The chemical grilled steak a ceramic tableware!

The history of ceramics is an important part of Chinese civilization. Since the eastern han dynasty invented porcelain in China, people will quickly realize its superiority. The bronze ware and lacquer then gradually eliminated, while China is a growing trend developed rapidly. From the eastern han dynasty to the qing dynasty, one thousand eight hundred years, the fire porcelain kilns all over the country. These kilns, according to the local raw materials resources situation and their own technical expertise, creating hundreds of new varieties of glaze, in people's life more and more extensive application of plant, as both the practical value of the commodity, and art appreciation value. In English the meaning of 'China' from China, and the meaning of ceramics, clear that China is the home of 'ceramic'. In modern times, ceramic tableware as an important food contact materials, and the use of the world has a long history in China. Its modelling beautiful, elegant color, feel is smooth, easy to wash and wear resistance, high temperature resistant, acid and alkali corrosion resistance and other advantages, loved by consumers. Today small make up take you to take a look at how the ceramic tableware is made. A, ceramic components in terms of the south, especially in jiangxi, zhejiang, anhui, fujian area is rich in China stone, also produce kaolin in some places. China stone and kaolin are the main porcelain making raw material in the southern area. The main components of the China stone porcelain stone is some variety of granite ( Such as felsic rocks and normal felsic rocks, etc. ) By the late hydrothermal and generate the product of change, the main mineral composition is white mica and quartz sericite, water, and sometimes a small amount of calcite. Sericite: chemical formula for K0. 5 - 1 ( 铝、铁、镁) 2 ( SiAl) 4O10( 哦) 2 nh2o layered structure of silicate; The water white mica, K < 1 al2 [ ( SiAl) 4 o10] ( O) nH2O——2; Quartz: composed of silica minerals, chemical formula SiO2. Calcite: the main components of the CaCO3 kaolin kaolin is the main mineral composition of kaolinite, the rest were water kaolin and mica mineral. Kaolinite: it is a kind of hydrous aluminum silicate, 2 al2o3 · 4 sio2 · 4 h2o; Much water included: the Al4 [ Si4O10] ( 哦) 8 · 4 h2o 2, pottery and porcelain in the process of making changes in clay chemical changes occur in the process of grouting: CaSO4 and Na - in the mud Clay and silicate ion exchange reaction: Na - Clay + CaSO4 + Na2SiO3 - Ca - Clay + CaSiO3 left + Na2SO4 gypsum flocculating agent role, promote the mud flocculation hardening, shorten into bloom time. Clay in the firing process produces chemical reaction, generally has the following categories: (1) the decomposition of the crystal water: ceramics production materials in addition to surface water, there would be some compounds containing crystal water, different material will contain some compounds with crystallization water inside, such as kaolinite ( 4SiO2 baha 4H2O baha 2Al2O3) When they are heated to a certain temperature crystallization water decomposition, gasification, volatile; (2) some carbonate decomposition: calcite decomposition happens under heated to a certain temperature, CaO and CO2 is generated; (3) different oxide solid instead should be generated between the low melting point compound: the different proportions of silicon calcium magnesium aluminum oxide at different temperature can form different mineral structure, spinel, feldspar, scapolite, pyroxene, etc. , this is more complex, at present are generally by two yuan, three yuan, or $4 phase diagram to determine, many formula is confidential; (4) if you use raw materials special there may be some special reaction, such as fluoride, mercury, arsenic, etc. Source: website administrator