甘氨酸对固相法合成钛酸钡粉体的影响

doi:10.19964/j.issn.1006-4990.2022-0559

Abstract

Abstract:

Barium titanate（BT） powders were synthesized by solid-state reaction using BaCO₃ and TiO₂ as raw materials and glycine as additive.The effects of different synthesis temperatures and glycine addition on the properties of BT powder were studied.The synthesized BT powders were characterized by XRD，BET，SEM，DSC and TG.The results showed that the addition of glycine could promote the decomposition of BaCO₃ near 650 ℃ and reduce the synthesis temperature of BT powder by 50 ℃.After adding glycine，pure phase BT could be obtained at 900 ℃，and BT powder with c/a>1.010 could be obtained at 1 000 ℃.However，the addition of excessive glycine made the particle size increase sharply，which would deteriorate the performance of BT powder.The BT powder with c/a=1.010 3，average particle size of 520 nm and k=9.00 could be obtained by adding 15% glycine at 1 000 ℃ for 2 h，and its performance was better than that of commercial BT powder with 600 nm.BT ceramics were obtained by sintering commercial powder and synthetic powder with 15% glycine at 1 280 ℃，respectively.Comparing the dielectric properties of the two ceramics，it was found that the dielectric constants of the former at room temperature and Curie point were slightly larger than those of the latter，but the dielectric loss was increased obviously due to the orthorhombic-tetragonal phase transition peak at room temperature.

Key words: BaTiO₃, glycine, tetragonality, k-factor, dielectric properties

CLC Number:

TQ132.35

LI Xuemei, HUANG Fuxiang, LONG Min, TIAN Zhongqing, MENG Fancheng, LUO Xiaoyang. Effect of glycine on solid-state synthesis of barium titanate powder[J]. Inorganic Chemicals Industry, 2023, 55(7): 65-69.

Figures/Tables 8

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References 16

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样品编号	质量损失率/%
样品编号	约200 ℃	400~600 ℃	700~960 ℃
GL-0	—	—	14.9
GL-2.5	0.1	—	14.9
GL-5	0.4	0.6	14.7
GL-7.5	2.0	2.2	14.4
GL-10	2.6	3.3	13.1
GL-15	4.5	5.6	12.6
GL-20	5.2	5.4	12.9
GL-25	6.0	5.3	13.0

样品编号	950 ℃		1 000 ℃		1 050 ℃		1 100 ℃
样品编号	c/a	k	c/a	k	c/a	k	c/a	k
GL-0	1.005 4	1.35	1.008 3	1.83	1.009 9	7.81	1.009 9	7.76
GL-2.5	1.006 9	1.17	1.008 1	1.74	1.009 8	5.36	1.009 5	6.07
GL-5	1.006 9	1.44	1.009 1	3.19	1.009 9	11.27	1.010 2	9.26
GL-7.5	1.008 3	1.36	1.008 9	3.23	1.010 1	13.73	1.010 3	11.76
GL-10	1.006 8	1.56	1.009 7	5.93	1.009 9	7.92	1.010 6	11.76
GL-15	1.008 4	1.68	1.010 3	9.00	1.010 3	9.00	1.010 5	13.85
GL-20	1.008 2	1.69	1.009 6	6.06	1.010 1	9.59	1.010 0	11.58
GL-25	1.008 8	1.82	1.009 7	4.97	1.009 9	8.09	1.010 3	12.68

样品编号	粒径/nm
样品编号	1 000 ℃	1 050 ℃	1 100 ℃
GL-0	390	410	470
GL-2.5	410	470	630
GL-5	440	520	730
GL-7.5	480	590	740
GL-10	500	610	750
GL-15	520	650	760
GL-20	540	710	830
GL-25	570	740	860

[1]	Li Yiyi,Sun Qiaoyi,Ma Linge,Zhuo Jinde,Song Weiguo. Study on mineralization-desorption and regeneration of post-CO₂ capture by glycine salt [J]. Inorganic Chemicals Industry, 2021, 53(2): 38-41.
[2]	Ouyang Linhong,Wang Wenqian,Wang Wenwei,Wu Jieru,Xue Hao. Dielectric properties and electrocaloric effect of SiO₂ doped Ba_0.65Sr_0.35TiO₃ ceramics [J]. Inorganic Chemicals Industry, 2020, 52(3): 39-44.
[3]	HAN Shu-Fen, CHEN Wei-Wei, YU Jie. Study on synthesis and properties of barium titanate nano-composites [J]. INORGANICCHEMICALSINDUSTRY, 2016, 48(12): 19-.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Effect of glycine on solid-state synthesis of barium titanate powder

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