What is the difference between JGS1, JGS2 and JGS3 quartz?

JGS1 is synthetic fused silica with high deep-UV transmission (about 185–2500 nm) for UV optics and lasers. JGS2 is flame-fused quartz transmitting roughly 220–2500 nm, a cost-effective choice for UV lamps and sight windows. JGS3 is electrically fused quartz with good infrared transmission up to about 3500 nm.

What temperature can fused quartz tubes withstand?

Transparent fused quartz is typically used continuously up to about 1100 °C and for short periods up to about 1300 °C. Its softening point is around 1730 °C and its very low thermal expansion gives excellent thermal-shock resistance.

Can you manufacture quartz parts from my drawing?

Yes. We cut, drill, slot, grind, polish, bend, weld and seal quartz to customer drawings in PDF, DWG or STEP format, including flanges, multi-bore flow tubes, wafer boats, cuvettes and microplates.

What is the minimum order quantity?

Many standard items and prototypes can be ordered from 1 to 5 pieces. Volume pricing and lead time are confirmed after drawing review.

How is quality controlled?

Every batch is annealed to relieve internal stress, checked on a polarization stress tester, and inspected for dimensions and surface quality before packing. Our factory has passed an onsite assessment by SGS Group.

How are fragile quartz products packed for export?

Parts are individually wrapped, cushioned with foam and shipped in reinforced cartons or wooden cases suitable for air, sea and express freight.

SGS-Verified Quartz Fabricator · Direct Export Routing

China Wholesale Quartz Glass Boat Factory & Exporter in Denpasar

Precision 99.99% SiO₂ fused quartz boats, slotted wafer carriers, and custom thermal silica vessels engineered for high-purity diffusion, oxidation, and thin-film deposition across Denpasar and Indonesian advanced laboratories.

High-Precision Quartz Portfolio

Engineered Fused Quartz Products Available for Denpasar Delivery

Manufactured to optical and semiconductor-grade tolerances, ready for secure crating and direct customs clearance dispatch into Bali and eastern Indonesia.

OPTICAL SHEET BAO RAN 99.99% SiO2 Content Transparent Fused Quartz Sheet

BAO RAN 99.99% SiO2 Content Transparent Fused Quartz Sheet Optical Laser Machinery Insulated Precision Instrument ROHS 200 Mesh

SiO₂ Purity: ≥99.99% RoHS Certified

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JGS1 GRADE JGS1 BAO RAN High Purity Fused Quartz Glass Sheet

JGS1 BAO RAN High Purity Fused Quartz Glass Sheet SiO2 99.99% UV Transparent ROHS Certified 200 Mesh (75m) Laser Plate Annealed

UV Window: 185-2500nm Deep Annealed

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THERMAL TUBE BAO RAN SiO2 Heating Quartz Tube

BAO RAN SiO2 Heating Quartz Tube for Disinfection Cabinets Small Industrial Drying & Cavity Use Coffee Makers Water Dispensers

Thermal Shock Proof IR Transmissive

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PRECISION WAFER BAO RAN 419 Ultra Thin Quartz Sheet

BAO RAN 419 Best Selling 0.1mm 0.2mm 0.3mm 0.4mm 0.5mm Quartz Sheet 99.99% Silica Content SiO2 ROHS Certified 200 Mesh for Laser

Calibrated: 0.1-0.5mm Laser Flatness

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OZONE & UV High Purity Translucent Polished Quartz Glass Tube

High Purity Translucent Polished Quartz Glass Tube Welding Bending Cutting High Ozone Ozone Generator Lab Infrared Heating UV

Plasma Welded Ozone Resistant

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CNC OPTIC JIG High Purity Fused Quartz V Groove Fixture

High Purity Fused Quartz V Groove Fixture Precision Machined Quartz Fiber Array Holder Optical Communication Laser 99.99% Silica

CNC Micron Tolerance Fiber Alignment

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CUSTOM REACTOR 419 Processing High Purity SiO2 Quartz Glass Instrument

419 Processing High Purity SiO2 Quartz Glass Instrument for Laser Machinery Custom Reactor with 99.99% Silica Content

Flanged & Ground Pressure Tested

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DIGESTION TUBE High Purity Transparent Fused Quartz Sheet

High Purity Transparent Fused Quartz Sheet High Light Transmittance Heat Resistance Customizable Digestion Tube ROHS Certified

Acid-Inert Matrix High Temp Annealed

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14,271 m² SGS Assessed Manufacturing Base

≥99.99% SiO₂ Elemental Purity Verified

1,300 °C Thermal Threshold Tolerance

0.02 mm Micro-Slotting Wafer Pitch Accuracy

Engineering Whitepaper & Technical Synthesis

High-Purity Quartz Boats: Structural Physics & Thermal Integrity

A rigorous metallurgical and crystallographic examination of fused silica boats in semiconductor diffusion, photovoltaic wafer processing, and precision chemical calcination.

