Quartz, particularly in its fused form, does have a high melting point. This is due to its composition primarily of silica (SiO2), which is a major component of the Earth's crust and is known for its high melting and softening temperatures.
Explanation:
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Composition and Melting Point: Quartz is primarily composed of silica (SiO2). The melting point of pure silica is approximately 1610 degrees Celsius (2910 degrees Fahrenheit). This high melting point allows quartz to withstand elevated temperatures, making it suitable for various high-temperature applications, such as in semiconductor manufacturing and as protective coverings in harsh environments.
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Thermal Properties: The text mentions that fused quartz has a low degree of thermal expansion and high resistance to thermal shocks. These properties are directly related to its high melting point. The ability to withstand rapid temperature changes without breaking or deforming is crucial in many industrial processes.
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Applications: The high melting point of quartz is exploited in several industries. For instance, in semiconductor manufacturing, the high purity and thermal resistance of quartz are essential for processes that involve high temperatures. Quartz tubes, which can withstand up to 1100 degrees Celsius, are used in various applications including heat treatments and as components in cleaning baths post-etching and machining.
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Resistance to Corrosion and Irradiation: The high melting point of quartz also contributes to its resistance to corrosion and irradiation. These properties make quartz valuable in environments where materials are exposed to chemicals or radiation, further expanding its industrial applications.
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Electrical Properties: While the text contrasts the electrical properties of glass and quartz, noting that quartz is a better conductor of electricity, this property is also indirectly influenced by its high melting point. The structural integrity and purity maintained at high temperatures allow quartz to perform well as an electrical conductor in various industrial products.
In summary, the high melting point of quartz, primarily due to its silica composition, makes it a material of choice for numerous high-temperature applications across various industries. Its thermal stability, resistance to thermal shock, and other physical properties are all enhanced by its ability to withstand high temperatures without degradation.
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