优先取向 meaning in Chinese

preferred orientation

And , the sbn films were found more and more ( 001 ) preferential orientated with the increasement of film thickness and it was attributed to the lower layer acting as the buffer one to improve the lattice mismatch between the sbn film and the substrate
而且，随着膜厚的增加，处于底层的膜层起到缓冲层的作用，逐渐改善着薄膜与衬底之间的晶格失配，从而使得sbn薄膜在( 001 )方向的优先取向性越来越好。