Nanografi Nanotechnology

Properties and uses Calcium carbonate is a standout amongst the most prevalent chemicals. Despite the fact that they are accessible in different structures they are chemically similar and just vary physically. They are also called calcite. Calcium carbonate  is a chemical compound with the equation CaCO3. Calcium carbonate is a white insoluble powder-like substance which is found in minerals, chalk, marble, limestone, calcite, shells, pearl, and so forth. Medicinally, it is utilized as a stomach settling agent or as a  calcium  supplement, pharmaceutical filler in tablets, and hemodialysis treatment. It is additionally utilized as fillers in cosmetics. It is added to swimming pools as a disinfectant agent and as pH corrector. Calcium carbonate finds broad utilization in the manufacturing industry as a building material On the huge scale, it is obtained by passing carbon dioxide gas through calcium hydroxide. In any case, if carbon dioxide is passed in...

  Nanocalcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3).  Nanocalcite  crystals are trigonal-rhombohedral. Nanocalcite is transparent to opaque and may occasionally show phosphorescence or fluorescence. The nature, shape and dispersion characteristics of the nanocalcite particles effect the mechanical and other properties of the polymers. The calcium, carbon and oxygen atoms can arrange themselves in three different ways, to form three different calcium carbonate minerals. The most common arrangement is the hexagonal form known as  calcite . A number of different nanocalcite crystal forms are possible: scalenohedral, rhombohedral and prismatic. The advantages of using nanocalcite are that, they can improve the air-tightness, opacity, resistivity and stiffness, and provide good stability, and good electricity insulation. Therefore, use of nanocalcite is important in composite materials. Nanocalcite has been used...