Green gelcasting of CaCu3Ti4O12 ceramics

被引：8

作者：

Wan, Wei ^{[1
]}

Tang, Wenhua ^{[1
]}

Tao, Meizhen ^{[1
]}

Cao, Hailin ^{[1
]}

Luo, Junrong ^{[2
]}

Yuan, Wen-xiang ^{[3
]}

Qiu, Tai ^{[4
]}

机构：

[1] Huaihua Univ, Coll Chem & Mat Engn, Huaihua Key Lab Preparat Ceram Mat & Devices, Hunan Engn Lab Preparat Technol Polyvinyl Alcohol, Huaihua 418000, Peoples R China

[2] Huaihua Univ, Coll Biol & Food Engn, Huaihua 418000, Peoples R China

[3] Shenzhen Univ, Coll Chem & Chem Engn, Shenzhen Key Lab New Lithium Ion Battery & Mesopo, Shenzhen 518060, Peoples R China

[4] Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 210009, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2020年 / 31卷 / 07期

关键词：

HIGH-DIELECTRIC-CONSTANT; COLOSSAL PERMITTIVITY; TEMPERATURE;

D O I：

10.1007/s10854-020-03096-1

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

CaCu3Ti4O12 (CCTO) ceramics with desirable dielectric properties were prepared by a green gelcasting forming method combined with pressureless sintering. A non-toxic natural macromolecule, glutinous rice flour (GRF) was used as the gelling agent for the gelcasting process. The significant parameter, namely, the dosage of gelling agent was carefully studied so as to optimize the gelcasting process. The results showed that the dosage of GRF had evident effect on both gelcasting process and the final dielectric properties of CCTO ceramics. CCTO ceramics from the green body solidified with 3.5 wt% GRF showed relatively optimal dielectric properties, namely a dielectric constant up to 1.60 x 10(4) and a loss of only 0.063 (at 1 kHz test frequency). CCTO ceramics fabricated by this green gelcasting method have superior dielectric properties compared with that of the ceramics obtained by the dry pressing method.

引用

页码：5360 / 5367

页数：8

共 35 条

[1]

Adams TB, 2002, ADV MATER, V14, P1321, DOI 10.1002/1521-4095(20020916)14:18<1321::AID-ADMA1321>3.0.CO

[2]

2-P

[3] Gelcasting of zirconia using agarose [J].