refractory surface
1.The Company product characteristics : good withstand high temperatures, low temperature performance, longterm use in 80~+250 again : chief climate ageing nature of refractory Otherwise, the highoxygen index, nonabsorbent, chief radiation excellent, if longterm exposure in the atmosphere, surface and the performance of its fundamental unchanged; Kai Jun good performance, high voltage resistance; Excellent resistance to corrosive, Almost any solvents may show in strong acid aqua regia, light oxidation sodium strong base, strong agent five fluorinated uranium are not corrupted; good resistance to abrasion , static friction coefficient is the smallest plastic, since lubricant fine performance, the surface is not quite apparent; tensile strength good.
2.In this preparation nanocomposites technology is adopted, compositive refractory material is used as the main raw material and nanometer materials are used as betterment additives. By adopting plastic admixture, homogenization of the body batch,extrusion molding, micro-wave drying,sintering to net size and so on,the products attain good using effects. Its surface porosity is 60～80%,compression strength>25MPa, thermal expansion coefficient<6×10-6/℃,using temperature 1400～1850℃.
3.P wave duration in lead, Ⅱ of surface electrocardiography in-creased from 48. 75 ± 8. 82 ms to 61. 00 ±5. 07 ms (P<0. 01 ), effective refractory period of high right atrium(HRA-ERP) decreased from 133.33±14. 97 ms to 102.67± 11. 00 ms (P<0.01).
4.According to chemical composition and crystal structure of minerals, the optical, mechanical, thermological, electrical, magnetic and surface properties of minerals, the function of physical chemistry of minerals, the methods of mineral analyses and research, the position and the action of minerals in the refractory, keeping temperate, insulant, ceramic, constructional, filling, agricultural, environmental protective and grinding materials, the request of the materials to mineral function will be introduced, and the applied present condition and the developing tendency of diamond, graphite, groundum, quartz, wontmorillonite, talc, mica, vermiculite, feldspar, zeolite, calcite, flourite, and other minerals will be dealt with particularly in the course.
