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- W148834536 abstract "Thermal diffusivity of zinc aluminum layered double hydroxide (Zn-Al-LDH) wasmeasured by using photoflash technique. It used a simple camera flash andpolyvinlidene diflouride (PVDF) film as signal generating source and detectorrespectively.Three series of sample were prepared at pH 7, 8 and 10 and with molar ratios of Zn to Alin 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 samplesprepared at pH 7 with ratio 2 and 3 (Zn/Al = 2 and 3) and sample prepared at pH 8 withratio 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 roomtemperature. The thermal diffusivity for all three series of samples was found to increasefor the case of molar ratio 2 to 6.The thermal diffusivity for Zn-Al-LDH at different ratios of Zn-Al-LDH increased withincreasing ratio of Zn to Al. The increasing of thermal diffusivity is due to increasing ofZnO. 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 × to0.20 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 differenttemperature from 200°C to 600°C, prior to thermal diffusivity measurement at roomtemperature.In the case of heat treated samples, the thermal diffusivity increased from0.25 10−6m2 / s × to 0.40 10−6m2 / s × with increasing treatment temperature." @default.
- W148834536 created "2016-06-24" @default.
- W148834536 creator A5008892721 @default.
- W148834536 date "2009-01-01" @default.
- W148834536 modified "2023-09-23" @default.
- W148834536 title "Thermal Diffusivity of Zinc Aluminum – Layered Double Hydroxide Using Photoflash Technique" @default.
- W148834536 hasPublicationYear "2009" @default.
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