采用蒸发法、反应离子溅射法和等离子增强淀积法３种方法，在ＳｉＯ＿２－Ｓｉ衬底上淀积一层ＳｎＯ＿２薄膜，在这层薄膜内用反应离子溅射或蒸发法掺人微量Ａｌ．比较这些......

The surfactant (expanding agent) plays a decisive part in compulsory crystallization for saturated solution of Ammonium ......