The appearance of purple tungsten is purple or blue-purple powder, with a density of about 7.78g/cm3, insoluble in water, alcohol and most acids, soluble in lye, and has high chemical activity, large specific surface area, high energy density, Strong reducibility, excellent photoelectric properties and gas sensitivity. It is worth mentioning that the optical properties are mainly manifested in the low transmittance in the visible and ultraviolet spectral ranges, while the high transmittance in the near-infrared spectral range.
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