Low-temperature semi-white porcelain and its manufacturing method

Abstract

The invention discloses a low-temperature semiwhite porcelain and a manufacturing method thereof, belonging to the technical field of ceramics. The blank of the low-temperature semiwhite porcelain comprises the following raw materials in parts by mass: 30-40 parts of Longyan clay, 25-35 parts of Gangxi kaolin raw ore, 20-28 parts of flint, 7-12 parts of feldspar, 2-9 parts of talcum and 5-10 parts of dolomite. The low-temperature semiwhite porcelain can be quickly fired at the low temperature of 1000 DEG C, and can be discharged out of the kiln only by 7-8 hours from firing to cooling. The linear shrinkage is low and can be kept at 12% or below. The low-temperature semiwhite porcelain has high hardness and excellent whiteness (85% or above), and has comparable whiteness with light-weight porcelain. The low-temperature semiwhite porcelain has low water absorptivity (which can be kept at 3% or below and can reach the porcelain industry standard), has the advantages of high strength excellent high temperature resistance and excellent microwave resistance, can be subjected to 180-DEG C drying oven testing more than twice, and can pass the microwave oven and dishwasher performance test. The low-temperature semiwhite porcelain has wide applicability, and can be widely used for producing medium / high-grade domestic ceramics.

Description

technical field [0001] The invention belongs to the technical field of ceramics, and in particular relates to a low-temperature semi-white porcelain and a manufacturing method thereof. Background technique [0002] At present, low-temperature fast-fired ceramics are still limited to the research of light-weight white cloud pottery and reinforced pottery. Although the firing of light-weight white cloud pottery and reinforced pottery can achieve the purpose of energy saving and environmental protection, with the increasing demand for ceramic And people's requirements for the added value of daily-use porcelain are getting higher and higher, and light white cloud pottery and reinforced pottery can no longer meet the current market demand. [0003] As we all know, during the firing process, ceramic materials need to go through the stage of thermal expansion and cold contraction, and will experience volume shrinkage and linear expansion. At present, the existing half-white porcela...

AI Technical Summary

Problems solved by technology

[0002] At present, low-temperature fast-fired ceramics are still limited to the research of light-weight white cloud pottery and reinforced pottery. Although the firing of light-weight white cloud pottery and reinforced pottery can achieve the purpose of energy saving and environmental protection, with the increasing demand for And people's requirements for the added value of daily-use porcelain are getting higher and higher, and light white cloud pottery and reinforced pottery can no longer meet the current market demand.

[0003] As we all know, during the firing process, ceramic materials need to go through the stages of thermal expansion and cold contraction, and will experience volume shrinkage and linear expansion. At present, the existing half-white porcelain has the following shortcomings: First, the traditional half-white porcelain has the following disadvantages when firing The linear shrinkage rate is often as high as 15% or more; second, the firing temperature of traditional semi-white porcelain is relatively high, generally above 1250°C; third, the firing time of traditional semi-white porcelain is long, and it takes a long time from firing to cooling. More than 11 hours; fourth: the whiteness of traditional semi-white porcelain is low, which affects the aesthetics; fifth, traditional semi-white porcelain has high water absorption and poor high temperature resistance; therefore, a kind of reasonable ingredients can be fired at low temperature It is particularly important to make low-temperature semi-white porcelain with excellent performance and widely applicable to medium and high-grade daily-use ceramics.