High Purity Quartz Spiral Tube for Heat Resistance & Light Transmission is a spiral shaped shaped quartz glass pipe made of high-purity silicon dioxide melted at high temperature and precisely bent into shape. It combines excellent optical transparency, extremely low thermal expansion coefficient, and outstanding high-temperature heat resistance, and can work stably for a long time in environments above 1200 ℃. This product is widely used in semiconductor diffusion processes, photovoltaic CVD equipment, ultraviolet photocatalytic reactors, laboratory gas condensation recovery, and chemical heat exchange systems. With its unique spiral structure design, it can significantly extend the fluid path or increase the optical path within a limited space, making it an ideal choice for high temperature, corrosive, and optically demanding scenarios.

FAQ: Frequently Asked Questions for Users

Q1: What is the maximum temperature resistance of heat-resistant and transparent high-purity quartz spiral tube?  

A: The long-term use temperature of this product can reach 1200 ℃, and the short-term temperature resistance can reach 1300-1350 ℃. The specific temperature resistance performance depends on the hydroxyl content and wall thickness design of the quartz material. We can provide low hydroxyl (≤ 8ppm) products to further enhance high temperature resistance and crystallization resistance.

Q2: What is the transmittance of the spiral tube?  

A: In the ultraviolet to near-infrared band (200-2500nm), the transmittance is usually ≥ 90%. For deep ultraviolet (254nm, etc.) sterilization or photocatalytic applications, higher purity synthetic quartz materials can be selected, with a transmittance of over 92%.

Q3: Does it support customized non-standard sizes? Is there a limit on the minimum inner diameter and number of spiral turns?  

A: Support full customization. The outer diameter range of the tube is 4mm-80mm, the inner diameter is 2mm-70mm, and the number of spiral turns is 1-30. The spiral diameter and pitch can be processed according to the drawing. A micro spiral tube with a minimum outer diameter of 3mm can be achieved.

Q4: Is the quartz spiral tube easily damaged? How to ensure transportation?  

A: Quartz glass is a brittle material and should be avoided from severe impact. We use independent pearl cotton lining and thickened cardboard/wooden box packaging, and can also choose built-in shock-absorbing brackets. For export orders, provide reinforced packaging that meets sea/air freight standards.

Q5: Can it be used in strong acid or strong alkali environments?  

A: Except for hydrofluoric acid (HF) and hot phosphoric acid, quartz has excellent corrosion resistance to the vast majority of acid, alkali, and salt solutions, making it an ideal choice to replace metal and plastic pipes.

What core needs can the product address for users?

-Requirement 1: Structural stability under high temperature conditions → Avoid softening, deformation, and rupture of ordinary glass or plastic pipes at high temperatures.  

-Requirement 2: Light efficiency loss of optical system → High transmittance reduces energy attenuation and improves UV reaction or detection efficiency.  

-Requirement 3: Long path requirements in limited space → Spiral structure achieves the longest fluid or optical path with the minimum volume, optimizing equipment design.  

-Requirement 4: Impurity contamination risk → High purity quartz (SiO ₂ ≥ 99.995%) does not release metal ions, ensuring high cleanliness scenarios such as semiconductors, pharmaceuticals, and laboratories.  

-Requirement 5: High cost of frequent replacement and maintenance → Excellent thermal shock stability and corrosion resistance, significantly extending service life.

Core advantages and application value of the product

1. Material advantages - high purity, heat resistance, and transparency

-Purity: SiO ₂ content ≥ 99%, total amount of metal impurities<20ppm.  

-Hydroxyl control: can be customized to 8-15ppm (low hydroxyl) or above 150ppm (high hydroxyl, for specific infrared transmission).  

-Thermal performance: The coefficient of thermal expansion is only 5.5 × 10 ⁻⁷/℃, and it has excellent thermal shock resistance (1100 ℃ → room temperature water quenching without cracking).  

-Optical performance: 200nm transmittance>85%, 2500nm transmittance>90%.

2. Structural advantage - the engineering value brought by the spiral shape

-Volume efficiency: At the same length, the space occupied by a spiral tube is only 1/5 to 1/10 of that of a straight tube.  

-Heat/mass transfer enhancement: Spiral flow channels generate secondary flow and turbulence effects, which can increase the heat transfer coefficient by 30% -50%.  

