Clear Sapphire Tubes for High-Temperature Optical and Process Assemblies

Clear sapphire tubes are hollow cylindrical components for projects that need a transparent, hard optical barrier or a protected process path. The local product photographs show clear tubular components with machined end faces and central bores; they do not establish a guaranteed grade, temperature rating, pressure rating or dimensional tolerance. Those requirements must be confirmed against the drawing and service conditions.

Product Description

Sapphire is a single-crystal aluminium oxide material often selected when optical transparency, hardness and chemical resistance are important. A tube design adds a bore, wall thickness and end geometry that must be evaluated together with mounting, sealing and thermal loading. Xinkehui reviews the material, geometry and inspection requirements as one quotation package.

Product Applications

• Optical isolation and viewing paths: use a transparent tube where a process or instrument path needs visual access while maintaining a defined boundary. Confirm wavelength range and surface finish for the actual optical path.
• High-temperature fixtures: sapphire may be considered for furnace, heating or laboratory fixtures, but the allowable temperature and thermal-shock behavior must be qualified for the exact geometry.
• Chemical and vacuum process components: assess media compatibility, sealing, pressure, cleanliness and outgassing independently. A photograph is not evidence of a pressure or vacuum rating.
• Research prototypes and custom assemblies: drawing-led dimensions allow the tube to be integrated with holders, spacers, seals and optical components.

Product and Procurement Advantages

1. Transparent sapphire offers an option for hard optical barriers where ordinary glass may not meet the application need.
2. Hollow geometry can be reviewed together with bore, wall, length and end-face requirements.
3. Xinkehui's published company materials describe precision processing and inspection capabilities for semiconductor and optical materials; exact processes and reports require order confirmation.
4. Acceptance criteria can be defined before quotation instead of inferred from a product photograph.

RFQ: 10 Information Items

1. Material and crystal orientation requirement.
2. Outside diameter and inside diameter.
3. Overall length and wall-thickness tolerance.
4. End-face geometry, chamfer or radius.
5. Surface finish and polishing requirement.
6. Optical transmission band, if applicable.
7. Operating temperature and thermal-cycle profile.
8. Chemical, vacuum or pressure environment.
9. Cleanliness, packaging and handling requirements.
10. Inspection method, sampling plan and required report.

Procurement FAQ

1. Is this tube suitable for any temperature? No. Temperature capability depends on geometry, mounting, thermal gradients and the service environment and must be qualified.
2. Can the tube be made to a drawing? Drawing-led enquiries can be reviewed; manufacturability and tolerances require technical confirmation.
3. Is the photograph a dimensional specification? No. Dimensions and tolerances must come from the approved drawing.
4. Can both ends be polished? End finish can be included in the RFQ and confirmed against the required geometry.
5. Can it be used under vacuum? Vacuum suitability requires sealing, cleanliness, outgassing and pressure review; it is not implied by the material name.
6. Can optical transmission be tested? A spectral test may be requested; wavelength range, method and reporting format must be agreed.
7. Are coatings included? No coating is implied. Coating material, band and process must be specified separately.
8. What packaging is available? Packaging and protection should be agreed for the tube geometry and handling risk.
9. Is stock or a fixed delivery date guaranteed? No. Availability and lead time are quotation-specific.
10. What does Xinkehui need for pricing? Send the drawing, quantity, service conditions, inspection requirements and destination so the request can be evaluated.

Specification and Acceptance Checklist

These are enquiry inputs, not guaranteed stock specifications.

Xinkehui Company Capability

Shanghai Xinkehui New Materials Co., Ltd. describes an experienced engineering team, precision processing equipment and testing instruments in its published company profile. This supports drawing-led discussions of non-standard components. Tube-specific processes, inspection methods and acceptance limits must be confirmed for the order.

Related Optical Components

Compare tube geometry with sapphire viewing windows when defining your assembly.