Fabrication of planar thermocouples for real-time measurements of temperature profiles in polymer melts

Debey, D; Bluhm, Rüdiger; Habets, N; Kurz, H.

doi:10.1016/s0924-4247(97)01389-7

Cited by 37 publications

(20 citation statements)

References 2 publications

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“…The possible applications of the coating include thermoelectric energy conversion and temperature sensing. As is known, planar temperature sensors are useful in measuring temperatures of viscous fluids, for example, in polymer processing [54]. The variation of thermoelectric potential versus temperature change was tested using Coatings 2017, 7, 164 9 of 13 the facility as shown in Figure 2b.…”

Section: Resultsmentioning

confidence: 99%

Chemical Vapor Deposition of Bi-Te-Ni-Fe on Magnesium Oxide Substrate and Its Seebeck Effect

et al. 2017

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Abstract:In this work, a Bi-Te-Ni-Fe complex coating material was obtained on magnesium oxide substrate by a single step ambient pressure chemical vapor deposition (CVD). Nickel acetate, bismuth acetate, iron (III) nitrate, and tellurium (IV) chloride dissolved in N,N-dimethylformamide (DMF) served as the metal sources for Ni, Bi, Fe, and Te, respectively. Hydrogen was used as the carrier gas. The substrate was kept at 500 • C in a quartz tube reaction chamber. The chemical vapor deposition time was two hours. Scanning electron microscopic observation revealed porous morphology of the deposited material with a needle-like submicron fine structure. These needle-like entities form networks with fairly uniform distribution on the substrate. Thermoelectric property test showed that the coating is p-type with a Seebeck coefficient of 179 µV/K. Time-dependent potential data were obtained to show the sensitivity of the Seebeck effect to temperature changes.

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Section: Resultsmentioning

confidence: 99%

Chemical Vapor Deposition of Bi-Te-Ni-Fe on Magnesium Oxide Substrate and Its Seebeck Effect

et al. 2017

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“…マイクロ流体機器は化学，生物学，医学の分野における分析と診断をより高分解能，高感度，高速化することが可能な技術であり，Lab-on-a-Chip または micro-Total-Analysis-System（TAS）として開発が進められている．このような機器の設計と開発において化学反応や生体反応を制御するためにはマイクロ流路内の流体温度を計測し制御することが重要である (Guijt et al, 2002, Mao et al, 2002, Petersen et al, 2004, Rebrov et al, 2011)．例えば，マイクロ流路を用いた DNA シークエンサーではポリメラーゼ連鎖反応（Polymerase Chain Reaction, PCR）等の反応を高効率・高精度で制御するためには 0.1C の精度で温度を設定する必要がある (Sun et al, 2002, Liao et al, 2005, Chen et al, 2008, Kim et al, 2008, Lund-Olesen et al, 2008．マイクロ流路内の温度計測の手法において，薄膜熱電対 (Debby et al, 1997)や測温抵抗体 (Glasser et al, 1999 (Lakowicz, 1999, Ross et al, 2001, Yoon and Kim, 2006, Natrajan and Christensen, 2009)． LIF 法は蛍光強度に基づく測定であるため温度以外の蛍光消光の影響を受ける．例えば，溶存酸素で代表される衝突消光 (Jaboński, 1960, Arik et al, 2005)や，蛍光分子と消光分子とのが合成体を形成することで蛍光機能が低下する静的消光 (Song et al, 1995 The microchannel is placed on a temperature-controlled stage that can produce both uniform and linear temperature distributions in the channel. Three thermocouples are attached to the bottom side of the cover glass which configures the channel bottom wall.…”

Section: 緒言unclassified

Temperature measurement in microchannel liquid flow by measuring fluorescence polarization

Suzuki

Tatsumi

Horii

et al. 2017

Transactions of the JSME (In Japanese)

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A fluid temperature measurement technique based on fluorescence polarization is developed and applied to measure the two-dimensional temperature distributions in microchannel. In this measurement method, the fluorescence depolarization due to rotational Brownian motion of the fluorescent molecules in the solution is measured and converted to fluid temperature. Since the fluorescence polarization degree is independent to fluorescence intensity, the measurement is less influenced by the fluorescence quenching effect, which is an issue in laser-induced fluorescence (LIF) method. Experiments were performed using a microchannel with fluorescent molecules solved in water. The effects of the fluorescent molecule concentration, fluid pH and fluid temperature on the fluorescence polarization degree are discussed to evaluate the influence of the quenching effects and to derive the correlation curves. Furthermore, the proposed method was applied to measure the temperature distribution with linear gradient generated in the microchannel. The results showed that the fluorescence polarization is considerably less sensitive to quenching factors compared with the fluorescence intensity measurements. A linear correlation between the polarization degree and the fluid temperature was obtained. This relationship agreed well with the theoretical one. Further, measurement of two-dimensional temperature distribution in the microchannel agreed well with the values obtained by the thermocouple measurements. These results confirmed the validity of the measurements and feasibility of the proposed method.

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“…Various methods are used to measure the temperature within the polymer during injection moulding process. Some methods use rigid plans equipped with thermocouples (Debey et al, 1997), grids of thermocouples (Sombatsompop et al, 1999) or mesh of thermocouple needle . Other authors (Lai and Rietveld, 1996;Bendada et al, 2003) use infrared sensors.…”

Section: Introductionmentioning

confidence: 99%

Change on temperature at the surface of injection moulded parts

Nicolazo

Sarda

Vachot

et al. 2010

Journal of Materials Processing Technology

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Fabrication of planar thermocouples for real-time measurements of temperature profiles in polymer melts

Cited by 37 publications

References 2 publications

Chemical Vapor Deposition of Bi-Te-Ni-Fe on Magnesium Oxide Substrate and Its Seebeck Effect

Chemical Vapor Deposition of Bi-Te-Ni-Fe on Magnesium Oxide Substrate and Its Seebeck Effect

Temperature measurement in microchannel liquid flow by measuring fluorescence polarization

Change on temperature at the surface of injection moulded parts

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