Optimization of Spray freeze drying of spinel(MgAl2o4) powder and its effect on Spark Plasma Sintering The term granules is used continuously in the ceramic industry to identify large agglomerates that are deliberately created by adding granular granules to improve ductility. Granular size distribution is very important in granules, because by changing these two conditions, it is possible to control the conditions of the granules and the components produced. Granulization by spraying drying method involves the use of modern granular methods. Is the creation. The use of spray drying method has many advantages associated with spray drying methods, such as the smoother production of granules, the lack of chemical properties of materials due to lower process temperatures, better flowability and fluidity, uniformity and granularity, porosity reduction It has a granular structure and uses organic solutions. Magnesium aluminate spinel is very high (87%) traarent ceramic with good mechanical properties. One of the important things that affects the amount of light passing through traarent ceramics is the porosity that causes the light to spread. To give an example to traarency, the density must be equal to the density of the theory. The closer the porosity to the near-wavelength is, the greater the drop in traarency; therefore, methods should be used to construct traarent ceramics that have the minimum porosity remaining with the proper porosity distribution. Recently, the use of sintering techniques for the production of traarent ceramics has become commonplace, among them the spark plug method, due to its ease, process speed and porosity proper distribution, is a widely used method for making traarent ceramics. In this research, optimization of the granulation process by free spray drying method and its effect on spark plug plasma spin-drying process have been investigated. Initially, spinel alumina powder was prepared and rheological properties were evaluated in different amounts of PVA binder, solid and disperse load, and it was observed that with increasing the solid and binder rates, the quality of the granules increased to a certain extent, and the rate Specifically, due to the instability of the slurry, the resulting granules are not required. Also, the machine parameters for achieving optimum granules were also examined and the best machine parameters and process conditions were selected; then, the granular powder obtained from the optimal parameters Spectrophotometric Sintering Process They were stacked and compared with cured raw powder. Comparison of the results of the flowability of crude powder and granular powder by freeze spray drying method clearly demonstrated that by performing granulation operations the fluidity of the powder increases significantly, as well as comparing the scanning electron microscopy images The field taken from magnesium aluminate spinel powder before and after the granulation operation clearly showed that by performing the granulation process, the agglomerates in the initial powder were completely eliminated and the powder appeared to be spherical and its surface finishes increased. . Also, by analyzing images of the scanning electron microscope, it was found that the granulation process increased the particle size of the powder from the nanoscale to the micron. Density analysis, microstructural observations and optical properties of the resulting samples clearly demonstrated the suitability of the granulation process by free spray drying method for achieving the desired fine-grained traarency and quality, due to increased fluidity, uniformity , Spheroid powder as well as the disappearance of agglomerates in the initial powder. The sample obtained from the granular powder resulted in a higher density and better homogeneity in the microstructure compared to the raw material, which resulted in an increase of more than 79% of the light passage in the infrared range.