-Optical path doubling: When used in ultraviolet reactors, the optical path can be increased by 3-8 times under the same outer diameter size.

3. Customization capability - covering all key dimensions and forms

We provide genuine manufacturing according to drawings, with no minimum order quantity limit, and support for single piece sampling and bulk delivery. Customizable parameters include:

Outer diameter (OD): 3mm – 100mm

Inner diameter (ID): 1.5mm – 90mm

Wall thickness: 0.8mm -5mm

Spiral diameter (center distance): 15mm -300mm

Pitch: 5mm -200mm

Number of laps: 1-50 laps

End forms: straight mouth, horn mouth, flanged, ground mouth, flange connection

Typical application scenarios and problem solving

Scenario 1: Preheating and mixing of reaction gases in semiconductor vapor deposition (CVD) equipment

Original problem: The straight tube preheater occupies a large space in the furnace body, resulting in uneven gas mixing and poor film uniformity.  

Solution: Customized OD20 × ID16mm, 5-turn spiral tube, installed between the furnace door and the reaction chamber. Gas forms turbulence in the spiral channel, reducing the standard deviation of temperature distribution by 42% and reducing the non-uniformity of film thickness from ± 8% to ± 2.3%.

Scenario 2: Light path enhancement in UV Ozone cleaning machine

Original problem: The UV light utilization rate of straight quartz tubes is low, and the cleaning time can last up to 15 minutes.  

Solution: Adopting OD12mm spiral tube with mirror polished inner wall, 254nm ultraviolet light reflects and refracts multiple times in the spiral cavity, increasing the light intensity density by 2.7 times, shortening the cleaning time to 5 minutes, and significantly improving the cleaning consistency.

Scenario 3: Laboratory exhaust gas condensation recovery device

Original problem: Glass condenser tubes are fragile and cannot directly treat high-temperature organic waste gases.  

Solution: Use OD10 × ID6mm, 8-turn quartz spiral tube as the condensing core, introduce 5 ℃ cooling liquid, and the high boiling point solvent vapor at the inlet of 150 ℃ can be condensed and recovered by the spiral tube with a recovery rate of 94%. It can run continuously for 6000 hours without corrosion or blockage.

Scenario 4: Continuous flow heat exchange in chemical microreactors

Original problem: The corrosion resistance of stainless steel coils is insufficient, and the reaction process cannot be observed.  

Solution: The high transparency quartz spiral tube jacket design, with inner and outer double helices, serves as both a reaction channel and a heat exchanger, achieving in-situ optical monitoring and rapid temperature control, and increasing reaction selectivity by 18%.

Customer application case (anonymous real case)

Case A (Semiconductor Equipment Manufacturer - Japan)

-Requirement: Spiral tube with a diameter of 2 inches or less, used for small CVD chambers, requiring an inner wall roughness Ra<0.8 μ m and resistance to rapid cooling and heating.  

-Delivery plan: OD8 × ID6mm, 5 circles, flame polished inner and outer walls.  

-Result: After 300 rapid cooling tests from 1300 ℃ to 25 ℃, there were no cracks or particle detachment.

Case B (Environmental Instrument Enterprise - Germany)

-Requirement: Integrated quartz spiral tube with an outer diameter of 30mm and a length of 350mm, used for high-temperature flue gas analysis pretreatment unit, required to be resistant to acid mist corrosion.  

-Delivery plan: OD30 × ID24mm, spiral diameter 110mm, pitch 22mm, 60mm straight pipe sections at both ends.

-Result: After installation, the instrument failure rate decreased by 76%.

Case C (University Laboratory)

-Requirement: Capillary spiral tube for microchannel photocatalytic reactor, inner diameter 2mm, 20 turns, UV transmittance ≥ 88%.  

-Delivery plan: Using high-purity quartz substrate, flame bending forming, and laser ranging every circle to ensure pitch error<0.2mm.

-Result: Three sets of different sizes were customized for amplification experiments.

If you are looking for high-performance quartz spiral tubes that can meet the requirements of high temperature, transparency, corrosion resistance, and compact layout at the same time, whether it is standard size or complex shaped customization, please feel free to contact us at any time. You can provide drawings, usage scenarios, or target parameters, and we will provide you with a technical feasibility assessment and quotation plan. Support customization, global shipping, samples and batches of the same quality.

Consult now to get your exclusive solution for heat-resistant and transparent high-purity quartz spiral tubes.

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.