The spin - coated films are single - phase and highly oriented with the c - axis perpendicular to the quartz substrates . this type of materials has good thermal stability , and their decomposition points are near 300 c 旋涂法沉积的该类材料的薄膜具有较好的单相结构,材料成膜后,其单相晶体的c轴很好地垂直于石英基片表面。