A Fund Dioxide Is A Ceramic Imitation Gold Materials Development And Related Mechanism

Imitated gold used for decorative purpose instead of rare and costly gold possesses of large market demand and widest application foreground. TiO-based cermet imitated gold with excellent integrative properties, developed in this research, avoided discoloration, low hardness of Cu-based imitated gold and difficulty in production, costliness of high quality cermet imitated gold based on TiN.The technology of TiOx synthesis by reaction between solid Ti and TiOi was studied in detail with the aid of XRD and EDS. Penetrating theory analyses on mechanisms of the reaction kinetics and influence of every factor on the reaction speed were made. The synthesis reaction between solid phases was greatly improved and golden TiO with very well-proportioned O distribution was obtained in lower temperature for the first time by using "mechanical activation-lower temperature synthesis" technology, Titk used as reducer instead of Ti. Not only the volatilization of Ti was avoided, the fixedness of Ti/O get guarantee but also the cost was reduced.The relative stabilities of intermediate compounds and titanium monoxide were examined deeply with quantum chemistry, crystal field and chemical bond theory. Outer layer electron structure, ionization potentials and track division of Ti and AG?of the dismutation reactions of TiO and Ti2O3 proved that titanium monoxide was stable.The range of oxygen index of nonstoichiometric titanium monoxide was determined accurately, TiO o.828?.002-TiO 1.185.?.004, by means of XRD assisted of EDS. A device for solid surface color measuring was designed. It was the first time that the color characteristics of TiOx with different "x" value and its changing law along with the oxygen index were studied in detail with spectrophoto-method. The range of the oxygen index, with which TiOx had the closest color with 24KAu was determined, ranged from 1.14 to 1.16, by determinations of wavelength-reflection rate curves of TiOx and 24KAu, chromatisms between TiOx and 24KAu. The chromatisms of TiOx when x was within this range was about 60% of the ones of Cu-based imitated gold or TiN. Theoretical examination with quantum chemistry views indicated that the energy needed by taking charge transition of titanium monoxide was more than that of the photons of visible light, there was no n-n* or - * transition in titanium monoxide. The golden color of titanium monoxide was created because of the d-d transitions of outer layer electrons of Ti2+. Its color turned to golden with slightly red along with increasing of the energy difference among 3d tracks of Ti2+ because of strengthening of O2- field caused by TiOx's oxygen index increase.Anti-discoloration and anti-corrosion experiment results of titanium monoxide in air, family atmosphere, mud, artificial sweat, etch used for KAu, NaCl solution, thick ammonia indicated that it was far superior to Cu-based imitated gold and TiN-based cermet imitated gold in anti-discolorationand anti-corrosion properties. It was etched very slowly in thin HC1 and H2.SO4 solution and its color did not change. Studies of the color and anti-discoloration etc. of titanium monoxide confirmed the possibility to be used as high-grade imitated gold, and offered experiment and theoretical basis for developing new application fields of titanium monoxide.The wettabilities of Fe, Co, Ni, Cu, Al, Si, Mn, FeCr and Fe-C on TiOi.o and TiOi.w were studied in detail for the first time using high-temperature sessile drop method. Their wetting interfaces and wetting mechanisms were deeply examined with aid of XRD and EDS. Source materials and theoretical basis were offered for development of the binding alloy of titanium monoxide and wettibility study of metal/ceramic. The affinity and action between Ti(not only O) in TiOx and Fe, Co, Ni, Al or Mn remarkably influenced their wettabilities on TiOx and the interface binding strength. The chemical affinity between Al and TiOx was strong and the interface reactions existed, but wettability of Al on TiOx was very poor. Dissolution between phases existed...