Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic Sheets
Linearity is an important factor that affects actuator accuracy. However, the high nonlinearity of KNN piezoelectric ceramics restricts their application in actuators. In this study, we used grinding stress to improve the linearity of ceramic chips, and used them to fabricate a laminated actuator. T...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-12-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/12/1/18 |
| _version_ | 1797343407809495040 |
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| author | Youming Zhang Qiang Hang Dongxi Zheng Fei Lin Caifeng Chen |
| author_facet | Youming Zhang Qiang Hang Dongxi Zheng Fei Lin Caifeng Chen |
| author_sort | Youming Zhang |
| collection | DOAJ |
| description | Linearity is an important factor that affects actuator accuracy. However, the high nonlinearity of KNN piezoelectric ceramics restricts their application in actuators. In this study, we used grinding stress to improve the linearity of ceramic chips, and used them to fabricate a laminated actuator. The ceramic sheets were ground to a thickness of 0.5 mm. During grinding, some areas of the ceramic changed from tetragonal to orthorhombic, owing to the grinding stress. The piezoelectric constant (d<sub>33</sub>) increased from 198 to 268 pC/N. Notably, the linearity of the ceramics improved. Seven pieces of ground ceramics were bound, to fabricate a laminated multilayer actuator with a total thickness of 3.5 mm. A DC voltage was applied to the actuator, and the displacement was measured. The displacement reached 0.73 μm under a low driving voltage of 200 V. A linear regression analysis of the displacement–voltage relationship was performed, obtaining the regression equation of the actuator. The linearity correlation coefficient was approximately 0.9903, implying that the actuator exhibits a high accuracy. The grinding stress improved the linearity, together with the piezoelectric properties of the ceramic chips, thus improving the actuator accuracy. This research will promote the application of KNN piezoelectric ceramics in actuators. |
| first_indexed | 2024-03-08T10:47:08Z |
| format | Article |
| id | doaj.art-500c0109063349b49c685a680cc5089a |
| institution | Directory Open Access Journal |
| issn | 2304-6740 |
| language | English |
| last_indexed | 2024-03-08T10:47:08Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Inorganics |
| spelling | doaj.art-500c0109063349b49c685a680cc5089a2024-01-26T17:04:01ZengMDPI AGInorganics2304-67402023-12-011211810.3390/inorganics12010018Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic SheetsYouming Zhang0Qiang Hang1Dongxi Zheng2Fei Lin3Caifeng Chen4School of Mechanical & Intelligent Manufacturing, Jiujiang University, Jiujiang 332005, ChinaSchool of Mechanical & Intelligent Manufacturing, Jiujiang University, Jiujiang 332005, ChinaSchool of Mechanical & Intelligent Manufacturing, Jiujiang University, Jiujiang 332005, ChinaSchool of Mechanical & Intelligent Manufacturing, Jiujiang University, Jiujiang 332005, ChinaSchool of Materials Engineering, Jiangsu University, Zhenjiang 212013, ChinaLinearity is an important factor that affects actuator accuracy. However, the high nonlinearity of KNN piezoelectric ceramics restricts their application in actuators. In this study, we used grinding stress to improve the linearity of ceramic chips, and used them to fabricate a laminated actuator. The ceramic sheets were ground to a thickness of 0.5 mm. During grinding, some areas of the ceramic changed from tetragonal to orthorhombic, owing to the grinding stress. The piezoelectric constant (d<sub>33</sub>) increased from 198 to 268 pC/N. Notably, the linearity of the ceramics improved. Seven pieces of ground ceramics were bound, to fabricate a laminated multilayer actuator with a total thickness of 3.5 mm. A DC voltage was applied to the actuator, and the displacement was measured. The displacement reached 0.73 μm under a low driving voltage of 200 V. A linear regression analysis of the displacement–voltage relationship was performed, obtaining the regression equation of the actuator. The linearity correlation coefficient was approximately 0.9903, implying that the actuator exhibits a high accuracy. The grinding stress improved the linearity, together with the piezoelectric properties of the ceramic chips, thus improving the actuator accuracy. This research will promote the application of KNN piezoelectric ceramics in actuators.https://www.mdpi.com/2304-6740/12/1/18lead-free piezoelectric ceramicsKNNactuatorgrindinglinearity |
| spellingShingle | Youming Zhang Qiang Hang Dongxi Zheng Fei Lin Caifeng Chen Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic Sheets Inorganics lead-free piezoelectric ceramics KNN actuator grinding linearity |
| title | Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic Sheets |
| title_full | Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic Sheets |
| title_fullStr | Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic Sheets |
| title_full_unstemmed | Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic Sheets |
| title_short | Fabrication of a Laminated Actuator with Excellent Linearity Using Ground Potassium Sodium Niobate-Based Ceramic Sheets |
| title_sort | fabrication of a laminated actuator with excellent linearity using ground potassium sodium niobate based ceramic sheets |
| topic | lead-free piezoelectric ceramics KNN actuator grinding linearity |
| url | https://www.mdpi.com/2304-6740/12/1/18 |
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