Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/541
| Title: | Lead-free ceramics for pyroelectric applications | Authors: | Lau, ST Cheng, CH Choy, SH Lin, D Kwok, KW Chan, HLW |
Issue Date: | 23-May-2008 | Source: | Journal of applied physics, 23 May 2008, v. 103, no. 10, 104105, p. 1-4 | Abstract: | The use of lead-free materials has recently become a very important issue in environmental protection of the earth. Two groups of lead-free ceramics, (K[sub 0.5],Na[sub 0.5])NbO₃ based (KNN) and Bi[sub 1−y](Na[sub x]K[sub 1−x])[sub y]TiO₃ based (BNKT), were studied for their thermal, dielectric, and pyroelectric properties as candidates for pyroelectric sensor applications. The BNKT-based ceramic, [Bi[sub 0.5](Na[sub 0.94]K[sub 0.05]Li[sub 0.016])[sub 0.5]][sub 0.95]Ba[sub 0.05]TiO₃ (BNKLBT), shows excellent pyroelectric properties when compared with KNN-based ceramic and lead zirconate titanate. Its properties were measured as follows: pyroelectric coefficient p=360 µC/m²K, pyroelectric figure of merit of current, voltage, and detectivity F[sub i]=221 pm/V, F[sub v]=0.030 m²/C, and F[sub d]=14.8 µPa[sup −½]. With these outstanding pyroelectric properties, the BNKLBT ceramic can be a promising material for pyroelectric sensor applications. The BNKLBT ceramic with different thicknesses (i.e., 0.3, 0.5, and 0.7 mm) have been used as the sensing element for fabricating infrared detectors. The current responsivity of the sensors was evaluated as functions of frequency. | Keywords: | Bismuth compounds Ceramics Potassium compounds Pyroelectric detectors Pyroelectricity Sodium compounds |
Publisher: | American Institute of Physics | Journal: | Journal of applied physics | ISSN: | 0021-8979 | EISSN: | 1089-7550 | Rights: | © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S.T. Lau et al., J. Appl. Phys. 103, 104105 (2008) and may be found at http://link.aip.org/link/?jap/103/104105 |
| Appears in Collections: | Journal/Magazine Article |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| lead-free-ceramics_08.pdf | 259.05 kB | Adobe PDF | View/Open | |
| erratum_lead_free_ceramics.pdf | 614.73 kB | Adobe PDF | View/Open |
Access
View full-text via PolyU eLinks 
Page views
150
Last Week
2
2
Last month
Citations as of Jun 4, 2023
Downloads
710
Citations as of Jun 4, 2023
SCOPUSTM
Citations
116
Last Week
1
1
Last month
1
1
Citations as of Jun 2, 2023
WEB OF SCIENCETM
Citations
55
Last Week
0
0
Last month
0
0
Citations as of Jun 1, 2023
Google ScholarTM
Check
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.