Process for firing Ru porcelain having thread structure through nine-step method

Abstract

The invention relates to a process for firing a Ru porcelain having a thread structure through a nine-step method. The process comprises the following steps: shaping raw materials, producing a thread structure, and performing in-kiln biscuit firing to obtain a green body; and glazing the green body, and performing in-kiln glaze firing to obtain the finished product, wherein the content of aluminum oxide in the raw materials is 22-30%; the water content of the raw materials is 9.5-10.5%; and the glazing concentration of the green body is 60-64 Baume degrees. The in-kiln glaze firing is divided into the nine steps in the specification; and by strictly firing according to temperature and time parameters in each step, the shrinkage ratio of the fired porcelain is controllable, and the finished product is unified in rim thread specification and high in precision.

Description

technical field [0001] The invention relates to the technical field of ceramic processing, in particular to a nine-step firing technique for Ru porcelain with a threaded structure. Background technique [0002] Traditional ceramics not only have high hardness and high brittleness, but also lead to poor processing performance and high processing difficulty; moreover, due to the firing line shrinkage and considerable firing deformation of ceramics during high-temperature firing, the size and surface finish of initially fired ceramic products are often Can not meet the corresponding accuracy requirements. After the workpiece is fired to obtain the biscuit, ceramic grinding is generally required to obtain ceramic parts with dimensional accuracy and surface finish that meet the standards. In addition, due to the difference in water content, the content of various chemical components and the concentration of glaze, the shrinkage ratio of traditional ceramics cannot be controlled ...

AI Technical Summary

Problems solved by technology

In addition, due to the difference in water content, the content of various chemical components and the concentration of glaze, the shrinkage ratio of traditional ceramics cannot be controlled due to factors such as drying loss and glaze change during the kiln firing process. As a result, the thread fired on ceramics is far behind the expected specifications after being formed, and cannot be used directly. Therefore, the existing thread processing technology on ceramics is generally mechanically polished after ceramics are fired and formed. Grinding out the thread, which has met the specification requirements of the use

However, considering the hardness and plastic toughness of ceramics, the hardness of ceramics is high, but the plastic toughness is extremely poor, which makes it laborious to mechanically polish ceramics. At the same time, ceramics will break if you are not careful, and the yield is extremely low. , so this kind of mechanical grinding ceramic thread processing method is extremely inefficient and not advisable in modern production

[0003] In addition, the traditional ceramic firing process is generally divided into three stages, namely the "drying stage" of the initial temperature rise, the "kiln transformation stage" of the high temperature process, and the "cooling stage" of the slow temperature drop. General ceramic devices can be used universally. However, in the face of the firing of ceramic threads that need to consider the shrinkage ratio, this traditional firing process is not advisable, and the yield is almost zero. Therefore, how to control the shrinkage of the ceramic firing process It is imminent to solve the one-time firing molding of the thread on the ceramic