spodumene

Application in ceramic embryo body

Adding spodumene to the ceramic embryo is not only a fluxant, but also 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 change produced by phase transition of quartz and quartzite. When the raw material converted into β-spodumene after forging and firing is added into the blank body, its lattice structure can absorb the free SiO2 and additional SiO2 from kaolinite phase transition to form a solid solution, but the structure of transkainite is not allowed. It can make the quartz continuously melt in the melt, inhibit the residual quartz to the thermal expansion coefficient of quartz is much higher than the transformation of quartzite. It can also reduce the crystal transition temperature of β-quartz to α-quartz, and make the β-quartz with low thermal expansion coefficient stable in a wider temperature region. In addition, raspite helps to form mullite at lower temperature to increase the strength of the billet body. As a result of these effects, stucco ceramics have low thermal expansion and have a wide range of special applications. With its good thermal ductility, it is widely used in kiln furniture, induction heating components, high-temperature fixtures, resistance wire coils, high-voltage transmission insulators, household fire-resistant tableware, and thermocouple protective covers. Using its very low or zero coefficient of thermal expansion, it is applied to the blade of impeller, jet engine parts, nozzle linings, internal shan engine parts and high precision electronic components requiring very definite size. Using its high temperature chemical stability, it is used in metal casting barrel, combustion boat and combustion tube for solid face chamber, and acid-feeding orange, etc.

The water absorption of the blank made of spodumene and potassium feldspar (or albite) is lower than that of the blank made of feldspar only, the firing temperature can be reduced and the strength can be increased. The results show that when the billet contains 20% nepheline syenite and 10% spodumene, the firing uptake of the billet can be reduced to 1050℃. By adding strange pyroxene into the blank body and using ordinary daily ceramic manufacturing process, a new type of heat-resistant ceramic cooking utensils with similar quality can be produced, which has good strength and thermal vibration resistance. 20℃~510℃/450℃ primary heat exchange does not crack, low cost, can be used for all kinds of heat under the frying, frying, stew, cooking food and other excellent performance. The low expansion microcrystalline ceramic kitchen panel with low expansion coefficient of pyroxene solid melt with absolute advantage of crystal phase can be produced by using the production process and equipment of ordinary daily porcelain containing strange minerals. The product performance is fully in line with the national standards, it can be challenged with foreign badge glass and heat-resistant glass. Compared with glass-ceramics, it has the characteristics of low sintering temperature, simple process, low cost and easy popularization. In addition, using the characteristics of low expansion coefficient, good thermal disturbance and vibration, good electrical insulation and chemical stability, the Hui crystal porcelain has a wide application prospect in the manufacture of non-ferrous metal filters, thermal converters and other aspects. [2]

The ratio of alkali metal oxides in feldspar raw materials for the manufacture of electrician ceramics is strictly required because they have a very important effect on the dielectric properties of electrician 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 raw material used. The most interesting material in the production of electric porcelain is spodumene concentrate which contains lithium. Using spodumene to completely replace 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.

On the basis of the traditional casserole process, spodumene is added in a certain proportion in the material to make use of the stable and heat-resistant properties of spodumene to make up for the shortcomings of the traditional casserole that it is easy to crack by dry burning. This kind of casserole is called a new generation of ceramic casserole. The casserole is heated to 600℃ and put into 20℃ water without cracking. 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, Adding spodumene to the ceramic casserole to cook food can supplement the body needed trace elements, has a certain health effect