Fused quartz boats and specialized wafer carriers represent the mechanical backbone of high-temperature thermal diffusion, dry/wet oxidation, low-pressure chemical vapor deposition (LPCVD), and solar silicon cell fabrication. In thermal processing chambers operating between 1,000°C and 1,250°C, ordinary borosilicate or lower-grade aluminosilicate glasses fail immediately due to plastic deformation and phase transformation. Fused silica (amorphous silicon dioxide) features an extraordinarily low coefficient of thermal expansion (CTE) of 5.5 × 10⁻⁷ /°C within the 20°C to 320°C range, granting it an almost absolute immunity to catastrophic thermal shock during rapid wafer insertion and retraction cycles.

Crucial Technical Insight: The longevity of a quartz wafer boat inside diffusion furnaces depends directly on devitrification dynamics. The transformation of metastable amorphous SiO₂ into crystalline beta-cristobalite accelerates rapidly above 1,150°C in the presence of alkali metal contamination (Na, K, Li). Our Lianyungang facility maintains rigorous acid-pickling chemical protocols to guarantee total alkali contaminants remain strictly below 1.5 ppm, preventing phase transition fracturing and premature structural sagging.

Lattice Purity & Trace Metal Depletion

By employing four-stage concentrated hydrofluoric (HF) and hydrochloric (HCl) leaching on pulverized raw silica crystals, transition metal elements like iron (Fe < 0.2 ppm) and copper (Cu < 0.05 ppm) are thoroughly eliminated. This prevents catastrophic wafer-lattice contamination during boron and phosphorus thermal doping sequences.

CNC Diamond Slotting & Pitch Precision

Each boat rail is cut using 5-axis computer numerical control (CNC) cold diamond grinding stations. Wafer slot widths (from 0.38 mm to 1.20 mm) are machined to a tolerance of ±0.015 mm, ensuring identical pitch distribution, parallel seating, zero wafer scuffing, and uncompromised laminar gas dynamics inside high-vacuum furnace liners.

Hydroxyl (OH⁻) Equilibrium & Viscosity

Synthetic silica materials high in hydroxyl groups exhibit degraded high-temperature viscosity and a depressed softening point. Our electric and flame vacuum thermal fusion processes calibrate OH⁻ content to under 20 ppm, elevating the quartz strain point to 1,075°C and the annealing point to 1,215°C for maximum resistance against thermal warpage.

Regional Industrial Synergy

Localized Applications of Fused Quartz in Denpasar & Eastern Indonesia

Bridging Chinese direct manufacturing excellence with the accelerating technical, clean-energy, and scientific laboratories emerging across Bali and surrounding islands.

While internationally renowned as the cultural and tourism capital of Indonesia, Denpasar has evolved into a strategic operational center for the Bali Clean Energy Roadmap, marine environmental analytics, clean-tech prototyping, and higher-education research initiatives spearheaded by Udayana University (UNUD) and regional research institutes. Simultaneously, Denpasar’s maritime logistics network via Benoa Port and rapid air-cargo handling at I Gusti Ngurah Rai International Airport (DPS) make it the primary supply pipeline for specialized scientific apparatus deployed across Eastern Indonesia, including solar testing stations in Nusa Tenggara and analytical testing labs in East Java.

Solar PV & Clean Energy Cell Sintering

Under Indonesia's National Energy General Plan (RUEN), distributed solar projects across Bali and East Indonesia rely on specialized testing rigs. High-purity quartz boats are deployed in sample sintering, silicon cell metallization trials, and perovskite-silicon tandem cell calcination where zero iron-metal diffusion is an absolute requirement.

University Research & Material Analysis

Laboratories in Denpasar and Jimbaran conduct advanced research into semiconductor physics, marine corrosion mitigation, and environmental spectroscopy. Our JGS1 UV optical windows and precision-machined quartz digestion vessels allow unimpeded deep-UV radiation down to 185 nm, resisting aggressive nitric and perchloric acid digests.

Ozone Water Purification & Coastal Desalination

Bali's high-end hospitality and eco-tech industrial operations demand heavy ozone-based water sanitization and UV-C sterilization to eliminate coastal contaminants. Lovri’s translucent and clear fused quartz generator tubes deliver optimal dielectric properties while resisting continuous plasma discharge without solarization degradation.

Comparative Material Physics

Fused Quartz Grade Performance Benchmarks

A reference engineering matrix comparing synthetic, optical, and thermal quartz grades utilized in semiconductor boats, carrier plates, and reactor chambers.

Property Parameter	JGS1 (Synthetic Silica)	JGS2 (Optical Flame-Fused)	JGS3 (Electric Fused / Thermal)	Opaque Fused Silica
Primary Transmission Spectrum	185 nm – 2,500 nm (Deep UV)	220 nm – 2,500 nm (UV-Vis)	260 nm – 3,500 nm (Vis-IR)	Diffuse IR Reflective / Scattering
SiO₂ Purity Ratio	≥ 99.999% (5N5)	≥ 99.99% (4N)	≥ 99.99% (4N)	≥ 99.95% (3N5)
Softening Point (°C)	≈ 1,600 °C	≈ 1,710 °C	≈ 1,730 °C	≈ 1,680 °C
Continuous Max Heat Temp	1,000 °C	1,100 °C	1,150 °C (Short-term 1,300 °C)	1,050 °C
Hydroxyl (OH⁻) Content	< 1,000 ppm (Hydrated Synthetic)	< 150 - 200 ppm	< 10 - 20 ppm (Ultra-Low)	< 50 ppm
Typical Engineering Application	Excimer laser optics, lithography	Sight glasses, UV sterilization	Semiconductor boats, furnace tubes	IR heater coils, furnace heat shields

Direct Factory Control

Why International Procurement Directs to Lovri Quartz

Integrated manufacturing superiority rooted in China’s premier silica cluster, verified on-site by SGS Group for transparent international procurement.

