In layman’s terms: the utensils fired with clay are called pottery, and the utensils fired with china clay are called china. The utensils made of ingredients, molding, drying, roasting and other processes can be called ceramics. Ceramics include a wide range, some are water-resistant, and some are acid-resistant. Widely used in construction, chemical, electric power, machinery and other industries and daily use decoration, etc.
In addition, products made of materials other than clay according to the manufacturing process of ceramics are also called ceramics, such as talc ceramics, metal ceramics, capacitor ceramics, magnetic ceramics, etc. Widely used in radio, atomic energy, rockets, semiconductors, etc. Industry. At present, all ceramic products are generally referred to as “inorganic non-metallic solid materials.
Pottery and porcelain are daily necessities that people often come into contact with. Sometimes they look similar on the surface, but after all, they have their own characteristics and differences.
Pottery is generally made of clay. The temperature of firing pottery is generally between 900-1050 ℃. If the temperature is too high, the pottery will be burned and deformed. The matrix of pottery is relatively loose in texture and has many pores, so it has strong water absorption. The surface of ordinary pottery is unglazed, even if it is glazed, it is low temperature glaze.
The history of firing pottery in my country is about 10,000 years old. In primitive society, pottery was first made into a certain shape by hand-kneading. Later, it developed into rubbing the clay into mud strips of the same thickness, and then the mud strip was built into a certain shape, and the inside and outside were smoothed by hand. . At the stage of patriarchal society, the rotation system appeared. After entering the feudal society, the molding method was invented, that is, the clay was filled into the mold and the full shape of the utensils was released. It is speculated that the most primitive firing method is the heap firing method, in which the sun-dried pottery blanks are burned in the open firewood. Six or seven thousand years ago, pottery kilns were used to make pottery.