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A quartz crucible is a container made of quartz glass used to hold and heat materials in laboratories and industries such as microchip and solar cell production. It is durable, heat-resistant, chemically inactive, and can resist expansion and contraction due to temperature changes. The size, shape, and thickness of the crucible can vary depending on its intended use.
A quartz crucible is a cup or bowl-shaped container made of quartz glass. It is used to hold and heat materials in laboratories and in some industrial applications such as the production of silicon wafers for microchips and in the solar cell industry. A quartz crucible can be very small or as large as 3 feet (0.9 m) in diameter. The crucible can also be made from a variety of different quartz glass formulations, depending on the usage.
Glass made of pure crushed quartz is called quartz glass. It is durable and heat resistant and highly desirable as glass for laboratory equipment including beakers, flasks and crucibles. It is also chemically inactive, which is also useful in laboratory settings. A quartz crucible has another property which makes it suitable for heating materials. Resists expansion and contraction due to temperature changes.
Quartz glass is naturally more transparent than ordinary glass. It can be made opaque, however, with some additives, and quartz glass of this type is sometimes used to make crucibles. Opaque quartz glass is usually white or off-white in color, although other colors are possible. A quartz crucible is typically thick-walled and both heavier and stronger than a typical glass beaker, flask, or other laboratory equipment, and often lacks a rolled edge as often found on many other types of laboratory glass. A quartz crucible may have a tight-fitting lid.
In addition to their use in laboratories, quartz crucibles are widely used in the microchip and solar cell industries. The chemical composition of quartz makes containers of this type ideal for creating large silicon wafers of the highest quality and crystalline uniformity. These wafers are used to make microchips and a similar process is used to make solar cells. Quartz crucibles are sometimes used in the refining of some metals because they are able to withstand the high temperatures encountered in the refining process.
A quartz crucible can vary greatly in physical size. They can be very small, containing only a few milliliters, or very large, such as those used in the microchip and refining industries. Even the shapes can vary considerably, depending on the use. A quartz crucible can be cylindrical, tall and narrow, or short, squat and wide. They can be tapered, with straight or curved profile sides. The glass can vary in thickness, depending on its intended use, and can be up to 2 inches (5cm) thick or more.
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