| Quartz glass plays an irreplaceable role in optical applications,while the traditional optical component processing process is very cumbersome,and the development of the structure and function of manufacturing components is greatly limited.Additive manufacturing,because of its high degree of automation and high degree of design freedom.The combination of additive manufacturing and glass materials is of great significance to the manufacture and development of glass components.In order to solve the problem of poor surface quality and low transmittance of 3D printed glass elements,the UV curing 3D printing process of quartz glass elements has been studied in detail in this paper.The main research content of this paper includes the following aspects:First,the preparation process of photosensitive glass slurry is studied in detail in this paper.Through the principle of UV curing of ceramic slurry,the silica powder and resin liquid components in the glass slurry are selected and proportioned.Then the glass slurry is optimized by printing effect.The optimized glass slurry was further subjected to rheological testing and stability testing.Through the research,successfully prepared a photosensitive glass paste with a viscosity of 850.4 m Pa·s and a volume solid phase content of 40%.Secondly,this paper studied the UV curing printing process of photosensitive glass slurry.The influence of curing time,polymer inhibitor content and photoinitiator content on cured depth was explored by orthogonal experiments.Then the adjustment of photoresorbent and curing time on the lateral printing accuracy of printed parts was studied through printing experiments.The influence of layer thickness,print layer number,exposure surface area and other parameters on the bending deformation of printed parts was analyzed through simulation calculation.As a result,over-curing and deformation of the printed part is suppressed during the printing process.Again,this paper studied the heat treatment process for printed parts.In the degreasing process,through the TG/DSC analysis of the print,the suitable degreasing temperature and insulation point are found,and the corresponding degreasing heating curve is formulated..In the sintering process,the effect of different temperatures on the crystal phase of silica was studied by SEM and XRD analysis.The influence of sintering factors on the optical transmittance of sintered parts was analyzed by orthogonal experiments.and the corresponding sintering curve is obtained according to the experimental results.Finally,the causes and solutions of cracking of the printed parts were analyzed,and the dense and transparent quartz glass pieces were obtained.Finally,this paper tested the feature parameters of the workpiece.The crystalline phase of the glass part was analyzed by XRD.The density and shrinkage of the part were calculated.The bending strength of the part was tested by the three-point bending experiment.The hardness of the part was tested by the nanoindenter.And the transmittance of the part was tested by spectrophotometer.The test results show that the density of 3D printed quartz glass elements reaches 99.8%,the flexural strength reaches 78.67 MPa,the hardness reaches 9.147 GPa,the modulus reaches 73.27,and the optical transmittance reaches 87%. |
