Featured Fused Quartz & Precision Silica Components
Direct-from-factory high-purity quartz products customized for optical, photovoltaic, laser, and thermal processing facilities across Semarang, Kendal, and Demak industrial corridors.
Wholesaler Customized High Quality Clear Fused Quartz Glass Sheet Custom Used in Optics and Photovoltaics
The Factory Produces High-purity Fused Quartz Round Rods, Offering Cutting, Welding, and Bending Services
The Factory Produces High-purity Fused Silica Bottom Sealing Tubes with an Diameter of 20-25mm Cutting and Welding Services
Graphene Quartz Heating Tube
Customizable High Purity Fused Quartz Glass Tube High Temperature Resistant
Fused Transparent Quartz Tube
Factory Customized High-purity Quartz Glass Petri Dishes with Lids, for Laboratory, Medical Equipment, Etc.
Optical Quartz Glass Plate: Material Science, Thermal Mechanics & CE Quality Validation
An authoritative engineering analysis for procurement officers, process metallurgists, and optoelectronic researchers operating in Central Java's high-technology manufacturing clusters.
1. Silica Polymorphs and Synthesis Pathways
Optical quartz glass represents the pinnacle of amorphous silica engineering. Unlike standard borosilicate, soda-lime, or aluminosilicate formulations, fused quartz is synthesized through the thermal fusion of naturally occurring crystalline silicon dioxide (SiO₂) of exceptional chemical purity (≥99.99%), or through vapor-phase chemical vapor deposition (CVD) of silicon tetrachloride (SiCl₄) yielding synthetic fused silica. The structural matrix consists of a random network of corner-sharing SiO₄ tetrahedra, devoid of crystalline grain boundaries. This lack of periodic lattice prevents internal light scattering and grain boundary corrosion, giving optical quartz plates near-zero thermal expansion (5.5 × 10⁻⁷ /°C from 20°C to 320°C) and remarkable broadband optical transmission spanning the vacuum ultraviolet (VUV) to the mid-infrared (MIR).
In precision optical engineering, material selection dictates the operational limits of sight windows, beam splitters, laser debris shields, and semiconductor wafer stages. The manufacturing processes governed by Donghai County Nivra Quartz Products Co., Ltd. strictly delineate between three primary synthetic and natural fused silica classifications:
| Grade | Material Type | Transmission Window | OH⁻ Hydroxyl Content | Typical Industrial Applications in Semarang |
|---|---|---|---|---|
| JGS1 | Synthetic Fused Silica (CVD) | 185 nm – 2,500 nm (Deep UV to Vis) | < 5 ppm (High OH options > 1200 ppm) | Semiconductor lithography, excimer laser optics, spectrometer entrance windows |
| JGS2 | Fused Natural Crystal Quartz (Oxyhydrogen Flame) | 220 nm – 2,500 nm (Near UV to Vis) | 150 – 200 ppm | High-temperature sight glasses, solar simulator optical filters, furnace inspection ports |
| JGS3 | Electric Vacuum Fused Quartz | 260 nm – 3,500 nm (Vis to Mid-IR) | < 5 ppm (Anhydrous IR Grade) | Infrared thermal pyrometry windows, CO₂ laser processing optics, petrochemical IR sensors |
2. Thermodynamic Stability and Thermal Shock Mechanics
Optical quartz plates possess an extremely high transformation temperature compared to commercial glasses. With an annealing point of 1,180°C, a strain point of 1,070°C, and a softening temperature of 1,683°C, our quartz plates sustain continuous operational temperatures of 1,100°C and short-duration thermal excursions up to 1,450°C. The exceptionally low coefficient of linear thermal expansion (α = 5.5 × 10⁻⁷ /°C) yields an ultra-high thermal shock resistance parameter. A 100mm × 100mm × 5mm polished optical quartz plate can be heated to 1,000°C in an induction furnace and quenched instantly into 20°C water without mechanical fracture or micro-crack propagation.
This thermal resilience is vital for high-temperature reactors located in Kendal Industrial Park and Wijayakusuma Industrial Estate, where process visibility must be maintained under cyclic heating cycles without the catastrophic failure risks associated with borosilicate glass.
3. CE Certification & Compliance Verification for Indonesian Imports
Global original equipment manufacturers (OEMs) and Indonesian state-mandated facilities demand thorough certification verifying mechanical stability, safety, and elemental purity. Nivra Quartz guarantees CE compliance through adherence to harmonized international testing frameworks:
- EN 61010-1:2010: Safety requirements for electrical equipment for measurement, control, and laboratory use. Quartz components utilized as pressure barriers or dielectric windows satisfy rigorous mechanical burst-pressure and thermal isolation benchmarks.
- RoHS Directive (EU) 2015/863 & REACH (EC 1907/2006): Independent inductively coupled plasma mass spectrometry (ICP-MS) tests confirm total heavy metal concentrations (Pb, Cd, Hg, Cr⁶⁺, PBBs, PBDEs) are strictly non-detectable or < 0.1 ppm, safeguarding cleanroom applications.
- DIN 58927 & ISO 10110 Surface Standards: Optical plates are classified according to scratch-dig ratings (MIL-PRF-13830B: 20/10 for laser-grade, 40/20 for analytical optical, 60/40 for sight glasses), guaranteeing micro-scratch exclusion and zero inclusion-induced beam distortion.
Semarang as the Epicenter of Central Java's Advanced Manufacturing Corridor
Evaluating operational integration, supply chains, and optical quartz plate consumption across Kendal SEZ, Wijayakusuma, and Tanjung Emas logistics nodes.
