Difficulties and common problems in the processing technology of zirconia ceramic grinding machines

Release time：2024-09-18click：0

In order to satisfy consumers According to the demand, Ceramic Technology Co., Ltd. uses professional ceramic grinding machines to meet the needs of< span style="box-sizing: border-box; transition: 0.5s;">Zirconium oxide ceramic Products are surface ground and polished. So what are the common problems in the processing technology of zirconia ceramic grinding machines?

Zirconia ceramic grinding What technical difficulties have machining engineers encountered:

Zirconia ceramic exists The three crystal forms are monoclinic zirconia, tetragonal zirconia and cubic zirconia, and these three forms will transform into each other as the temperature changes. Zirconium oxide ceramic Production requires the preparation of powders with high purity, good dispersion properties, ultra-fine particles and narrow particle size distribution, ultra-fine zirconia powders There are many preparation methods for zirconium oxide. The main purification methods of zirconium oxide include chlorination and thermal decomposition methods, alkali metal oxidative decomposition methods, lime fusion methods, plasma arc methods, precipitation methods, colloid methods, hydrolysis methods, spray pyrolysis methods, etc. Zirconia ceramics are white in color and turn yellow or gray when containing impurities. They generally contain HfO2 and are difficult to separate. Pure ZrO2 has three crystal states under normal pressure. The production of zirconia ceramics requires the preparation of powders with high purity, good dispersion properties, ultra-fine particles, and narrow particle size distribution. There are many methods for preparing ultra-fine zirconia powder. The main methods for purifying zirconia include chlorination and thermal decomposition, alkali metal Oxidative decomposition method, lime fusion method, plasma arc method, precipitation method, colloid method, hydrolysis method, spray pyrolysis method, etc. During the grinding movement, we know that as the grinding disc and the workpiece rub against each other, the temperature of the workpiece will gradually increase. When grinding is completed, the workpiece will gradually cool down. Undoubtedly, this temperature change may affect the crystal form of zirconia. change. However, according to the characteristics of zirconia, it will not convert into a square until it reaches 1100°C, and then into a cube during the cooling process. Therefore, as long as we control the temperature and avoid high temperatures, we can avoid this problem.

Ultra-thin zirconia Ceramics are easy to crack and collapse. Because it is a crystal material, if it is too thin, the workpiece will not be able to withstand the grinding force brought by the grinding equipment. It is very easy for the crystal to break during processes such as friction and extrusion. In this regard, Ceramic Technology Co., Ltd. adopted a new zirconia ceramic fixation method and tested the pressurization system. The perfect value of the fixation system enables the workpiece and the grinding disc to achieve the best fit, so that the zirconia ceramic will not bear any stress during grinding. Excessive grinding force causes the workpiece to break.

These technical difficulties are caused by the characteristics of zirconia itself , it can be seen that the characteristics and parameters of each workpiece affect the grinding equipment configuration, consumables, machine structure, and process procedures. From this, we can draw the following conclusion: The grinding of zirconia ceramics requires professional technology. Different zirconia ceramic materials require different grinding consumable materials and accessories for operation, and must not be confused.