Abstract
A precipitation method was found to be the most available forming process of the photoconductive (PC) layer for the X-ray image converting panel made of electroluminescent and photoconductive materials, To make a homogeneous PC-layer of 300-400 μm thickness with high reproducibility, the characteristics of the PC powder materials, resin binders and solvents were investigated and optimum conditions for the precipitation were established.
The photo-sensitivity of the PC-layer increased by using a high speed stirring process, and a finer surface of the PC-layer was produced by controlling the difference of precipitation speeds between large and small PC-particles.
As a result, the quality and resolution of the converted image were improved and the possible applying voltage of the panel increased. The improved panel showed a brightness of 12-15 ft-L, contrast of 1.5-1.8, X-ray sensitivity of 0.03-0.05 R/min and resolution of 0.25-0.3 mm by penetrameter, and suggested wider applications in the filed of X-ray non-destructive inspection.
