Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies
Dielectric constant and dielectric loss factor of rubber wood have been studied at different moisture content, grain direction and frequency. Different dielectric dispersion mechanisms are also observed at different ranges of moisture content. The moisture content above the fiber saturation point do...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Walter de Gruyter
1998
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| Online Access: | http://psasir.upm.edu.my/id/eprint/51276/ http://psasir.upm.edu.my/id/eprint/51276/1/51276.pdf |
| _version_ | 1848851788608831488 |
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| author | Kabir, Md. Firoz Wan Yusoff, Wan Mohamad Daud Khalid, Kaida Abd. Aziz, Sidek |
| author_facet | Kabir, Md. Firoz Wan Yusoff, Wan Mohamad Daud Khalid, Kaida Abd. Aziz, Sidek |
| author_sort | Kabir, Md. Firoz |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Dielectric constant and dielectric loss factor of rubber wood have been studied at different moisture content, grain direction and frequency. Different dielectric dispersion mechanisms are also observed at different ranges of moisture content. The moisture content above the fiber saturation point does not contribute much to the dielectric properties following a single dielectric mechanism. But the moisture content below the fiber saturation point shows considerable effect on the variations of dielectric properties having different dispersion processes at different moisture content ranges. Based on the shape of the curves, five different moisture content ranges have been identified such as 1) 25% and above, 2) 18-25%, 3) 11-17%, 4) 5-10% and 5) below 5%. It may be possible to explain all these dispersion processes by means of dielectric mechanism for dipole, quasi-dc and diffusive processes. Longitudinal direction shows a higher dielectric constant when compared to radial and tangential directions in ovendry condition. This dielectric anisotropy may be attributed to the microscopic, macroscopic and molecular structures of wood. |
| first_indexed | 2025-11-15T10:27:45Z |
| format | Article |
| id | upm-51276 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:27:45Z |
| publishDate | 1998 |
| publisher | Walter de Gruyter |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-512762017-07-04T03:27:58Z http://psasir.upm.edu.my/id/eprint/51276/ Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies Kabir, Md. Firoz Wan Yusoff, Wan Mohamad Daud Khalid, Kaida Abd. Aziz, Sidek Dielectric constant and dielectric loss factor of rubber wood have been studied at different moisture content, grain direction and frequency. Different dielectric dispersion mechanisms are also observed at different ranges of moisture content. The moisture content above the fiber saturation point does not contribute much to the dielectric properties following a single dielectric mechanism. But the moisture content below the fiber saturation point shows considerable effect on the variations of dielectric properties having different dispersion processes at different moisture content ranges. Based on the shape of the curves, five different moisture content ranges have been identified such as 1) 25% and above, 2) 18-25%, 3) 11-17%, 4) 5-10% and 5) below 5%. It may be possible to explain all these dispersion processes by means of dielectric mechanism for dipole, quasi-dc and diffusive processes. Longitudinal direction shows a higher dielectric constant when compared to radial and tangential directions in ovendry condition. This dielectric anisotropy may be attributed to the microscopic, macroscopic and molecular structures of wood. Walter de Gruyter 1998 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/51276/1/51276.pdf Kabir, Md. Firoz and Wan Yusoff, Wan Mohamad Daud and Khalid, Kaida and Abd. Aziz, Sidek (1998) Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies. Holzforschung, 52 (5). pp. 546-552. ISSN 0018-3830; ESSN: 1437-434X https://www.degruyter.com/view/j/hfsg.1998.52.issue-5/hfsg.1998.52.5.546/hfsg.1998.52.5.546.xml 10.1515/hfsg.1998.52.5.546 |
| spellingShingle | Kabir, Md. Firoz Wan Yusoff, Wan Mohamad Daud Khalid, Kaida Abd. Aziz, Sidek Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies |
| title | Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies |
| title_full | Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies |
| title_fullStr | Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies |
| title_full_unstemmed | Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies |
| title_short | Effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies |
| title_sort | effect of moisture content and grain direction on the dielectric properties of rubber wood at low frequencies |
| url | http://psasir.upm.edu.my/id/eprint/51276/ http://psasir.upm.edu.my/id/eprint/51276/ http://psasir.upm.edu.my/id/eprint/51276/ http://psasir.upm.edu.my/id/eprint/51276/1/51276.pdf |