Preparation And Properties Of Ni²⁺Ions Doped Glass Ceramics

The development of optical communications has been greatly improved by the application of Near Infrared fiber amplifier.And with the arrival of internet plus era,the transmission of data is bound to develop rapidly.However,the gain spectrum provided by the Er3+-doped fiber amplifier can no longer meet the actual needs.Therefore,the development of super-broadband fiber amplifer is essential for the development of optical communications,and the research of activation ions doped materials is very important from the material science point of view.The near infrared luminescence can be observed by Ni2+ ions doped glass ceramics,but it still can not meet the actual needs because of still narrow luminescence bandwidth and higher requirement of preparation conditions.In this paper,two aspects have been studied about how to broaden the luminescence bandwidth of Ni2+ ion and optimize the preparation parameters,effectively.The effects of heat treatment systems,doping Ni2+ ion concentrations on infrared luminescent properties were analyzed.And the luminescence bandwidth of Ni2+ ion doped glass ceramics was effectively broadened by control microstructure and different activation ions co-doped.Finally,the melting temperature of glass ceramics was reduced by sol-gel method,and at the same time,a new preparation method was used to reduce the melting temperature in this paper.The details are as follows:The luminescence properties of Ni2+ doped ZnGa2O4 glass ceramics could be impacted by heat treatment temperature and doping Ni2+ ion concentrations.As the temperature increasing,the intensity of luminescence increases gradually and the peak position shifts to lower wavelength.At the same heat treatment temperature,the luminescence intensity firstly increases with the NiO concentration and then decreases.MgO was introduced to alter the glass netwoork in ZnGa2O4 glass ceramics system,and glass ceramics containing solid solution MgxZn1-xGa2O4 could be obtained.The full width at half maximum(FWHM)could be increased from 330nm in ZnGa2O4 glass ceramics to 400nm in MgxZn1-xGa2O4 glass ceramics covering the optical communication bands.But the MgxZn1-xGa2O4 glass ceramics is difficult to prepare transparent glass ceramics.Ni-Erco-doped ZnGa2O4 glass ceramic not only could exhibit excellent luminescence properties(the FWHM about 400 nm),but also transparent glass ceramics could be prepared simply.This is mainly due to the fact that the energy transfer of Ni2+ and Er3+ ions is cut off effectively in ZnGa2O4 glass-ceramics.Ni2+ ions doped ZnAl2O4 glass ceramic was prepared by sol-gel method and the preparation parameters was optimized.The infrared luminescence with FWHM of about 210 nm was observed from the glass ceramics.But the sol-gel method could not solve the cracking of glass ceramics.So a new preparation method,ZnAl2O4:Ni2+ doped tellurite glass ceramics were prepared by sol-gel and melt cooling method.The melting temperature was only 550-650?,which could reduce the melting temperature of high temperatue melt cooling method(about 1550 ?),significantly.The sample of 0.008N showed luminescence properties with FWHM of about 220nm.A new direction is provided for the near-infrared luminescence properties of Ni2+ ion doped glass ceramics.