Study On The Mn²⁺-doped ZnO-B₂O₃-SiO₂ Optical Storage Glass

Mn²⁺-doped ZnO-B₂O₃-SiO₂ (ZBSM) glass is a new kind of optical storage material, and it can be used in many fields, such as image memory or information processing. In the experiment, samples of ZBSM glass were prepared by high temperature melting method; phosphorescence and storage properties of ZBSM glass were described, and experiment analogue of optical storage was successfully carried out; some effective factors on the traps distribution of ZBSM glasses were studied, including active ion, auxiliary active ion and the matrix composition; moreover, effects of composition variations on ZBSM glass structure were discussed, and the characteristic structure mould of ZBSM glass was deduced.Samples of ZBSM glass were preproducted by high temperature melting method which includes preparing of matrix glass and doping of active ion Mn²⁺. At last, composition and melting conditions of ZBSM glass with PSLLP property were determined.The properties of the phosphorescence and storage were described by fluorescence spectrum, afterglow spectrum, TL spectrum and EPR spectrum. The results show that: PSLLP (the signal light) is originated from the characteristic transmission 4T1(4G)→6A1g(6S) of Mn²⁺; at least there are two kinds of traps in ZBSM glass, and the energy captured may be stable by the deeper traps whose centeral depth is about 1.02eV. Through experiment analogue of optical storage, image storage and logical operation of ZBSM glass were carried out successfully.The influence of active ion, auxiliary active ion, matrix composition to optical storage property and distribution of traps were analysised by TL spectrum. Results indicate that: energy stored is supplied by Mn²⁺ which could also lead to concentration quenching; Yb³⁺ with proper quantites can suppress the concentration quenching of Mn²⁺. Otherwise, auxiliaried by the TL research of ZnO-B₂O₃:Mn²⁺ (ZBM), ZnO-SiO₂:Mn²⁺ (ZPM) and ZnO-P₂O₅:Mn²⁺ (ZSM), the effects of matrix composition were analyzed and the results show that: the matrix composition is a great effective factor on traps distribution. On one hand, when concentration of ZnO is greater than 60mol%, deeper traps of definite magnitude whose centeral depth is about 1.02eV are exited in glass systems above. On the other hand, the depth and density of traps have great changes with SiO₂, B₂O₃, P₂O₅, and the Si-O network is the most suitable for the optical storage.The changes of structure groups along with matrix composition of ZBSM glass were studied by the IR absorption spectrum. Based on the IR research, the characteristic structural model of ZBSM glass was described and the variations of traps were explanated furtherly.