spodumene

Application in ceramic embryo body

Spodumene was added into the ceramic embryo as a flux and an important component to ensure the formation of low thermal expansion crystals.

Traditional porcelain often has poor thermal vibration resistance due to internal stress caused by volume changes produced by phase transformation of quartz and cristobalite. In the body after the addition of forging and burning into β -spospoxene raw materials, the lattice structure can absorb kaolinite phase transition free SiO2 and additional SiO2, into a solid solution, and through the structure of the feldspar is not allowed. It can make quartz continuously melt in the melt and inhibit the conversion of residual quartz to quartz with much higher thermal expansion coefficient than quartz. It can also reduce the crystal transition temperature of β -quartz to α -quartz, and make β -quartz with low thermal expansion coefficient stable in a wider temperature region. The addition of file pyroxene contributes to the formation of mullite at lower temperatures to increase body strength. As a result of these effects, the pasty stone ceramics have a wide range of special uses because of their low thermal expansion. With its good thermal malleability, it is widely used in kiln furniture, induction heating parts, high temperature fixtures, resistance wire coils, high voltage transmission insulators, household fire-resistant tableware, and thermocouple protective covers, etc. With its very low or zero thermal expansion coefficient, it can be applied to the blade of impeller, jet engine parts, nozzle linings, internal machine parts and high-precision electronic components requiring very specific size. Using its high temperature chemical stability, used for metal casting barrels, solid face chamber combustion boat and combustion tube, as well as acid conferring oranges, etc. [2] [4]

The porcelain billet made by mixing spodumene and potassium feldspar (or albite) has lower water absorption, lower firing temperature and higher strength than that made by feldspar alone. The experimental results show that when the billet contains 20% nepheline syenite and 10% spodumene, the firing sensitivity of the billet can be reduced to 1050℃. By adding pyroxene into the body and using common daily ceramic manufacturing technology, a new type of heat-resistant ceramic cookware can be produced, which has high strength and good thermal vibration resistance. 20℃~510℃/450℃ one time heat exchange does not crack, low cost, can be used for frying, frying, stewing, cooking food under a variety of heat coating excellent performance. Using the production technology and equipment of ordinary daily porcelain, the low expansion microcrystalline ceramic electromagnetic cooker panel with low expansion coefficient dominated by the solid crystal phase of riyiliene pyroxene can be produced. Product performance is fully in line with national standards, can be upgraded with foreign emblem products Bola and heat resistant Bola. Compared with glass ceramics, it has the characteristics of low firing temperature, simple process, low cost and easy popularization. In addition, the hui crystal meat porcelain has the advantages of low expansion coefficient, good thermal disturbance, good electrical insulation and good chemical stability, and has a wide application prospect in the manufacture of non-ferrous metal filters, thermal converters and so on. [2]

The ratio of alkali metal oxides to feldspar materials used in the manufacture of electrical ceramics is strictly required, because they have a very important effect on the dielectric properties of electrical ceramics. Dielectric properties, mechanical strength and thermal stability all represent the properties of electric porcelain. These performance indicators depend on the composition, properties and grade of the material being used. The most interesting material for porcelain production is lithium - spodumene concentrate. Using spodumene completely instead of feldspar to produce insulators can greatly improve the mechanical strength and insulation strength, reduce the coefficient of thermal expansion, improve the thermal stability, and reduce the firing temperature. [2] [4]

Application in ceramic casserole

On the basis of the traditional casserole technology, spodumene was added to the material in a certain proportion, and the stability and heat resistance of spodumene were used to make up the shortcoming of the traditional casserole. This kind of casserole is called the new generation of ceramic casserole. The casserole pot will not crack when heated to 600℃ and put into 20℃ water. Lithium omphacitic heat-resistant earthenware pot can be directly in the microwave oven barbecue, can also be used in the refrigerator, under various heat Fried, Fried, stew, cooked food, through long-term under the condition of thermal shock test is still in good condition, has a good thermal stability performance, at the same time spodumene is belong to the crystal type of weak alkaline minerals, rich in a variety of minerals can be decomposed by heating the weak alkaline minerals, Add spodumene ceramic casserole to cook food can supplement the body needed trace elements, has a certain health effect.