kiln furniture not neat, bone porcelain products must be neat. (5) isolation coating problem isolation is one of the factors influencing the biscuit firing deformation is very important. Bone China ( Bone China) Directly on the kiln furniture may occur adhesive, generally use alumina and part of clay configured to kiln and kiln furniture adhesive coating to prevent bone porcelain products. Coating use, if irregular and uneven coating will make kiln furniture surface deformation can cause bone porcelain products. Coating on coarse particle refractory or waste porcelain and direct contact with plain blank, also easy to cause deformation defects. ( 2) Cracking bone porcelain product shape design is unreasonable, turning surface too prone to cracking. Bone China products kiln when moisture content is higher, or uneven drying burn it also easy to cause element cracking buckle, bone China billet weight amount is larger, the mouth will also hold crack ( 3) Billet bubble bone porcelain body mix impurities or burnt will appear blank, after polishing can cause subsequent handling brown eye defects ( 4) ShengShao or burnt bone China ( Bone China) The firing range is relatively narrow, if the temperature control is not good, prone to defects such as ShengShao or burnt, bone China, Bone China) Burnt according to different degree, the general expression for & other; Sweat & throughout; And soft collapse, etc. Bone China ( Bone China) Although ShengShao also can have good penetrability and whiteness, due to the burnt beyond repair, in the pursuit of yield, multiple choice & other; Better less than too & throughout; Method, the temperature lower firing. ShengShao body had a great influence on the follow-up process, such as glaze is easy to crack after burn. Glaze after burn if placed in the damp environment for a long time, and bake flower decoration, there will be a fine, patchy & other Spray foam & throughout; Phenomenon, reduce bone porcelain glaze become rough, quality ( 5) Dirty point bone porcelain clay material mixed with iron impurities, will emerge after the biscuit firing, become dirty point defect. Sometimes poor refractory kiln furniture, especially iron more kiln furniture will pollution bone porcelain body, cause dirty point defects ( 6) Green bone quality has a problem or biscuit firing in reducing atmosphere, easy cause bone porcelain body appear the phenomenon of green bone porcelain glaze burning defect analysis and solution ( 1) Bone porcelain glaze with brown eyes glaze dip with brown eyes is burning glaze is difficult to analyze the defects of common defects. Mainly from the source of the gas analysis is as follows (1) not burn glair layer after drying particles between the gas (2) the bone porcelain glazing agitation and into gas (3) in the firing process, material, released by decomposition gases, such as carbonate, clay, talc and organic fluoride, residual quartz particles can keep air bubbles (4) firing process, some fall of kiln furniture material such as the destruction of the organic binder (5) 6 start melting temperature is too low, part of the water vapor closed under glaze 7) bone porcelain body is not fully dry adsorption of water in the frit ( 0. 1% ~ 0. 3%) — Tangshan bone porcelain cup dish to be continued. 。 。 。 。 。