CAJ | 학술논문

采用恒电流电化学技术直接在金属铝片上制备了具有白钨矿结构的钼酸盐(BaMoO4)薄膜;通过EDX测试研究了该薄膜的成核和生长.研究结果表明,在薄膜生长的初期,一定数量的MoO4负离子配位多面体沉积在基片上并形成具有白钨矿结构的蜂窝状骨架,继而Ba2+对该蜂窝状骨架进行填充,由此形成晶核和晶粒;随着沉积时间的延长,蜂窝状结构不断长大,Ba2+离子也不断填充;当晶粒生长过程结束时,晶粒变饱满并且晶粒表面变光滑;当薄膜生长一定阶段时,晶粒及薄膜的组成符合其化学计量比.
채용항전류전화학기술직접재금속려편상제비료구유백오광결구적목산염(BaMoO4)박막;통과EDX측시연구료해박막적성핵화생장.연구결과표명,재박막생장적초기,일정수량적MoO4부리자배위다면체침적재기편상병형성구유백오광결구적봉와상골가,계이Ba2+대해봉와상골가진행전충,유차형성정핵화정립;수착침적시간적연장,봉와상결구불단장대,Ba2+리자야불단전충;당정립생장과정결속시,정립변포만병차정립표면변광활;당박막생장일정계단시,정립급박막적조성부합기화학계량비.
Barium molybdate(BaMoO4)films with scheelite-structure were prepared directly on metal molybdenum substrates by constant current electrochemical technique.The nucleation and growth of the films were investigated through EDX measurement.It is found that at the early stage of film growth,a quantity of MoO4 anion coordination polyhedrons deposit on the substrate resulting in the beehive framework,and then the Ba2+ ions fill in the beehive form,resulting in the crystalline nucleus and granules;along with the extension of deposition time,the beehive forms grow up and the Ba2+ ions fill in continually;and the crystalline granules become full and the surfaces of the crystalline granules become smooth when the growth process of the crystalline granules finish.