Recipe of high temperature hard glaze for bone china and bone china producing process

Abstract

The present invention is recipe of high temperature hard glaze for bone china and bone china producing process. The recipe of high temperature hard glaze for bone china consists of quartz, feldspar, talc, ceramic powder, calcium carbonate, dolomite, kaolin and clinker. The bone china producing process includes the first step of spraying high temperature hard glaze for bone china in the front face of dried biscuit, supporting the back of the biscuit with sagger to avoid deformation and sintering in kiln at 1270-1280 deg.c; and the second step of spraying low temperature glaze to the back of first sintered piece and sintering for the second time in the glaze kiln at 1050-1160 deg.c. The bone china product of the present invention has high glaze surface hardness, high strength, high heat stability and no lead contained. The present invention is suitable for produce various kinds of household china products.

Description

Technical field:

[0001] The invention belongs to the technical field of chemical ceramic materials, in particular to the formula of high-temperature hard glaze for bone china and the production process of bone china. Background technique:

[0002] Existing bone china generally adopts high-lead glaze, one-time glazing, one-time glaze firing process, and the produced products contain high lead content, which is harmful to human body, and the glaze surface hardness of ceramic products is poor. The strength of the parts is low, the thermal stability is poor, and the product is easily deformed. Because the amount of lead dissolved in the product exceeds the standard, the export of daily-use ceramic products is greatly restricted. Invention content:

[0003] The purpose of the present invention is to address the shortcomings of the above-mentioned existing bone china products, to provide a method to solve the problem of excessive lead in bone china glaze, improve the hardness o...

Examples

Embodiment approach

[0007] Below by embodiment the present invention will be further described:

[0008] A high-temperature hard glaze formula for bone china and a production process for bone china. The maximum weight percentage range of the material components of the high temperature hard glaze formula for bone china is: quartz 15---30%, feldspar 30---50%, talc 3---10%, porcelain powder 5--- 25%, calcium carbonate 5---15%, dolomite 3---10%, kaolin 3---10%, frit 3---8%; the preferred range is: quartz 15---25% , feldspar 35---45%, talc 3---8%, porcelain powder 5---10%, calcium carbonate 10---15%, dolomite 4---9%, kaolin 3--- 8%, frit 3---6%; the best range is: quartz 15%, feldspar 42%, talc 4%, porcelain powder 8%, calcium carbonate 15%, dolomite 5%, kaolin 8%, frit Block 3%. The production process of bone china is as follows: the first step is to prepare the glaze slurry according to the material components of the above-mentioned high-temperature hard glaze for later use, mix and mix according...

Technical field:

[0001] The invention belongs to the technical field of chemical ceramic materials, in particular to the formula of high-temperature hard glaze for bone china and the production process of bone china. Background technique:

[0002] Existing bone china generally adopts high-lead glaze, one-time glazing, one-time glaze firing process, and the produced products contain high lead content, which is harmful to human body, and the glaze surface hardness of ceramic products is poor. The strength of the parts is low, the thermal stability is poor, and the product is easily deformed. Because the amount of lead dissolved in the product exceeds the standard, the export of daily-use ceramic products is greatly restricted. Invention content:

[0003] The purpose of the present invention is to address the shortcomings of the above-mentioned existing bone china products, to provide a method to solve the problem of excessive lead in bone china glaze, improve the hardness o...

Examples

Embodiment approach

[0007] Below by embodiment the present invention will be further described:

[0008] A high-temperature hard glaze formula for bone china and a production process for bone china. The maximum weight percentage range of the material components of the high temperature hard glaze formula for bone china is: quartz 15---30%, feldspar 30---50%, talc 3---10%, porcelain powder 5--- 25%, calcium carbonate 5---15%, dolomite 3---10%, kaolin 3---10%, frit 3---8%; the preferred range is: quartz 15---25% , feldspar 35---45%, talc 3---8%, porcelain powder 5---10%, calcium carbonate 10---15%, dolomite 4---9%, kaolin 3--- 8%, frit 3---6%; the best range is: quartz 15%, feldspar 42%, talc 4%, porcelain powder 8%, calcium carbonate 15%, dolomite 5%, kaolin 8%, frit Block 3%. The production process of bone china is as follows: the first step is to prepare the glaze slurry according to the material components of the above-mentioned high-temperature hard glaze for later use, mix and mix according...