Thermal properties of glycine phosphite across ferroelectric phase transition: a photopyroelectric study

Menon, C. Preethy; Philip, J.; Deepthy, A.; Bhat, H. L.

doi:10.1016/s0025-5408(01)00733-4

Cited by 24 publications

(8 citation statements)

References 12 publications

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“…In organic crystals phase transitions between polymorphs are very common and the mechanisms remain unknown despite of extensive investigations. No such detailed phase transition studies are reported in the literature for LAO, even though results are available for other organic crystals [11,12]. Hashizume et al [13] have observed the phase transition of Lethyl-3-urea by means of detailed temperature resolved single crystal diffraction method.…”

Section: Thermal Analysismentioning

confidence: 99%

Growth and Characterisation of Nonlinear Optical Single Crystals of L-Alaninium Oxalate

Arun¹,

Jayalekshmi²

2009

JMMCE

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Section: Thermal Analysismentioning

confidence: 99%

Growth and Characterisation of Nonlinear Optical Single Crystals of L-Alaninium Oxalate

Arun¹,

Jayalekshmi²

2009

JMMCE

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“…The generated thermal waves propagate through the sample and are detected by the pyroelectric detector, which is very sensitive to even very small changes in the heat flux. The detected signal current is proportional to the rate of temperature change [8,9]. The thermal diffusivity is a quantity that plays an essential role in the temperature response of materials that are dynamically heated (e.g., pulsed or sinusoidally modulated).…”

Section: Experimental Techniquementioning

confidence: 99%

Effect of Porosity on Thermal Conductivity of Al?Si?Fe?X Alloy Powder Compacts

Sastry

Froyen

Zhang

et al. 2004

International Journal of Thermophysics

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The thermal conductivity and thermal diffusivity of hot-and cold-pressed Al-17Si-5Fe-3.5Cu-1.1Mg-0.6Zr (mass%) alloy powder compacts were investigated as a function of the porosity volume fraction. Samples with a very low degree of porosity were produced by hot-pressing air atomized alloy powder with a particle size of 45-100 µm. The same powder was used to produce highly porous compacts by cold compaction using a manual press. The thermal diffusivity of the powder compacts was measured using a sinusoidal modulation photopyroelectric technique in a configuration that is similar to the laser flash method. The thermal diffusivity of the material decreases by a factor of about 13 with an increasing porosity of 25 vol% and a factor of about 300 at 60 vol % porosity. Since the calculated specific heat (weighted average of mass specific heat values of major alloy compounds) is much less porosity dependent, the porosity dependence of the thermal conductivity is similar to the thermal diffusivity and decreases exponentially with increasing porosity. Microstructural characterization of high porosity samples prepared by cold compaction indicated that the distribution of pores is not uniform over the cross-section. An interconnecting network of open and closed pores in the form of channels created pockets of porosity,

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“…A detailed description of the experimental set up and the determination of the thermal parameters of crystals by this technique has been reported elsewhere [18,19]. In order to get good uniform surface finish, the sample having a thickness of 0.63 mm was carefully polished using a polishing sheet.…”

Section: Photopyroelectric Study Of Thermal Propertiesmentioning

confidence: 99%

Growth, structural, thermal and optical properties of organic NLO crystal: N-methyllutidone trihydrate

Dhanuskodi¹,

Manivannan²,

Philip³

2004

Journal of Crystal Growth

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Thermal properties of glycine phosphite across ferroelectric phase transition: a photopyroelectric study

Cited by 24 publications

References 12 publications

Growth and Characterisation of Nonlinear Optical Single Crystals of L-Alaninium Oxalate

Growth and Characterisation of Nonlinear Optical Single Crystals of L-Alaninium Oxalate

Effect of Porosity on Thermal Conductivity of Al?Si?Fe?X Alloy Powder Compacts

Growth, structural, thermal and optical properties of organic NLO crystal: N-methyllutidone trihydrate

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