Graded-index antireflective coatings for glass. Final report, September 1978-February 1982
Glass compositions and process conditions by which broad band graded-index antireflective films can be produced on glass surfaces have been developed. The end use for the treated glass sheet is as cover plates for flat plate solar-thermal collectors; thus, cost issues dictated that the process conditions fall within constraints imposed by the float glass process. To accomplish this objective, both the film formation process and the characteristics of the graded-index films were investigated in detail. A model borosilicate glass was used for initial work that served to verify experimental procedures, to confirm essential features of the film forming process and to determine whether the porous surface film and the phase separated structure of the host glass had an adverse effect on mechanical properties. Glasses and film surfaces were characterized chemically (atomic absorption, Auger and SIMS), microstructurally (SEM, TEM and replica microscopy), by weight loss, by specific surface area (BET), by small angle x-ray scattering (SAXS) and optically. Based on the results with the borosilicate glass, a candidate soda-lime-silica glass composition was defined that satisfied the phase separation and float glass process criteria. Heat treatments were defined for the glass that produced appropriate microstructures and selective etchants were defined that produced porous films by selective dissolution.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge (USA). Energy Lab.
- DOE Contract Number:
- AC02-78ER05003
- OSTI ID:
- 5246643
- Report Number(s):
- DOE/ER/05003-016; MIT-EL-82-016; ON: DE82016756
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
Similar Records
Monolithic graded-refractive-index glass-based antireflective coatings. Broadband/omnidirectional light harvesting and self-cleaning characteristics
Development of porous antireflective films on soda-lime-silica glass
Related Subjects
ANTIREFLECTION COATINGS
CHEMICAL COMPOSITION
DEPOSITION
MICROSTRUCTURE
GLASS
BOROSILICATE GLASS
CALCIUM OXIDES
COVERINGS
ETCHING
EXPERIMENTAL DATA
FATIGUE
FLAT PLATE COLLECTORS
HEPTANE
REFLECTIVITY
SILICA
SODIUM OXIDES
TESTING
WEIGHT
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
CALCIUM COMPOUNDS
CHALCOGENIDES
COATINGS
CRYSTAL STRUCTURE
DATA
EQUIPMENT
HYDROCARBONS
INFORMATION
MECHANICAL PROPERTIES
MINERALS
NUMERICAL DATA
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SOLAR COLLECTORS
SOLAR EQUIPMENT
SURFACE FINISHING
SURFACE PROPERTIES
141000* - Solar Collectors & Concentrators