Tungsten halogen lamp coated with infrared-raay-reflective film

Kawakatsu, Akira; Ishizaki, Ariyoshi; Yuge, Yoji; Watanabe, Tsutomu

doi:10.2150/jieij1980.69.appendix_1

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“…2.3 HIGH REFRACTIVE INDEX LA VERS; n > 2.0 Sol-gel layers of high refractive index, n > 2.0, wh ich do not ab so rb in the visible spectral range are restricted to the oxides ofTi [20,21], Zr [22], Ta [23] and Nb [24]. Layers of the highest refractive index have to be obtained on the base of Ti02.…”

Section: Medium Refractive Indexmentioning

confidence: 99%

“…Stacks of up to 13 layers and a total thickness of 1.5 to 211m could be realized with Ti02 and Si02 layers without peeling off, if 8 or P was added to the Sial [22]. Various systems based on Si02 and the oxides of Ti, Hf, Zr, Nb, Ta and mixtures of those were investigated aiming for more effective filters on highly loaded linear lamps of fused silica [14].…”

Section: Interference Stacksmentioning

confidence: 99%

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Coatings for High Temperature Use

Köstlin¹

2004

Sol-Gel Technologies for Glass Producers and Users

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Oxidation resistant nickel-aluminide coatings are designed to develop a protective alumina scale during high temperature exposure. It is well established that platinum additions, typically about 6-8 at%, provide substantial improvements in oxidation resistance of such coatings, yet the nature of the platinum effect is still not fully understood. In this work, the oxidation behavior of two commercial NiAl and NiPtAl coatings deposited on the same Ni-base single crystal alloy CMSX-4 was analyzed. Cyclic and isothermal oxidation tests were conducted at 1150 o C in air. Microstructure development and alumina/coating interface chemistry were studied as a function of oxidation time. Numerous voids developed at the Al 2 O 3 /NiAl interface, and sulfur was found to segregate at the void surfaces and at the contact interface, leading to spallation of the scale over the convex areas along ridges on the coating surface. The presence of platinum prevented sulfur segregation and void formation at the Al 2 O 3 /NiPtAl interface. As a result, the Al 2 O 3 scale on the NiPtAl coating remained adherent and virtually no spallation was observed even after prolonged cyclic oxidation.

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Section: Medium Refractive Indexmentioning

confidence: 99%

Section: Interference Stacksmentioning

confidence: 99%