Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics
A series of Barium Titanate with an average density of 94.5%, an average shrinkage rate of 13.8% and an average grain size of 0.4 μm to 62.5 μm are successfully produced by two-step sintering method. The effect of the different sintering temperatures on the microstructure of Barium Titanate was stud...
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | |
| التنسيق: | Final Year Project (FYP) |
| اللغة: | English |
| منشور في: |
2019
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://hdl.handle.net/10356/76911 |
| _version_ | 1826126064818061312 |
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| author | Chua, Lin Xiao |
| author2 | Gan Chee Lip |
| author_facet | Gan Chee Lip Chua, Lin Xiao |
| author_sort | Chua, Lin Xiao |
| collection | NTU |
| description | A series of Barium Titanate with an average density of 94.5%, an average shrinkage rate of 13.8% and an average grain size of 0.4 μm to 62.5 μm are successfully produced by two-step sintering method. The effect of the different sintering temperatures on the microstructure of Barium Titanate was studied and subsequently, the effect the microstructure has on the dielectric properties of Barium Titanate. The report found that the sintering temperature 1250°C and below produced fine-grained microstructure and possesses a pseudocubic phase. On the other hand, sintering temperature 1310°C and above produced coarse-grained microstructure and a tetragonal phase. Sintering temperature of 1280°C has shown to produce a microstructure with a mixture of both types of grains and consists of a mixture of cubic and tetragonal phase. A range of dielectric constants from 1500 to 4500 can be obtained from the Barium Titanate samples. The Curie temperature of the Barium Titanate samples are also obtained, showing an increase from 130℃ to 140.5℃ as the sintering temperature increases from 1200℃ to 1400℃. This results show that it is possible to produce Barium Titanate ceramics with excellent dielectric constant and is thus useful to applications on capacitors. |
| first_indexed | 2024-10-01T06:46:38Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/76911 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:46:38Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/769112023-03-04T15:38:26Z Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics Chua, Lin Xiao Gan Chee Lip School of Materials Science and Engineering DRNTU::Engineering::Materials A series of Barium Titanate with an average density of 94.5%, an average shrinkage rate of 13.8% and an average grain size of 0.4 μm to 62.5 μm are successfully produced by two-step sintering method. The effect of the different sintering temperatures on the microstructure of Barium Titanate was studied and subsequently, the effect the microstructure has on the dielectric properties of Barium Titanate. The report found that the sintering temperature 1250°C and below produced fine-grained microstructure and possesses a pseudocubic phase. On the other hand, sintering temperature 1310°C and above produced coarse-grained microstructure and a tetragonal phase. Sintering temperature of 1280°C has shown to produce a microstructure with a mixture of both types of grains and consists of a mixture of cubic and tetragonal phase. A range of dielectric constants from 1500 to 4500 can be obtained from the Barium Titanate samples. The Curie temperature of the Barium Titanate samples are also obtained, showing an increase from 130℃ to 140.5℃ as the sintering temperature increases from 1200℃ to 1400℃. This results show that it is possible to produce Barium Titanate ceramics with excellent dielectric constant and is thus useful to applications on capacitors. Bachelor of Engineering (Materials Engineering) 2019-04-23T13:19:54Z 2019-04-23T13:19:54Z 2019 Final Year Project (FYP) http://hdl.handle.net/10356/76911 en Nanyang Technological University 38 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials Chua, Lin Xiao Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics |
| title | Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics |
| title_full | Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics |
| title_fullStr | Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics |
| title_full_unstemmed | Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics |
| title_short | Synthesis and characterisation of Barium Titanate (BT) dielectric ceramics |
| title_sort | synthesis and characterisation of barium titanate bt dielectric ceramics |
| topic | DRNTU::Engineering::Materials |
| url | http://hdl.handle.net/10356/76911 |
| work_keys_str_mv | AT chualinxiao synthesisandcharacterisationofbariumtitanatebtdielectricceramics |