溶胶-凝胶法制备高纯钛酸钡粉体的研究

doi:10.19964/j.issn.1006-4990.2024-0306

Abstract

Abstract:

Barium titanate is widely used in the electronics industry and known as“the pillar of the electronic ceramic industry”.The traditional sol-gel method mainly uses organic solvents and organometallic salts as raw materials to prepare barium titanate，which has problems such as high raw material cost and three wastes discharge.In this study，high purity barium nitrate was prepared by carbothermic reduction，hot water leaching，acidification and crystallization of barite from abundant barite ore in Guizhou province.High purity barium titanate powder was prepared by sol-gel method using water as solvent and barium nitrate and inorganic titanium salt as raw materials through hydrolysis，aging，evaporation，dehydration and roasting.The effect of sol-gel process conditions on the purity and crystal phase of barium titanate was focused，and a sol-gel method with water as solvent was obtained to prepare high purity barium titanate.Under the optimum conditions of material ratio n（barium nitrate）∶n（barium nitrate）∶n（citric acid）=1∶1.01∶2，roasting temperature of 1 100 ℃ and roasting time of 180 min，the high purity Barium titanate powder was prepared as tetraneous crystal phase with principal component content of 99.85%.The quality met the requirements of HG/T 3587—2009 “high purity barium titanate for electronic industry”.This study provided theoretical and feasible guidance for the high value utilization of barite.

Key words: barite, barium nitrate, sol-gel method, barium titanate

CLC Number:

TQ132.35

FENG Lunwei, LIU Yan, XIE Yan. Study on preparation of high purity barium titanate powder by sol-gel method[J]. Inorganic Chemicals Industry, 2024, 56(12): 56-61.

Figures/Tables 12

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References 22

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w（BaO）	w（SO₃）	w（SiO₂）	w（CaO）	w（MgO）	w（Fe₂O₃）
59.20	26.60	6.58	4.06	1.28	0.44
w（Na₂O）	w（K₂O）	w（SrO）	w（ZnO）	w（Al₂O₃）	w（其他）
0.32	0.19	0.14	0.03	0.91	0.25

物料比	钛酸钡中各杂质的质量分数/%
物料比	SrO	Na₂O	K₂O	Fe₂O₃	MgO	CaO	Al₂O₃
n（硝酸钡）∶n（硝酸氧钛）∶n（柠檬酸）=1∶1.01∶1.4	0.000 023	0.000 42	0.001 230	0.002 05	0.003 91	0.004 81	0.001 06
n（硝酸钡）∶n（硝酸氧钛）∶n（柠檬酸）=1∶1.01∶2.0	0.000 098	0.001 34	0.000 581	0.001 04	0.001 05	0.005 18	0.004 97
n（硝酸钡）∶n（硝酸氧钛）∶n（柠檬酸）=1∶1.01∶2.8	0.000 108	0.001 24	0.001 306	0.003 09	0.002 68	0.006 17	0.002 67

项目	w（BaTiO₃）/%	w（Fe₂O₃）/%	w（MgO）/%	w（Al₂O₃）/%	w（CaO）/%	w（SrO）/%	w（SiO₂）/%
本产品	99.85	0.003	0.000 3	≤0.000 1	0.002	0.000 4	0.004
HG/T 3587—2009	≥98.6	≤0.003	≤0.005	≤0.005	≤0.005	≤0.02	≤0.006

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Inorganic Acid-Base-Salt Committee of CIESC

Study on preparation of high purity barium titanate powder by sol-gel method

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