China Top Quartz Glass Tubing Manufacturer & Supplier

JGS1 represents synthetic fused silica, formed from silicon chemical precursors. It contains virtually zero metal impurities and provides uninhibited optical transmission in the deep ultraviolet band (185 nm – 2500 nm), making it critical for UV laser optics, excimer lithography windows, and spectrophotometry. JGS2 is electrically or flame-fused natural quartz offering robust transmittance from the near-UV through the visible spectrum (220 nm – 2500 nm), serving as the cost-effective industry workhorse for semiconductor tubing, furnace carriers, and lamp jackets. JGS3 is vacuum-fused electric quartz engineered specifically for optical transparency spanning the visible and deep infrared wavelengths (260 nm – 3500 nm), completely devoid of the OH⁻ hydroxyl absorption dip at 2730 nm, ideal for IR heating elements and infrared observation ports.

Our high-purity clear quartz tubing has a softening point of approximately 1730 °C, an annealing point of 1215 °C, and a strain point of 1120 °C. In industrial continuous-duty environments (such as semiconductor oxidation or tube furnaces), the safe working threshold is approximately 1100 °C to 1150 °C. Under peak, short-duration operating conditions or inert atmospheric purges, the tubing reliably withstands intermittent exposure up to 1300 °C – 1400 °C. Exposure beyond 1150 °C in atmospheric air containing moisture or surface alkali contaminants can accelerate devitrification (crystallization back into cristobalite), making surface cleanliness paramount.

Fused quartz possesses extraordinary chemical inertness across virtually all organic compounds, halogens, neutral salts, and mineral acids (including aggressive boiling Aqua Regia, Nitric Acid, Hydrochloric Acid, and Sulfuric Acid). The only significant substances capable of chemically etching fused quartz at room temperature are Hydrofluoric Acid (HF) and concentrated Phosphoric Acid (H₃PO₄) when elevated above 150 °C. Alkaline solutions and basic metal hydroxides (such as NaOH or KOH) will gradually etch quartz at elevated temperatures, which necessitates selecting pure fused silica and running lower operating temperatures in alkaline chemical stripping processes.

Yes. Lovri Quartz maintains a dedicated engineering team specializing in translating mechanical CAD drawings (DWG, DXF, PDF) and 3D solid models (STEP, IGES) into finished glass apparatus. Our processing portfolio encompasses high-precision diamond core drilling, computer-controlled CNC slotting, threaded inner/outer borings, fire polishing, manual glass lathe welding, custom-formed flanged ground joints, vacuum evacuation tips, and calibrated multi-bore cross sections. Every drawing submitted undergoes Design for Manufacturability (DFM) verification prior to cutting.

Quality documentation is embedded into our production lifecycle. We can provide standard Factory Acceptance Inspection Reports (FAIR), laser-calibrated coordinate measuring machine (CMM) outer/inner diameter and wall concentricity inspection logs, spectrophotometer spectral transmission curves, and polarization optical stress polariscope certifications. Onsite material verification is reinforced by SGS Group factory audit credentials, RoHS heavy metal screening records, and batch chemical assay certificates upon procurement contract agreement.

Every precision quartz item is cleaned, sealed in dust-free PE bags, and suspended inside individualized high-density expanded polyethylene (EPE) closed-cell shock absorbing foam compartments. Secondary packing utilizes rigid corrugated inner boxes reinforced inside heavy-duty, international ISPM-15 compliant export fumigation-free plywood crates. Shipments traveling via air, express courier (DHL/FedEx/UPS), or ocean freight are palletized, strapped, edge-protected, and labeled with high-visibility fragility and shock-warning indicators, achieving a historical transit safety rating exceeding 99.8%.