Stable selective coating “black nickel” for solar collector surfaces

Koltun, M. M.; Gukhman, G.; Gavrilina, A.

doi:10.1016/0927-0248(94)90287-9

Cited by 28 publications

(9 citation statements)

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“…Black nickel (NiS-ZnS) is formed by the electrodeposition of nickel on a metal substrate in the presence of zinc and sulfides. Different groups have modified the electrodeposition bath and process to produce coatings where α/ε(100°C)=0.88-0.96/0.03-0.10 for T<200°C [43][44][45][46]. Black nickel degrades in humid environments and on exposure to temperatures of 200°C and is therefore not applicable for CSP applications [47].…”

Section: 1b1 Chemical Conversionmentioning

confidence: 99%

Review of Mid- to High-Temperature Solar Selective Absorber Materials

Kennedy¹

2002

449

311

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Section: 1b1 Chemical Conversionmentioning

confidence: 99%

Review of Mid- to High-Temperature Solar Selective Absorber Materials

Kennedy¹

2002

449

311

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“…Electrodeposition techniques are a promising route to obtain spectrally selective solar absorbers, in particular for coloring metallic substrates [8]. Black nickel coatings have excellent optical properties, as they are strongly absorbing in the sunlight spectral region, with absorbance ≈ 0.88 ÷ 0.96 and low thermal emittance ≈ 0.10 ÷ 0.15, but they are not physically or chemically stable at > 200 ∘ C [9,10].…”

Section: Introductionmentioning

confidence: 99%

Optical and Structural Characterization of Nickel Coatings for Solar Collector Receivers

Pratesi

Sani

Lucia

2014

International Journal of Photoenergy

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The development of spectrally selective materials is gaining an increasing role in solar thermal technology. The ideal spectrally selective solar absorber requires high absorbance at the solar spectrum wavelengths and low emittance at the wavelengths of thermal spectrum. Selective coating represents a promising route to improve the receiver efficiency for parabolic trough collectors (PTCs). In this work, we describe an intermediate step in the fabrication of black-chrome based solar absorbers, namely, the fabrication and characterization of nickel coatings on stainless steel substrates. Microstructural characteristics of nickel surfaces are known to favorably affect further black chrome deposition. Moreover, the high reflectivity of nickel in the thermal infrared wavelength region can be advantageously exploited for reducing thermal emission losses. Thus, this report investigates structural features and optical properties of the nickel surfaces, correlating them to coating thickness and deposition process, in the perspective to assess optimal conditions for solar absorber applications.

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“…The nickel barrier is usually deposited with the same type of process as the selectively solar-absorbing coating. Nickel is electroplated on copper substrates in black chrome and black nickel solar absorbers [1][2][3], sputtered on aluminum in the nickel-nickel oxide absorber [4] and sputtered on aluminum and copper in the nickelquarts solar absorbers [5]. It has been observed that the thermal emittance is more dependent on the substrate in case of the sputtered absorbers.…”

Section: Introductionmentioning

confidence: 97%