Preparation And Research On The Low-melting Glass Based On Application Of Composite Coating

In recent years,with the development of glass surface deep processing technology,glass surface decoration and protection has become a research hotspot.In this technology,the performance of the low-melting glass has a crucial impact for coating technology.The ZnO-B₂O₃-SiO₂?ZBS?glass have a low melting temperature and good thermal stability,can be used for deep processing of glass surface and other fields.However,the ZBS system low-melting glass research is scarce which used in glass coating coating technology.Therefore,the study of low melting point glass based on composite coating and its sintering properties have a great meanings to promote the application of the whole glass-based composite coating.In this paper,the ZBS low-melting glass was taken as research object,the network structure and properties of the ZBS low-melting glass had been studied and explored by using XRD,SEM,DSC,Raman,Hardness test and etc..The effect of different oxide content on the low-melting glass was studied.And the optimum heat treatment system was explored for the composite coating.At last,the toughening of ZrO₂ in glass-based composite coating was explored by the toughening principle.After the above study,the main results are as follows:?1?In the ternary system,SiO₂ and B₂O₃ is a network forming bodies,and the content of[BO₃]is obviously increased,and the glass structure is unstable.In the quaternary system,Al₂O₃ as a network of external fill in the network,so that the non-bridge oxygen in the glass body to reduce the glass network structure.B₂O₃ is still mainly in the form of three coordination boron oxide plane triangle[BO₃]form.?2?In the five-element system,Na₂O and CaO is as a network of external but Al₂O₃,filled with network gap.In this situation,the structure of glass becomes more closely.In a multicomponent system,the bridge oxygen is increased,the glass structure is more inseparable.The number of[ZnO₄]are increased with the increase of the amount of ZnO.When the content of ZnO is 32 wt%in the glass,its performance is the best,acid and alkali resistance is A grade,the hardness value is628.9 Hv.?3?The structure of the low-melting glass tends to become loose and becomes dense with the increase of the amount of K₂O.And the coefficient of thermal expansion is decreased first and then increased,and the Tg of the sample K5 is decreased to 489?.The effect of increasing the hardness of glass is MgO>BaO>CaO.After testing of comprehensive performance,the best performance of the two formulations are C3 and C4 formulations.?4?The low-melting glass of C3 and C4 was selected for composite coating preparation.All the properties and morphology test were used.The low-melting glass of C3 is more suitable for composite coating.In 560?,the composite coating surface of C3 has no crack,no pores,good surface gloss,and a gloss of 76.1 at 85°.Similarly,the microhardness value of the C3 composite coating reached 579Hv.Its acid and alkali levels are B,A level.?5?When the ZrO₂ were introduced,the hardness of the composite coating was improved obviously.The microhardness of the composite coating was increased by27.25%,and the gloss at 85°was 76.4 with introducing 2wt%ZrO₂.Zr⁴⁺would be eutectic with the low melting glass powder during the heat treatment,and a small amount of Zr⁴⁺enters the internal network structure of the glass.