Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique
Thermal diffusivity of zinc aluminum layered double hydroxide (Zn-Al-LDH) was measured by using photoflash technique. It used a simple camera flash and polyvinlidene diflouride (PVDF) film as signal generating source and detector respectively. Three series of sample were prepared at pH 7, 8 and...
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my-upm-ir.57122013-05-27T07:24:37Z Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique 2009 Ghaziean, Maryam Ranjbar Thermal diffusivity of zinc aluminum layered double hydroxide (Zn-Al-LDH) was measured by using photoflash technique. It used a simple camera flash and polyvinlidene diflouride (PVDF) film as signal generating source and detector respectively. Three series of sample were prepared at pH 7, 8 and 10 and with molar ratios of Zn to Al in a range from 2 to 6 (Zn/Al = 2, 3, 4, 5 and 6). The ZnO peaks appeared in x-ray diffraction pattern for all samples except for samples prepared at pH 7 with ratio 2 and 3 (Zn/Al = 2 and 3) and sample prepared at pH 8 with ratio 4. The ZnO peaks observed were between 2 = 30° to 2 = 37°. Thermal diffusivity for all three series samples (pHs 7, 8 and 10) was measured at room temperature. The thermal diffusivity for all three series of samples was found to increase for the case of molar ratio 2 to 6. The thermal diffusivity for Zn-Al-LDH at different ratios of Zn-Al-LDH increased with increasing ratio of Zn to Al. The increasing of thermal diffusivity is due to increasing of ZnO. Thermal diffusivity at pH 7, increased from 0.15 10−6m2 / s × to 0.22 10−6m2 / s × . Thermal diffusivity of sample prepared at pH 8 increased from 0.16 10−6m2 / s × to 0.20 10−6m2 / s × while at pH 10, if increased from 0.20 10−6m2 / s × to 0.25 10−6m2 / s × . Thermal diffusivity at pH 7 has the lowest value and at pH 10 has the highest value. The sample prepared at pH 7 with ratio 4 (Zn/Al = 4) was heat-treated at different temperature from 200°C to 600°C, prior to thermal diffusivity measurement at room temperature. In the case of heat treated samples, the thermal diffusivity increased from 0.25 10−6m2 / s × to 0.40 10−6m2 / s × with increasing treatment temperature. Zinc coating - Case studies 2009 Thesis http://psasir.upm.edu.my/id/eprint/5712/ http://psasir.upm.edu.my/id/eprint/5712/1/FS_2009_3_abstract.pdf application/pdf en public masters Universiti Putra Malaysia Zinc coating - Case studies Science English |
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English English |
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Zinc coating - Case studies |
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Zinc coating - Case studies Ghaziean, Maryam Ranjbar Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique |
| description |
Thermal diffusivity of zinc aluminum layered double hydroxide (Zn-Al-LDH) was
measured by using photoflash technique. It used a simple camera flash and
polyvinlidene diflouride (PVDF) film as signal generating source and detector
respectively.
Three series of sample were prepared at pH 7, 8 and 10 and with molar ratios of Zn to Al
in a range from 2 to 6 (Zn/Al = 2, 3, 4, 5 and 6).
The ZnO peaks appeared in x-ray diffraction pattern for all samples except for samples
prepared at pH 7 with ratio 2 and 3 (Zn/Al = 2 and 3) and sample prepared at pH 8 with
ratio 4. The ZnO peaks observed were between 2 = 30° to 2 = 37°. Thermal diffusivity for all three series samples (pHs 7, 8 and 10) was measured at room
temperature. The thermal diffusivity for all three series of samples was found to increase
for the case of molar ratio 2 to 6.
The thermal diffusivity for Zn-Al-LDH at different ratios of Zn-Al-LDH increased with
increasing ratio of Zn to Al. The increasing of thermal diffusivity is due to increasing of
ZnO. Thermal diffusivity at pH 7, increased from 0.15 10−6m2 / s × to 0.22 10−6m2 / s × .
Thermal diffusivity of sample prepared at pH 8 increased from 0.16 10−6m2 / s × to
0.20 10−6m2 / s × while at pH 10, if increased from 0.20 10−6m2 / s × to 0.25 10−6m2 / s × .
Thermal diffusivity at pH 7 has the lowest value and at pH 10 has the highest value.
The sample prepared at pH 7 with ratio 4 (Zn/Al = 4) was heat-treated at different
temperature from 200°C to 600°C, prior to thermal diffusivity measurement at room
temperature.
In the case of heat treated samples, the thermal diffusivity increased from
0.25 10−6m2 / s × to 0.40 10−6m2 / s × with increasing treatment temperature. |
| format |
Thesis |
| qualification_level |
Master's degree |
| author |
Ghaziean, Maryam Ranjbar |
| author_facet |
Ghaziean, Maryam Ranjbar |
| author_sort |
Ghaziean, Maryam Ranjbar |
| title |
Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique |
| title_short |
Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique |
| title_full |
Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique |
| title_fullStr |
Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique |
| title_full_unstemmed |
Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique |
| title_sort |
thermal diffusivity of zinc aluminum – layered double hydroxide using photoflash technique |
| granting_institution |
Universiti Putra Malaysia |
| granting_department |
Science |
| publishDate |
2009 |
| url |
http://psasir.upm.edu.my/id/eprint/5712/1/FS_2009_3_abstract.pdf |
| _version_ |
1747810469017550848 |