用改进的布里奇曼法在两温区立式炉中生长出２０×５５ｍｍ硒镓银单晶体．晶体外观无裂纹，完整性好．将晶体沿（１０１）面解理，加工制成１０ｍｍ×１０ｍｍ×９ｍｍ测试样品，在红外显微镜下观察，晶体内部均匀，包裹体及其它缺陷较少．晶体红外透射率在１０．６μｍ附近达６２％．吸收系数为０．０５ｃｍ－１．并对晶体热蚀坑和腐蚀条纹进行了扫描电镜观察． An improved Bridgman method was used to grow single crystals of selenium gallium arsenide (20 × 55mm) in a vertical furnace with two temperature zones. Crystal appearance no cracks, integrity is good. The crystal was cleaved along the (101) plane, processed to make a 10mm × 10mm × 9mm test sample, observed under an infrared microscope, the crystal was uniform, with less inclusions and other defects. Crystal infrared transmittance of 62% near 10.6μm. The absorption coefficient is 0.05cm-1. The thermal corrosion pits and corrosion stripes were observed by scanning electron microscopy.