Chromite powder  has the following advantages as a glass colorant, combining its physical and chemical properties and industrial application requirements:
1. Strong high-temperature stability
Chromite powder shows excellent stability in the high-temperature environment of glass melting (usually 1200-1500℃), and is not easy to decompose or volatilize. This ensures color uniformity and avoids color difference or fading caused by high temperature.
2. Unique and controllable color effects
The chromium element (Cr³⁺) gives glass a hue ranging from yellow-green to dark green, and the color depth can be precisely controlled by adjusting the addition amount (usually 0.1%-5%). Compared with traditional colorants such as iron oxide, chromite powder has a more vivid color and is suitable for the production of high-end products such as decorative glass and wine bottles.
3. Low cost and easy to obtain raw materials
As a natural mineral, chromite powder has a simple processing process (crushing → grinding → screening) and is cheaper than artificial colorants such as synthetic chromium oxide. This is crucial for cost control in large-scale industrial production.
4. Environmental protection and resource utilization advantages
The chromium in chromite powder exists in trivalent form (Cr³⁺), which is less toxic than hexavalent chromium (Cr⁶⁺) and more in line with environmental protection requirements. In addition, its natural properties reduce dependence on chemical synthetic materials, which is in line with the trend of green manufacturing.
5. Compatibility and functional expansion
Chromite powder has good compatibility with other glass raw materials (such as quartz sand and soda ash) and will not significantly affect the chemical stability or mechanical strength of the glass. At the same time, chromium can also enhance the ultraviolet absorption capacity of glass and extend the shelf life of the contents (such as alcohol).

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