CN1061956C

CN1061956C - Zirconium magnesium tempering porcelain

Info

Publication number: CN1061956C
Application number: CN97108287A
Authority: CN
Inventors: 黄睦松; 胡勇波
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-11-04
Filing date: 1997-11-04
Publication date: 2001-02-14
Anticipated expiration: 2017-11-04
Also published as: CN1179405A

Abstract

The present invention relates to a Zr-Mg tempering porcelain which belongs to the technical field of porcelain. A porcelain body of the porcelain comprises the following chemical compositions, in the weight percentages, 45 to 55% of SiO2, 4 to 20% of Al2O3, 20 to 40% of MgO, 2 to 15% of ZrO2, 1 to 30% of K2O and 0.5 to 2% of BaO or 0.5 to 2% of ZnO. A raw material formulation for making the porcelain comprises the following raw materials, in the weight percentages, 20 to 60% of talc, 20 to 50% of pycnotrope, 5 to 20% of potash feldspar, 1 to 4% of BaCO3, or 0.5 to 2% of ZnO, 2 to 15% of zirconium dioxide, or 3 to 17% of zircon sand and 10 to 25% of additive. The firing temperature of the porcelain is from 1200 DEG C to 1260 DEG C. The porcelain has the advantages of high impact strength reaching 5-8 kgfcm/cm<2>, good thermal stability, whiteness reaching more than 80 DEG, low firing temperature during product production and good energy saving effect.

Description

Zirconium magnesium tempering porcelain

The invention belongs to the ceramic technology field, relate to a kind of Zirconium magnesium tempering porcelain.

Present household china develops to the high strength direction, and its major cause is that it is particularly also more and more higher to the requirement of resistance to impact shock to the physical strength of household china because external hotel, restaurant uses high efficiency dishwashing detergent machinery.Present high strength china mainly is that the sal that contains higher aluminum oxide is strengthened porcelain, introduced a kind of " colour-in-glaze strengthening ceramics " as Chinese patent CN1014049B, this porcelain is exactly a kind of sialic reinforcement porcelain, main crystalline phase in the porcelain is mullite, corundum, quartz crystal, and its resistance to impact shock mean value is 2.9-3.65kg/cm ²This intensity still can not satisfy the requirement of mechanize washing, in order to reach requirement, mainly is to realize by the thickening porcelain body, so just make porcelain seem heavy, and improved production cost, in addition, the firing temperature of this porcelain than higher be 1350-1420 ℃, and the control of producing is required relatively stricter, make it to reach needed crystal phase structure, otherwise reduce yield rate with regard to being difficult to reach the intensity of expection

The objective of the invention is to provide a kind of and can further improve porcelain intensity, reduce the Zirconium magnesium tempering porcelain of firing temperature, save energy, reduction products production cost.

The objective of the invention is to realize with the following methods.The Chemical Composition of this its porcelain body of Zirconium magnesium tempering porcelain comprises SiO ₂45-55%, Al ₂O ₃4-20%, MgO 20-40%, ZrO ₂-15%, K ₂O 1-3%, BaO or ZnO 0.5-2% (by weight percentage) make the used composition of raw materials scope of this porcelain and comprise: talcum 20-60%, snake soil 20-50%, potassium felspar sand 5-20%, BaCO ₃1-4% (or ZnO 0.5-2%), zirconium white 2-15% (or zircon sand 3-17%), additive 10-25% (by weight percentage), additive comprise methylcellulose gum, the 0.5-2.5% of wilkinite, the 3-7% of high white kaolin that 60-80% is arranged, 5-10% marine alga, add Sudan Gum-arabic (or the roasting glue of rubber Bowl or maltose) 2-4% (by weight percentage).

Its firing temperature of porcelain base by above prescription made is 1200-1260 ℃, and total crystalline phase amount is 75-85% in the porcelain body of the porcelain of generation, and all the other are glassy phase (by weight percentage), comprise oblique protobastite MgO.SiO in the crystalline phase ₂Account for 50-65%, mullite 2-10%, trichroite 2-5%, zirconium white 2-15% (by the weight percent that accounts for porcelain body).Used raw material talcum has ripe talcum and gives birth to talcum, and the weight percent that its consumption accounts for the raw material total amount is ripe talcum (after 1300 ℃ of calcinings) 20-50%, gives birth to talcum 0-20%.

The chemical ingredients scope (by weight percentage) of the enamel that matches with above-mentioned porcelain body among the present invention is: SiO ₂55-65%, Al ₂O ₃7-10%, K ₂O 4.5-6.5%, Na ₂O 1-3%, CaO4-12%, MgO 2-6%, ZrO ₂2-10%, the former section prescription of enamel consists of: potassium felspar sand 30-50%, rhombspar 8-18% (or calcite 8-12%), quartz sand 10-20%, talcum 4-8%, zircon sand 4-12%, additive 6-10% (by weight percentage), include in the additive 60-80% high white kaolin, 5-10% wilkinite, 3-7% methylcellulose gum, 0.5-2.5% marine alga, add Sudan Gum-arabic (or the roasting glue of rubber Bowl or maltose) 2-4% (by weight percentage).

