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超重力-水热法制备形貌可控的钛酸锶钡粉体

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零维和多维结构的钛酸锶钡(Ba1-xSrxTiO3,BST)粉体分别具有高比表面积和高长径比的优势,为提升材料性能并扩大电子元件中原材料的工业化应用,改善粉体制备过程中分布不均、耗时长的问题,采用撞击流-旋转填料床(IS-RPB)结合水热法制备了添加丙三醇的BST粉体,考察了水热温度、水热时间及丙三醇添加量等因素对BST粉体形貌的影响规律.结合X-射线衍射仪(XRD)、扫描电子显微镜(SEM)以及透射电子显微镜(TEM)对BST粉体的形貌、晶相及组成进行了表征分析.结果表明:在超重力因子为40、撞击初速度10.61 m/s、水热温度180℃、水热时间12 h的条件下,当添加少量丙三醇时,其充当分散剂的作用,所制得的BST粉体为均匀性与分散性良好的纳米球形颗粒;当添加较多丙三醇时,其充当溶剂的作用,在水热条件下沿单元晶面生长得到了片状及花状形貌.本文提出的超重力-水热法及丙三醇的添加对于工业化形貌可控制备BST粉体探索提供了一种方便快捷的途径.
Preparation of Barium Strontium Titanate Powder with Controllable Morphology by High-Gravity and Hydrothermal Method
Zero-dimensional and multidimensional structures of barium strontium titanate(Ba1-xSrxTiO3,BST)powders have the advantages of high specific surface area and high aspect ratio,respectively.To improve the material properties,expand the industrial application of raw materials in electronic compo-nents and improve the uneven distribution and long time in the preparation process of powder,BST pow-der with glycerol were prepared by impinging stream-rotating packed bed(IS-RPB)combined hydrother-mal method.The effects of hydrothermal temperature,hydrothermal time and the amount of glycerol added to the morphology of BST powder were investigated.The morphology,crystal phase and composi-tion of BST powder were characterized by X-ray diffractometer(XRD),scanning electron microscope(SEM)and transmission electron microscope(TEM).The results show that under the conditions of supergravity factor of 40,initial impact velocity of 10.61 m/s,hydrothermal temperature of 180℃and hydrothermal time of 12 h,when a small amount of glycerol is added,it acts as a dispersant,and the BST powder is prepared as nano spherical particles with good uniformity and dispersion.When more glyc-erol is added,it acts as a solvent and grew along the unit crystal surface under hydrothermal conditions to obtain flake and flower-like morphology.In this paper,the high-gravity hydrothermal method and the addition of glycerol have explored a convenient and fast way for the preparation of BST powder with con-trollable morphology in industrial industry.

hydrothermal methodimpinging stream-rotating packed bedbarium strontium titanateglyc-erolmorphological control

马瑶、袁志国、李宇龙、付艺婷、张雅倩、贾正娜、孔哲

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中北大学 化学与化工学院,山西 太原 030051

中北大学 化工过程强化山西省重点实验室,山西 太原 030051

水热法 撞击流-旋转填料床 钛酸锶钡 丙三醇 形貌调控

山西省自然科学基金资助项目

202203021211098

2024

中北大学学报(自然科学版)
中北大学

中北大学学报(自然科学版)

影响因子:0.258
ISSN:1673-3193
年,卷(期):2024.45(5)
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