Research On The Preparing Technology & Properities Of Ceramics Used For Pumping Cavity

The efficiency and output quality of Solid-state is controlled by pumping cavity。The materials used for pumping cavity should have provide high diffuse reflectivity during the required wavelength。In view of the weak point of the current commonly used pumping cavity ,such as metal Cavity, glass and plastic cavity ,the main goal of this thesis is to develop ceramic pumping cavity。The diffuse reflectivity of various alumina ceramics which were used for pumping cavities laser was discussed。The influence of chemical composition and physical structure on the diffuse reflectivity and mechanical properties was also studied。The pumping cavity provides high diffuse reflectivity during the the laser crystal absorption band,in addition, mechanical properties can meet the requirement。The detail work is as following:(1) the structure and preparing technology of ceramic pumping cavity have been designed(2) By comparation,Hot press injection was choosed as the reasonable molding method。the influence of molding parameters and binder materials to the green bodies were studied。Besides,the reliability of debinding was discussed to optimize the process(3) Choose the ceramics based on alumina,a series of prescription of materials were designed, compared them on reflectivity and mircostructure to determine the final ceramic materials for basal body(4) By changing the proportion of adulterant,several samples were prepared。the influence of sintering temperature and the proportion of adulterant to reflectivity was studied。combined with SEM,XRD,the reason which influence the properities was analyzed to optimize the process for the preparation of the sample which provided the best reflectivity (5) The strength and density of sample have been tested。combined with the optical properity,the most reasonable prosess condition was choosed。By testing the roughness of the sample surface ,the conclusion was fromed that the light was diffuse reflectivity(6) The enamel layer was prepared。By analizing the structure of enamel, The influence of enamel to the reflectivity of basal body was studied。...