FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W587450849> ?p ?o ?g. }

• W587450849 abstract "The open photoacoustic cell (OPC) technique was used for measuring thermaldiffusivity of solid samples. It is based upon the measurement of the photoacousticsignal as a function of the modulation frequency in the region where the thermaldiffusion length equals to the-sample thickness. The measurements were carried outat room temperature for samples metal, alloy, semiconductor, polymer andsuperconductor. The measured thermal diffusivity values for metal, semiconductorand polymer samples are in good agreement with the values reported previously byother researchers. The thermal diffusivity values of the AgxAu1-x alloys decreasefrom 1.48 cm2/s (pure Ag) to a minimum value at around x = 0.70 before increasingtowards the value of 1.28 cm2/s (pure Au). In AuxCu(l00-x)07Ag(l00-x)O.3 alloy system,the thermal diffusivity values decrease with the increasing of the weight fraction xand reaching a minimum at around x = 90 composition. Then, the thermal diffusivity values tend to increase to the value of 1.28 cm2/s for the pure Aumetal. For superconductor samples in the normal state, the measured thermaldiffusivity decreases with the increase of Zn content in the BbPbo.6Sr2Ca2-xZnxCu30osystem, However, the thermal diffusivity values increase with the increasing of Badopant in the Bi2Pbo.6Sr2Ca2-xBaxCu30o system.The OPC detection was also used to monitor the evaporation time of the liquidsamples. The evaporation time for 10.60 mm3 of acetone, chloroform, methanol andethanol samples were recorded as 236.7s, 578.8s, 436.2s and 869.2s respectively.The results also show that the liquid evaporation time is inversely proportional to thelaser power.The laser beam power in the range of (2-16) m W was monitored by using OPC,closed photoacoustic cell (CPC) and piezoelectric (PZT) detections. In each case,the photoacoustic (PA) signals were found to be linear up to the laser power of 16m W. In comparison, the power meter responsivity for CPC detection always higherthan OPC and followed by PZT detection.Finally, the thermal lens technique was used to determine the thermal diffusivity ofliquid samples. The phenomenon of thermal lensing is due to the refractive indexchange with temperature in a liquid medium causes by the periodic photothermalheating. The change of the refractive index will turn the heated medium into a lens.By measuring the time dependence of the laser intensity change after passed though the thermal lens, the thermal diffusivity of the sample can be obtained. In this work,the measurements were carried out for various solvents, fuel, palm oils and chitosanat different concentration. It was found that the thermal lens technique was suitablefor measuring thermal diffusivity value of liquids in the range of (9.09 x 10-4 - 12. 1 X 10-4) cm2/s." @default.
• W587450849 created "2016-06-24" @default.
• W587450849 creator A5040683583 @default.
• W587450849 date "2000-05-01" @default.
• W587450849 modified "2023-09-27" @default.
• W587450849 title "Thermal diffusivity measurement using photoacoustic and thermal lens techniques" @default.
• W587450849 hasPublicationYear "2000" @default.
• W587450849 type Work @default.
• W587450849 sameAs 587450849 @default.
• W587450849 citedByCount "0" @default.
• W587450849 crossrefType "dissertation" @default.
• W587450849 hasAuthorship W587450849A5040683583 @default.
• W587450849 hasConcept C108225325 @default.
• W587450849 hasConcept C113196181 @default.
• W587450849 hasConcept C121332964 @default.
• W587450849 hasConcept C166841482 @default.
• W587450849 hasConcept C185592680 @default.
• W587450849 hasConcept C191952053 @default.
• W587450849 hasConcept C192562407 @default.
• W587450849 hasConcept C37668627 @default.
• W587450849 hasConcept C43617362 @default.
• W587450849 hasConcept C49040817 @default.
• W587450849 hasConcept C57863236 @default.
• W587450849 hasConcept C61441594 @default.
• W587450849 hasConcept C97355855 @default.
• W587450849 hasConceptScore W587450849C108225325 @default.
• W587450849 hasConceptScore W587450849C113196181 @default.
• W587450849 hasConceptScore W587450849C121332964 @default.
• W587450849 hasConceptScore W587450849C166841482 @default.
• W587450849 hasConceptScore W587450849C185592680 @default.
• W587450849 hasConceptScore W587450849C191952053 @default.
• W587450849 hasConceptScore W587450849C192562407 @default.
• W587450849 hasConceptScore W587450849C37668627 @default.
• W587450849 hasConceptScore W587450849C43617362 @default.
• W587450849 hasConceptScore W587450849C49040817 @default.
• W587450849 hasConceptScore W587450849C57863236 @default.
• W587450849 hasConceptScore W587450849C61441594 @default.
• W587450849 hasConceptScore W587450849C97355855 @default.
• W587450849 hasLocation W5874508491 @default.
• W587450849 hasOpenAccess W587450849 @default.
• W587450849 hasPrimaryLocation W5874508491 @default.
• W587450849 hasRelatedWork W184561448 @default.
• W587450849 hasRelatedWork W1996468934 @default.
• W587450849 hasRelatedWork W2018387078 @default.
• W587450849 hasRelatedWork W2038228286 @default.
• W587450849 hasRelatedWork W2045101306 @default.
• W587450849 hasRelatedWork W2068718678 @default.
• W587450849 hasRelatedWork W2076664704 @default.
• W587450849 hasRelatedWork W2124192237 @default.
• W587450849 hasRelatedWork W2147270508 @default.
• W587450849 hasRelatedWork W2306852809 @default.
• W587450849 hasRelatedWork W2313716916 @default.
• W587450849 hasRelatedWork W2325470026 @default.
• W587450849 hasRelatedWork W2413395394 @default.
• W587450849 hasRelatedWork W2497261125 @default.
• W587450849 hasRelatedWork W2899528853 @default.
• W587450849 hasRelatedWork W3005562021 @default.
• W587450849 hasRelatedWork W3170352643 @default.
• W587450849 hasRelatedWork W3201538769 @default.
• W587450849 hasRelatedWork W62691536 @default.
• W587450849 hasRelatedWork W2868584948 @default.
• W587450849 isParatext "false" @default.
• W587450849 isRetracted "false" @default.
• W587450849 magId "587450849" @default.
• W587450849 workType "dissertation" @default.