The present invention utilizes talcum to generate protobastite in heat-processed, and snake soil also generates protobastite and peridotites, has high strength, it is toughness reinforcing to utilize crystal of zirconium oxide to strengthen simultaneously, eliminate protobastite and peridotites because aging (crystal instability) phenomenon that thermal expansion causes, it is stable to reach each crystalline phase stress equilibrium, and a spot of trichroite reduces thermal expansivity, relax the thermal dilation difference between each crystal, add that crystal of zirconium oxide and partial oxidation zirconium melting are in magnesia glassy phase, the high temperature viscosity of glass is significantly improved, enlarged the sintering range of porcelain, the control of favourable firing temperature adds BaCO ₃Also can relax glassy phase rises and the remarkable speed that increases with temperature.Zirconium white also helps and keeps the good transparency of porcelain body, form beautiful sense, easily on the one hand, mullite needle-like crystal limited in the porcelain body is evenly distributed in the porcelain body, and be penetrated into the thickness of overglaze ten/one or two, make the tire glaze in conjunction with good, thoroughly solved tire glaze bonded difficulty in the steatite ceramic, improved the turbid property of overglaze gala, zirconium white has also improved hardness of glaze surface greatly, makes to become lead-calcium-potassic glass by calcium-potassium felspar sand host glass, improve the glaze surface elastic greatly, made physical strength, heat resistanceheat resistant performance improve.

Product of the present invention is after tested: resistance to impact shock reaches 5-8kgfcm/cm ², thermostability 200-20 ℃ (water) is qualified, and hardness of glaze surface surpasses 650Kg/mm ², more than whiteness 80 degree.The present invention knocks the sound of its sound such as steel plate by thousand intensity height, and introduces a large amount of magnesian raw material talcum and snake soil and higher zirconium whites of containing, and therefore is referred to as plumbous magnesium tempering porcelain.

The present invention has following holding a little;

Intensity height, Heat stability is good, hardness of glaze surface height, whiteness are good.The firing range broad of porcelain (40-60 ℃) firing temperature low (1200-1260 ℃), good energy-conserving effect, than low 180-200 ℃ of the firing temperature of high aluminium strengthening ceramic, can energy efficient 25%, can utilize abundant snake soil resource in a large number.Therefore the present invention also has good electric property, and good insulating except that can be used as high-intensity household china, also can be done high strength electroceramice, is used for electric oven, microwave oven and as pedestal, switching motherboard, the insulator of various resistance.

Be the embodiment that do not limit of the present invention below:

Embodiment 1: the Zirconium magnesium tempering porcelain tableware

Take by weighing raw material: blank: ripe talcum 35%, living talcum 10%, snake mosquito soil 20%, potassium felspar sand 15%, zirconium white 5%, barium carbonate 2%, interpolation chaste tree 13%.

Glaze: potassium felspar sand 40%, rhombspar 16%, quartz 18%, talcum 7%, zircon sand 10%, additive 9%

With full mistake 300 mesh sieves of above raw material ball milling, it is identical with the household china production process that it makes the moulding sintering process, 1200 ℃ of sintering temperatures.The porcelain product of gained, resistance to impact shock 5.5kgfcm/cm ², thermostability 200 ℃-20 ℃ (water) is passed through, whiteness 82 degree, hardness of glaze surface 660kg/mm ²

Embodiment 2: microwave oven porcelain tool

Take by weighing raw material: blank: ripe talcum 28%, snake mosquito soil 40%, potassium felspar sand 15%, zirconium white 5%, barium carbonate 2%, additive 10%

All the other are identical with embodiment 1.The porcelain product of gained, resistance to impact shock 7.5kgfcm/cm ², thermostability 200 ℃-20 ℃ (water) passes through, whiteness 85 degree, hardness of glaze surface 670kg/mm ²

Claims

1, a kind of Zirconium magnesium tempering porcelain, it is held the chemical ingredients of levying the porcelain body that is this porcelain and comprises: SiO245-55%, Al ₂O ₃4-20%, MgO 20-40%, ZrO ₂2-15%, K ₂O 1-3%, BaO or ZnO0.5-2% (by weight percentage) make the used composition of raw materials scope of this porcelain and comprise: talcum 20-60%, snake soil 20-50%, potassium felspar sand 5-20%, BaCO ₃1-4% or ZnO 0.5-2%, zirconium white 2-15% or zircon sand 3-17%, additive 10-25% (by weight percentage), additive comprise methylcellulose gum, the 0.5-2.5% of wilkinite, the 3-7% of high white kaolin that 60-80% is arranged, 5-10% marine alga, add Ah grain's uncle's natural gum or roasting glue of rubber Bowl or maltose 2-4% (by weight percentage), total crystalline phase amount is 75-85% in the porcelain body, all the other are glassy phase (by weight percentage), comprise oblique protobastite MgO.SiO in the crystalline phase ₂Account for 50-65, %, mullite 2-10%, trichroite 2-5%, zirconium white 2-15% (by the weight percent that accounts for porcelain body).

2, Zirconium magnesium tempering porcelain according to claim 1, it is held and levies the chemical ingredients scope (by weight percentage) that is the enamel that matches with porcelain body and be: SiO ₂55-65%, AI ₂O ₃7-10%, K ₂O 4.5-6.5%, Na ₂O 1-3%, CaO 4-12%, MgO 2-6%, ZrO ₂2-10%, the composition of raw materials of enamel consists of: potassium felspar sand 30-50%, rhombspar 8-18% or calcite 8-12%, quartz sand 10-20%, talcum 4-8%, zircon sand 4-12%, additive 6-10% (by weight percentage), include in the additive 60-80% high white kaolin, 5-10% wilkinite, 3-7% methylcellulose gum, 0.5-2.5% marine alga, add Sudan Gum-arabic or roasting glue of rubber Bowl or maltose 2-4% (by weight percentage).

3, Zirconium magnesium tempering porcelain according to claim 1, it is held to levy and is that used raw material talcum has ripe talcum and gives birth to talcum, and the weight percent that its consumption accounts for the raw material total amount is the ripe talcum 20-50% after 1300 ℃ of calcinings, gives birth to talcum 0-20%.