What is the composition of bone China

What is the composition of bone China? Composition of bone China main meal. Bone powder divided into animal bone and bone powder plant, animal bone meal refers to those carnivorous animals bone meal, bone meal refers to people who plant vegetarian meal. Tangshan ceramics co. , LTD. , the production of bone China products are all made of animal bone, after degreasing and calcined to get clean bone meal, add to the ceramic raw materials. Let's learn more about it! Raw material is the basis of ceramic production, making master fine porcelain for daily use, such as bone China will need to start from the good raw materials. As the name suggests, the main raw material of bone China is bone, in addition to the bone, there are two kinds of raw materials: one kind is mineral raw materials, mainly include quartz, feldspar, kaolin, etc. , mainly used for the body; Another kind is chemical raw materials, such as borax, boric acid, light calcium carbonate, etc. , as a glaze with raw materials or auxiliary materials, body and other small amount of water, alkali glass powder, sodium humate as auxiliary materials, etc. Bone is the main raw material of bone China, usage can be up to the whole body 40% 50%, is the main source of calcium phosphate in bone China. The quality of the bone and dosage of the color of bone China products, transparency and sintering temperature and intensity has a great influence, etc. Traditional bone China generally use animal bone meal as raw material, now have the use of synthetic bone bone porcelain, the texture and performance with the traditional bone China, and even some indicators is better than that of traditional bone China. Animal bone meal is a vertebrate bones after degreasing, calcining process, such as the product of its main composition is hydroxyapatite, otherwise a small amount of calcium fluoride, calcium carbonate, magnesium phosphate, etc. Bone meal is used in the production of cattle, sheep, pigs and other animals bones in 900 - first Under the 1000 ℃ steam cooking degreasing, then in the 900 - Under the 1300 ℃ calcination, after fine grinding ball mill, then through water or acid pickling, in addition to iron, obtained after drying. In order to avoid carbonization were black, bone block calcination must well ventilated. General bone residue after extracting collagen bone glue factory, also can use. Bone meal as raw material itself is of refractory, calcium phosphate melt temperature can reach 1720 ℃, but in the ordinary clay billet bone quantity is small ( 2% - 20%) Can be used as a kind of strong flux. British people think, 2 - The mavericks bone bone China good 4 years old. Experiments show that the bone porcelain at higher temperature, the pig bone is slightly lower than the bone into a porcelain temperature, sheep bone is lower. Sheep bone plasticity is good, easy to shape, but the whiteness is better than cattle bone, bone is the raw material of beautiful, sheep bone times, pig bone is poor. Synthetic bone meal has a variety of methods, the current domestic application for the synthesis of zibo in shandong region. The producing method is using calcium hydroxide and phosphoric acid neutralization reaction, after the 1280 - 1300 ℃ high temperature calcination and the formation of animal bone meal composition of synthetic materials. The production steps for: ( 1) Will be made calcium hydroxide calcium emulsion; ( 2) According to calculations, when it is used for mixing, will even join the slaked lime emulsion, phosphate get white sediment; ( 3) Will the white sediment dehydration, drying, at about 1300 ℃ calcination, powder obtained is the synthesis of bone. Synthetic bone meal for the selected raw materials for the pure industrial chemical raw materials, therefore, made the purity of product is higher, the content of calcium phosphate is also high, in body formula usage is usually 40% 45%. Containing phosphate rock is similar to chemical composition of bone apatite, therefore make bone China part instead of bone meal and transparency can be obtained very good body, but easy to deformation. It contains the amount of fluorine, used as a blank, always have pinhole, bubble or Yin phenomenon, must pay attention to when choosing a raw material, now is rarely used in practical production apatite bone China. Introduces a small amount of apatite in feldspar glaze and improve glaze glossiness, glaze is soft, but unfavorable and overmuch, such as phosphorus pentoxide content exceeds 2%, make the glaze easily occurred pinhole, defects such as bubbles, it will improve the melting temperature of the molten glaze glaze through the above introduction, believe that consumers are the composition of bone China and firing process has the understanding. The choice of bone China, bone meal and matching is the key. Tangshan ceramics co. , LTD. , focusing on bone porcelain production, with foreign advanced production equipment, is committed to create superior bone China product! Welcome to the choose and buy!