Study On The Structure, Characteristic And Application Of Chambersite And Tungsten-based Nanomaterial

China is the only country possessing chambersite deposits in the world at present, so far only preliminary research has been made, for example, its chemical composition and crystal structure of minerals, while the research of material science is almost blank. Luminescent properties, neutron irradiation properties, gamma irradiation properties, anti-tumor, sterilization properties, electromagnetic properties and friction properties have been firstly studied in this article.Properties of natural and synthetic nano-chamberstie have been compared to provide the basis for the rational development and utilization of chambersite.Structures of natural and synthetic nano-chamberstie have simulated by XRD and EMS software which is similar to spinel structure. There are lots of tetrahedral and octahedral sites, where Mn2+occupy these two sites emitting green light (500nm-540nm) and red (670nm-730) excited by blue light (450nm-490nm). This luminescent property of chambersite have the "cool light" into the nature of "warm light" may be applied to the production of energy conversion of glass, with good insulation effect, may also be used to make lasers.After irradiated by gamma ray of202Gy, amounts of crystal defects appeared in chambersite, at the same time, the emission intensity of natural chambersite improved3.5times and the synthetic increased by three times. After the high energy neutron (14MeV) radiation, the emission intensity of natural chambersite increased by39%, and the synthetic increased by23%. This characteristic of chambersite that emission intensity changes with nuclear radiation makes chambersite have important applications in the field of gamma rays detecting and neutrons tracing material. At the same time, epoxy/chambersite coating prepared by physical method have effective absorption to neutron rays, the absorption rate of1.05cm thickness of the nano-chambersite composite coating for14MeV neutron is up to19%. So as neutron shielding material, chambersite has important application value. Chambersite might as nuclear war or a nuclear reactor radiation protection and nuclear tracer materials. Chambersite has relatively stable electromagnetic properties in the low-frequency electromagnetic waves and microwave band, by introducing appropriate absorbent can be applied in electromagnetic shielding field.Properties of anti-tumor and sterilization have been found by the biological experiments of A549human lung cancer cells and escherichia coli BL21. Natural chambersite has the tumor inhibition rate of80%and the bacterial kill rate97.6%. Therefore, by using spinning process mixed chambersite particles in the fibers tos to produce a protective clothing, which have absorption of cosmic rays and the bactericidal effect, can be used to protect astronauts or used in a nuclear war in the personal protection.Copper-based powder metallurgy friction material is key material in high-speed and heavy duty equipment brake, which occupies an important position in the aerospace and automotive industry. Material used in Experiment has the same components with the copper-based friction plate in automotive. By introduced chambersite in friction material, the friction coefficient of the friction plate is more stable and wear rate decreased, thereby increasing the friction and wear of copper-based friction plate performance. Therefore, chambersite is important for improving the life and safety of copper-based friction materials.Finally, the paper discusses the photocatalytic, anti-viral and anti-tumor properties of tungsten-based nanomaterials. The use of citric acid method, by controlling the pH of the reaction precursors, different structures of tungsten-based nanoparticles have been synthesized, and their microstructure model are established. Tungsten with different structures of Eu3+doped WO3and CaWO4nanomaterials have significant photocatalytic activity to water, Rhodamine B and methyl orange, while CaWO4:Eu3+nanomaterials have more excellent catalytic properties. Tumor and virus growth inhibitory effect of different samples have been tested in biological experiment, to determine the optimal structure of the component of antitumor antiviral drugs. Tungsten-based nanomaterials with different structures for different optimal inhibition rate of tumor viruses are different.Through the dynamic Changes of fluorescence and transient absorption spectra before and after the reaction between nanoparticles and tumor cells, the charge transfer between drugs and tumors can be characterized.