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Manufacturing method of bone china

A manufacturing method and technology of porcelain, applied in the field of ceramics, can solve the problems that cannot be oxidized and volatilized in time and deposited on the surface of porcelain with little glaze or no glaze, manual grinding and polishing can be used as finished products, and can be downgraded to waste products, etc., achieving significant social and economic Efficiency, increased transparency, and improved quality

Active Publication Date: 2018-06-29
JIANGSU GAOCHUN CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the amorphous carbon contained in bone charcoal is relatively high, and it is easy to ooze out during the firing process. Due to the high firing temperature (above 1100°C) in the process of biscuit firing and glaze firing, the oozing carbon can be oxidized and volatilized. , will not deposit on the surface of porcelain, but in the process of baking flowers, due to the low furnace temperature (about 800 ℃), the oozing carbon cannot be oxidized and volatilized in time, and deposits on the surface of porcelain with little or no glaze, resulting in blackening Phenomenon, the blackened porcelain must be manually polished and polished before it can be used as a finished product. In serious cases, it will be directly downgraded to waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 72wt% bone charcoal powder and 28wt% quartz powder evenly, carry out pre-sintering at 1320°C, and pulverize the cooled sintered product as raw material for making bone china.

[0020] Take 58 parts of crushed raw materials after pre-sintering, 8 parts of feldspar, and 34 parts of clay, mix them evenly, ball mill them into a slurry, pass through sieving, pressure filtration for dehydration, aging, vacuum mud refining, molding, drying, and then bisque firing at 1280°C After glazing the bisque-fired blank, it was glazed and fired at 1150°C, and after the glaze was fired, the bisque was decorated with decals or painted, and then baked at 820°C to obtain 200 pieces of finished bone china, 178 pieces of first-class products, There is no phenomenon of anti-blackening of roasted flowers in one piece.

Embodiment 2

[0022] Mix 67wt% bone charcoal powder, 23wt% quartz powder, and 10wt% feldspar powder evenly, pre-sinter at 1300°C, and pulverize the cooled sintered product as raw material for making bone china.

[0023] Take 64 parts of crushed raw materials after pre-sintering and 36 parts of clay, mix them evenly, ball mill them into a slurry, pass through sieve, press filter for dehydration, stale, vacuum mud, molding, drying, then biscuit firing at 1280°C, and glaze the biscuit body Finally, glaze firing at a temperature of 1150°C, decorate the glazed bisque porcelain with decals or painted decorations, and then bake it at a temperature of 820°C to obtain 200 pieces of finished bone china, 184 pieces of first-class products, and none of them appeared baked. Flower anti-black phenomenon.

Embodiment 3

[0025] 72wt% bone charcoal powder, 28wt% quartz powder, plus 0.8wt% K 2 O is the mineralizer mixed evenly, pre-sintered at 1280°C, and the cooled sintered product is pulverized as raw material for bone china.

[0026] Take 64 parts of crushed raw materials after pre-sintering and 36 parts of clay, mix them evenly, ball mill them into a slurry, pass through sieve, press filter for dehydration, stale, vacuum mud, molding, drying, then biscuit firing at 1280°C, and glaze the biscuit body Finally, glaze firing at a temperature of 1150°C, decorate the glazed bisque porcelain with decals or painted decorations, and then bake it at a temperature of 820°C to obtain 200 pieces of finished bone china, 182 pieces of first-class products, and none of them appeared baked. Flower anti-black phenomenon.

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Abstract

The invention discloses a manufacturing method of bone china. The manufacturing method comprises following steps: proportioning part of raw materials, which comprise at least one of bone charcoal power, quartz powder, and feldspar powder, of bone china according to the formula of bone china; evenly mixing; pre-sintering the raw materials at a temperature, which is not lower than a biscuiting temperature; grinding the pre-sintered substance to obtain a production raw material of bone china; and performing steps of blending, ball-milling (to obtain slurry), sieving, press-filter dehydrating, aging, vacuum mud mixing, moulding, mould drying, biscuiting, glaze firing, and decoration firing. The manufacturing method can reduce the deformation of bone china during the burning process, radicallyeliminates the phenomenon of blackening of bone china during the decoration firing process, improves the quality of bone china, increases the ratio of top quality products, and creates more economic benefits. The provided manufacturing method can be used to produce other ceramic products, which have better and more stable quality.

Description

technical field [0001] The invention belongs to the technical field of ceramics, and in particular relates to a pre-sintering method in the manufacturing process of bone china. Background technique [0002] Bone china is porcelain made by adding herbivorous animal bone charcoal powder to ceramic raw materials. Bone china is characterized by light texture, fine and hard, not easy to wear and tear, high whiteness, good transparency, crystal clear, white and translucent under the irradiation of visible light. Bone china is famous both at home and abroad for being "thin as paper, white as jade, bright as a mirror, and sound like a chime", and is the best in ceramics. At present, bone charcoal is obtained by degreasing, degumming, and burning at high temperature from the bones of herbivores in the absence of air. The main components of bone charcoal are tricalcium phosphate, amorphous carbon and other inorganic salts. The manufacturing method of bone china is similar to that of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/34
CPCC04B33/132C04B33/34C04B35/62645C04B2235/3201C04B2235/3418C04B2235/3463C04B2235/656Y02P40/60
Inventor 陈春明顾永成孔祥杲
Owner JIANGSU GAOCHUN CERAMICS
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