求翻译：根据BaFe12O19的化学计量比称取Ba(NO3)2和Fe(NO3)3•9H2O溶解于适量的去离子水。按柠檬酸与金属离子的摩尔比为1:1加入柠檬酸溶液，充分混合并滴入氨水调节pH值为7，静置片刻后于80℃水浴环境下搅拌直至形成黏稠状溶胶，然后经120℃干燥得到蓬松的棕黑色干凝胶。用酒精引燃，干凝胶自蔓延燃烧生成珊瑚状的灰化物，研细得到BaFe12O19前驱物。是什么意思？

The ba based on bafe12o19 stoichiometry Weigh (NO3) 2 and fe of (NO3) 3 dissolved in the appropriate amount of deionized water 9h2o. Add citric acid solution, mix well and trickle-down ammonia to adjust the ph value of 7, put it aside for a moment after the 80 ° C water bath environment under stirri

In accordance with BaFe O 12 19 than that of the chemical measure the Ba NO (3)2 and 3) Fe (NO H 2 9 3 • O dissolved in an appropriate amount of de-ionized water. The citric acid and metal ion of the Moore than a 1:1 to join citric acid solution, fully mixed and drop into the ammonia Adjust pH value

Takes Ba(NO3)2 and Fe(NO3)3 according to the BaFe12O19 chemistry measurement compared to the name•9H2O dissolves in the right amount deionized water.Compared to is 1:1 joins the ascorbic-citric solution according to citric acid and the

According to the BaFe12O19 stoichiometry preparation of Ba (NO3) 2 and Fe (NO3) 3 · 9H2O dissolved in an appropriate number of deionized water. According to the molar ratio of citric acid with metal ions to 1:1 by adding citric acid solution, mix thoroughly and drop into the ammonia regulate pH valu