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Optical Spinel Ceramics Processing

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The growing capacity to purify, expand and distinguish ceramic materials has led to application of ceramics processing into the field of science. In general, heat is applied on the material for the production of the ceramic as well as on other raw materials in order to develop a unbending product. For ceramic products that make use of naturally occurring materials like rocks and minerals, there is a need for special processing of the materials. This helps in controlling the transparency, size of particle, distribution of the particle sizes, and heterogeneity of the materials. All these factors have a significant effect on the final product being developed, which is the finished ceramic. In case of some ceramic materials, the starting materials used for processing include powders that are prepared chemically. With the help of accurate chemical compositions and sizes of particles the synthetic materials may be used to control the production of these powders (Ceramic Processing).Once this step is achieved, the ceramic materials are transformed into particular shapes. Water and additives are added to the material for this purpose after which a shape forming process is applied on the materials. The forming techniques that are most commonly used for the purpose include extrusion, slip casting, pressing, tape casting and injection molding. Once the formation of the ceramics is complete, a green color of the ceramics would be obtained. Heat is then applied on this formed material which is a treatment referred as firing or sintering that leads to the production of a finished product rigid in nature. In some cases a glazing process is also applied, particularly where the products include electrical insulators, dinnerware and tiles. Ceramics processed for highly developed applications may undertake a machining and/or a step for polishing the materials such that they can meet specific criteria for engineering design (Ceramic Processing).Thus the basic steps involved in the processing of ceramic products include procurement of raw materials, beneficiation, mixing, forming, green machining, drying, presenter thermal processing, glazing, firing, final processing and packaging. Beneficiation refers to the process that includes comminution, purification, sizing, classification, calcining, liquid dispersion, and granulation of the raw materials before proceeding for the further steps. With the help
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