On the application of the photoacoustic methods for the determination of thermo-optical properties of polymers

Bento, A. C.; Dias, Daniele Toniolo; Olenka, L.; Medina, A. N.; Baesso, Mauro Luciano

doi:10.1590/s0103-97332002000300006

Cited by 31 publications

(10 citation statements)

References 35 publications

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“…Within the transient and frequency-dependent techniques are the laser-flash technique [38], thermal lens spectroscopy [39], photoacoustic spectroscopy in its different modalities of open cell [40], closed cell [41], two-beam cell [42], etc. ; as well as the photoelectric spectroscopy [43].…”

Section: Thermal Conductivity Determinationmentioning

confidence: 99%

Impact of the Glancing Angle Deposition on the Yttria-Stabilized Zirconia Growth and Their Thermal Barrier Coating Properties

Amaya¹,

Prías‐Barragán²,

Caicedo³

et al. 2019

Coatings and Thin-Film Technologies

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Yttria-stabilized zirconia (YSZ) is the most common material used as a thermal barrier in several engineering applications. The majority of films produced by physical vapor deposition (PVD) techniques use normal incidence and lead to the columnar growth normal to the substrate. The typical columnar structure of sputter-deposited films is largely influenced, among other parameters, by pressure, temperature, thickness, and the ion-toatom ratio incident at the substrate or substrate bias voltage. Another important experimental parameter used to modify the film properties is the direction of the incident flux of the depositing species with respect to the substrate surface. In this chapter an oblique angle deposition (OAD) approach was used to grow YSZ with tilted columnar structures, to study the impact of this deposition technique on the microstructure, morphology, and, correspondingly, the thermal conductivity of YSZ films, in order to improve the insulator potential of these thin films. Additionally, in the chapter, we present a detailed description of the oblique angle deposition (OAD) technique and double-layer model used for determination of the effective thermal conductivity of YSZ samples grown over thick substrates.

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Section: Thermal Conductivity Determinationmentioning

confidence: 99%

Impact of the Glancing Angle Deposition on the Yttria-Stabilized Zirconia Growth and Their Thermal Barrier Coating Properties

Amaya¹,

Prías‐Barragán²,

Caicedo³

et al. 2019

Coatings and Thin-Film Technologies

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show abstract

“…In the photoacoustic measurements, the thermal diffusion length (μ s ) defines the sample skin depth which contributes to the signal (18,22). This parameter is defined as μ s =(d/πf) , 1/2 , in which d is the sample thermal diffusivity and f the light modulation frequency.…”

Section: Penetration Rate Evaluated By Photoacoustic Spectroscopymentioning

confidence: 99%

Evidence of Deep Percutaneous Penetration Associated with Anti-Inflammatory Activity of Topically Applied Helicteres gardneriana Extract: A Photoacoustic Spectroscopy Study

et al. 2010

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“…The experimental setup is described in Fig. 1 [10]. The radiation source is Monochromatic light is then diffracted in a narrow band wavelength by a grating monochromator (Oriel 77296), which permits the scanning of a region from 200 to 800 nm.…”

Section: Photoacoustic Spectroscopymentioning

confidence: 99%

Photoacoustic spectroscopy to determine the optical properties of thin film 4H-SiC

et al. 2006

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The optical transitions in a range of 1.5-5.2 eV of n-type 4H-SiC have been investigated experimentally by photoacoustic spectroscopy and theoretically by a full-potential linearized augmented plane wave method. From the absorption spectrum, we found the indirect optical bandgap at 3.2 eV and the direct transitions around 4.5 eV in very good agreement with what has been predicted by theoretical calculations.

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On the application of the photoacoustic methods for the determination of thermo-optical properties of polymers

Cited by 31 publications

References 35 publications

Impact of the Glancing Angle Deposition on the Yttria-Stabilized Zirconia Growth and Their Thermal Barrier Coating Properties

Impact of the Glancing Angle Deposition on the Yttria-Stabilized Zirconia Growth and Their Thermal Barrier Coating Properties

Evidence of Deep Percutaneous Penetration Associated with Anti-Inflammatory Activity of Topically Applied Helicteres gardneriana Extract: A Photoacoustic Spectroscopy Study

Photoacoustic spectroscopy to determine the optical properties of thin film 4H-SiC

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