Transparent cylindrical quartz crucible

Transparent cylindrical quartz crucible is a special container made by precision high-temperature melting high-purity quartz glass. With its excellent optical transmittance, outstanding thermal shock resistance, and extremely low coefficient of expansion, this product can maintain high stability in extreme high temperatures and complex chemical environments. Its standardized cylindrical shape optimizes heating uniformity and is an indispensable core consumable in the fields of semiconductor single crystal growth, photovoltaic crystal pulling, and high-end material research, perfectly adapting to various harsh high-temperature melting scenarios.

FAQ Frequently Asked Questions

Q1: What is the maximum temperature tolerance of your transparent quartz crucible?

A: Under normal atmosphere, our quartz crucible can be used stably at 1150 ℃ for a long time, with a maximum temperature tolerance of 1250 ℃ to 1400 ℃ in a short period of time (depending on the specific thickness and heating rate).

Q2: Can the purity index of the crucible meet the requirements of semiconductor grade?

A: Absolutely possible. We offer optical grade and semiconductor grade options, with SiO2 purity of 99.999% (5N) or higher, and extremely low levels of trace metal impurities such as aluminum, iron, and potassium (<1 ppm), effectively preventing secondary pollution at high temperatures.

Q3: Does it support customized non-standard sizes? How about the delivery date?

A: As the source manufacturer, we provide comprehensive customized services. Whether you need extreme calibers, special wall thicknesses (such as bottom thickening, sidewall gradient thickness), or specific chamfer R-angles, they can be customized according to drawings or samples. Conventional customized parts will be shipped within 7-15 days, and complex specifications will depend on process evaluation.

Core needs and challenges solved for you

Starting from the practical application of users, this transparent cylindrical quartz crucible mainly solves the following problems for you: eliminating the risk of explosion during high-temperature melting process (excellent thermal shock resistance); Eliminate material cross contamination (high purity, no precipitation); Resolve the issue of blind spots in observation (high transparency facilitates real-time monitoring of the internal molten state); And solve the problem of mismatch between standard parts and equipment in the market (100% customized size according to demand).

Core advantages and application value of the product

Ultimate purity guarantee (value): Using high-purity quartz sand and advanced melting technology, it ensures that impurities are not introduced in rare earth smelting and precious metal smelting, improving the yield and purity of the final product.

Excellent thermal shock resistance (value): able to withstand severe temperature fluctuations (such as direct exposure to room temperature without explosion at 1100 ℃), significantly reducing the cost of consumables loss caused by equipment failure or operational errors.

High transmittance and bubble control (value): The bubble level is strictly controlled within the standard to ensure that the external heating system energy penetrates evenly during the single crystal growth process, and the operator can clearly observe the melt liquid level and crystal interface.

Full specification flexible customization (value): Outer diameter (OD) ranges from 10mm to 800mm+, and height (H) can be flexibly matched. Whether it is a small capacity crucible of a few milliliters in the laboratory or an industrial grade large-sized pulling crucible, we can accurately polish it to ensure a perfect fit with your heating furnace and avoid heat loss.

Application scenarios and practical problems solved

Photovoltaic and semiconductor crystal pulling: solves the problem of low carrier lifetime in silicon wafers caused by trace precipitation in traditional crucibles at high temperatures, and improves the single crystal crystallization rate with high uniformity when heated.

Laboratory chemical analysis: solves the corrosion problem in alkaline metal and acid-base alternating environments, replaces glassware, and is resistant to strong acids such as hydrofluoric acid (HF).

Optical glass melting: solves the problem of foreign matter mixing at high temperatures, ensuring that there are no bubbles or stripes inside the optical glass.

Customer application case (a European photovoltaic material research and development center)

Background difficulties:

Last year, we received a request for help from a European photovoltaic material research and development institution client. When they were developing a new precursor material for cadmium telluride thin film solar cells, the standard quartz crucible of a certain brand that was originally used frequently experienced bottom explosion after being heated to 900 ℃ and kept warm for 2 hours, with an explosion rate of up to 30%. This not only leads to the scrapping of expensive experimental materials, but also seriously delays the research and development cycle. In addition, due to the mismatched height of the standard crucible, the temperature measuring thermocouple cannot accurately contact the bottom of the melt, resulting in blind spots in temperature control.

Our solution:

Material upgrade: In response to the specific corrosiveness of its reactants, we have upgraded the quartz raw material to gas refined low hydroxyl quartz glass, which has improved its high-temperature crystallization resistance and corrosion resistance.

Structural customization: Based on the size of the furnace and the position of the thermocouple, we have customized the outer diameter of the crucible to be Φ 85mm and the height to be 120mm. Most importantly, we have customized a small concentric groove with a depth of 5mm and a diameter of 8mm in the center of the bottom of the crucible, specifically designed for precise fixing of the thermocouple.

Process optimization: Local annealing treatment was carried out using a hydrogen oxygen flame, completely eliminating residual stress in the bottom processing area.

Final result:

After delivering the first batch of 50 customized crucibles, the customer conducted 100 consecutive high-intensity high-temperature melting experiments, reducing the explosion rate to an absolute 0%. The customized groove at the bottom has improved the temperature control accuracy by ± 2 ℃, and the uniformity of the new material crystallization has achieved a qualitative leap.

Whether you are looking for industrial grade consumables or have special laboratory non-standard requirements, please feel free to contact us at any time to provide drawings or parameters, and get exclusive customized solutions and sample quotes for transparent cylindrical quartz crucibles!

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.