一、汉代陶质文物粉化变脆的原因南阳汉代陶质文物主要包括硬陶、釉陶(黄釉、绿釉)和一般夹砂泥质红灰陶,其烧成温度大多在700℃—1000℃之间。其主要成分是粘土,即硅酸盐类,由于陶质文物长期埋藏地下,随着一年一度的气温冷暖,温度的干湿反复交替地变更,迫使粘土的盐类进行溶解、结晶,再溶解、再结晶的化学变化反复交替地进行。而在此过程中,便会有部分盐 First, the Han Dynasty ceramic artifacts crumbling brittle reasons Nanyang Han Dynasty ceramic artifacts include hard pottery, glazed pottery (yellow glaze, green glaze) and the general folder sand muddy red-gray ceramic, the firing temperature mostly in 700 ℃ -1000 ℃. The main component is clay, that is, silicate, as the long-buried ceramic underground artifacts, with the annual temperature of warm and cold, alternating wet and dry temperature alternately, forcing the salt of clay to dissolve, crystallize, redissolve The chemical changes of the recrystallization are alternately repeated. In the process, there will be some salt