Lianyungang Cluster Control

Situated in Tuofeng Industrial Park, our plant leverages direct access to superior natural silica reserves, maintaining batch-to-batch chemical stability at source price structures.

In-House Stress Annealing

Every welded quartz boat undergoes digital polarization stress inspection following furnace annealing at 1,215°C, eliminating residual shear forces before international transport.

Bespoke Multi-Format CNC

Complete execution of customer CAD drawings (STEP/DWG/PDF), including double-flanged CVD cylinders, ladder boats, micro-bore multi-lumen capillary tubes, and threaded joints.

Zero-Breakage Export Crating

Multi-layered PE vacuum wrap, custom shock-absorbing closed-cell EPE foam cavities, and ISPM-15 compliant heat-treated plywood crates engineered for tropical sea and air freight.

Procurement Intelligence

Denpasar B2B Procurement FAQ: Technical, Customs & Logistics

Addressing the exact transactional and regulatory queries faced by buyers importing quartz glassware and semiconductor consumables into Indonesia.

What Harmonized System (HS) codes govern fused quartz boats, and how is customs duty assessed in Indonesia?

Fused quartz glass products—including semiconductor wafer boats, reactor tubes, and optical silica sheets—are internationally classified under HS Code 7017.10.00 (Laboratory, hygienic or pharmaceutical glassware, whether or not graduated or calibrated, of fused quartz or other fused silica). In Indonesia, import tariffs typically incur an import duty (Bea Masuk) between 0% and 5% under the ACFTA (ASEAN-China Free Trade Area) preferential tariff scheme via Form E, plus value-added tax (PPN 11%). Lovri furnishes official Form E certificates of origin to enable complete duty exemptions for registered Indonesian corporate importers.

How does Denpasar’s tropical humidity and coastal atmosphere affect stored fused quartz ware?

Denpasar’s ambient relative humidity (regularly exceeding 75–85%) and coastal marine airborne salinity present no risk to the chemical matrix of vitreous SiO₂, as fused quartz is entirely impervious to saline oxidation. However, surface condensation can attract environmental dust particles containing alkali trace salts (NaCl, KCl). When an uncleaned boat is introduced directly into a 1,100°C furnace, surface alkali acts as a flux that initiates devitrification nucleation sites. We recommend Indonesian facilities store unpackaged quartz ware in dry nitrogen cabinets or perform a brief 5% HF dip followed by ultra-pure deionized (DI) water ultrasonic rinsing before initial furnace bake-out.

What is the standard air freight routing and transit timeline for fragile quartz products to Denpasar?

For urgent prototypes or rapid replacement furnace boats, express air shipments depart via Shanghai (PVG) directly to I Gusti Ngurah Rai International Airport (DPS) in Denpasar or via transit through Jakarta (CGK). Typical door-to-door air freight transit times range from 4 to 7 business days, including customs inspection. Ocean freight shipments intended for larger installations or bulk tubing are consolidated via Benoa Port (Denpasar) or Surabaya (Tanjung Perak Port) with an average sailing transit time of 12 to 18 days from Chinese main ports.

What minimum order quantity (MOQ) applies to fully customized wafer boats built to technical drawings?

Lovri operates flexible manufacturing schedules specifically designed to support pilot programs, laboratory research, and scale-up manufacturing. Custom-machined quartz boats, specialized carrier jigs, and slotted ladder designs carry an MOQ of just 1 piece. For standard quartz tubes, rods, and optical plates, prototypes are supported with full dimensional CMM inspection reports before proceeding to volume runs.

How does your factory ensure zero breakage during international courier and maritime transfer?

Fragile quartz apparatus is protected using our certified five-stage packaging protocol: First, internal high-purity air-cleaning; second, vacuum static-dissipative film sealing; third, custom-cut high-density EPE foam contoured precisely around fragile tabs and slot rails; fourth, reinforced inner shock boxes; and fifth, outer fumigated multi-wall wooden shipping crates lined with waterproof membrane. Every export consignment is insured under CIF terms, and our historical ocean/air shipping damage rate remains strictly below 0.3%.

Ready to Engineer or Procure Custom Quartz Boats?

Submit your CAD drawings (.STEP, .DWG), dimensional sketches, or operating furnace temperature parameters. Our technical engineering desk will analyze manufacturability and deliver a competitive direct-factory quotation with complete logistical clearance to Denpasar.