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<title>Structural properties of sodium-iron phosphate glasses</title>

1994; SPIE; Volume: 2287; Linguagem: Inglês

10.1117/12.190949

1996-756X

Guomei Wang, Yuan Wang, Baohui Jin,

Pigment Synthesis and Properties

The affects of iron on the structure, physical, and optical properties of several iron phosphate and sodium-iron phosphate glasses were investigated using x-ray photoelectron spectroscopy (XPS), Mossbauer spectroscopy, and infrared spectroscopy (IR). Archimedes method, differential scanning colorimeter and Able refractometer measurements were used to determine the glass density (d), transition temperature (T g ), and refractive index (n), respectively. XPS and Mossbauer spectra showed the presence of iron in both the Fe 2+ and Fe 3+ (4- and 6-coordinated) states. With the increase of Fe 2 O 3 content in the iron phosphate glasses and the increase of Na 2 O content in the sodium-iron phosphate glasses, the Fe 2+ /Fe ratio decreases and the Fe 3+ (4-coordinated)/Fe ratio increases. The infrared measurements showed that the increase in the Fe 2 O 3 content or the Na 2 O content caused a change in coordination from FeO 6 to FeO 4 . Finally, the relationship between the properties and the Fe 2+ Fe 3+ (4-coordination) ratio is discussed briefly.