Solar PV & Clean Energy at Kendal SEZ
Kendal Special Economic Zone (SEZ), directly connected via the Trans-Java toll network to Semarang, is rapidly emerging as Indonesia's prime hub for solar photovoltaic panel fabrication and new energy equipment. Our clear fused quartz sheets serve as high-transmittance cover plates for solar simulators (AM 1.5G spectral matching), plasma-enhanced chemical vapor deposition (PECVD) substrate carriers, and high-temperature vacuum diffusion furnace sight-glasses.
Semiconductor Packaging & Electronics in KIW
Kawasan Industri Wijayakusuma (KIW) hosts precision electronics assembly, PCB wave-soldering, and optoelectronic packaging plants. CE certified JGS1 optical quartz plates function as ultraviolet lithography exposure masks, UV-curing conveyor windows, and dielectric insulation barriers due to quartz's low dielectric constant (ε = 3.75 at 1 MHz) and exceptional breakdown voltage (>30 kV/mm).
Chemical Processing & Petrochemical R&D
Across Central Java's chemical corridors, process engineers deal with highly corrosive media including boiling concentrated hydrochloric (HCl), nitric (HNO₃), and sulfuric (H₂SO₄) acids. Optical quartz plates withstand all organic and mineral acids (excluding hydrofluoric and hot phosphoric acids above 300°C), making them indispensable for sight-flow indicators, autoclave observation windows, and reaction calorimeter sight covers.
Academic & Institutional Analytics (UNDIP & BRIN)
Semarang is an educational and analytical epicenter anchored by Universitas Diponegoro (UNDIP) and regional branches of the National Research and Innovation Agency (BRIN). Analytical laboratories require precision JGS1 fused silica spectrophotometer windows, quartz microscope slides, and fluorescence cuvettes requiring zero autofluorescence under UV laser excitation (266 nm and 355 nm).
Industrial Automation & Machine Vision Inspection
High-speed food processing, packaging, and textile machinery in the Semarang-Demak industrial belt increasingly integrate automated optical inspection (AOI) and multi-spectral machine vision cameras. Ordinary acrylic or polycarbonate scratch shields degrade under ambient heat and cleaning solvents; our fire-polished and optically coated quartz plates safeguard high-resolution image sensors without inducing optical distortion or chromatic aberrations.
Comprehensive Optical Quartz Glass Mechanical & Physical Matrix
Empirical parameters calibrated according to ASTM, DIN, and ISO optical metrology standards.
| Physical / Mechanical Property | SI Metric Value | Engineering Significance for Semarang Plants |
|---|---|---|
| Density (ρ) | 2.20 ± 0.01 g/cm³ | Lightweight structural load for precision motorized optical stages |
| Coefficient of Thermal Expansion (CTE, 20–300°C) | 5.5 × 10⁻⁷ K⁻¹ | Zero focal plane drift in laser optical setups under ambient tropical heat |
| Thermal Conductivity (20°C) | 1.4 W/(m·K) | Uniform localized thermal distribution; eliminates thermal lensing |
| Refractive Index (n_d @ 587.6 nm) | 1.4585 | Consistent beam steering calculations in refraction-critical instruments |
| Abbe Number (V_d) | 67.8 | Extremely low chromatic dispersion across ultraviolet and visible light |
| Young's Modulus of Elasticity (E) | 7.2 × 10⁴ MPa (72 GPa) | High mechanical stiffness preventing deformation under vacuum pressure |
| Poisson's Ratio (ν) | 0.17 | Predictable transverse strain for finite element stress modeling |
| Mohs Hardness / Vickers Hardness | 5.5 – 6.5 Mohs / 8.8 GPa | High abrasion and scratch resistance against abrasive particulate wear |
| Compressive Strength | 1,150 MPa | Resists high hydrostatic loads in pressurized industrial viewports |
| Tensile Strength (Design Limit) | 48 MPa | Safe pressure threshold design parameter for explosive fluid barriers |
Engineered Export Logistics & Port Tanjung Emas Customs Facilitation
Overcoming tropical maritime humidity, mechanical shock, and customs tariffs for Central Java procurement departments.
1. Sea Freight Optimization via Port Tanjung Emas (IDSRG)
Exporting brittle, high-value optical quartz glass plates from our Donghai facility to Semarang requires specialized supply chain protocols. Cargo originating at Lianyungang or Qingdao port is routed via direct or single-transshipment container services directly to Pelabuhan Tanjung Emas (Semarang, Central Java). Transit times typically average 12 to 18 days, significantly lower than offloading in Tanjung Priok (Jakarta) and trucking over congested North Coast Java (Pantura) highway routes, thereby eliminating highway vibration damage.
2. Tropical Moisture Barrier & Dynamic Cushion Packaging
Central Java's coastal climate features relative humidity levels consistently exceeding 85% with ambient temperatures hovering between 28°C and 34°C. Standard wooden crates risk moisture condensation ("glass sweat"), which can cause optical glass surfaces to develop alkaline staining and micro-haze through surface ion exchange. Nivra Quartz executes an engineered 5-stage packaging protocol:
- Class 10,000 Cleanroom Pre-Wash: Quartz plates undergo multi-stage ultrasonic degreasing in high-resistivity deionized water followed by hot forced filtered air drying.
- Surface Interleaving: Individual plates are layered with acid-free, non-linting, optical separation paper or protective low-tack electrostatic PE films to prevent contact scratching.
- Hermetic Vacuum Heat-Sealing: Product stacks are sealed inside multi-layer aluminum-poly composite moisture-barrier foil bags with calculated bentonite clay desiccants to keep internal humidity below 15% RH during transit.
- Shock Absorption Matrix: Heavy-density high-resilience EVA foam inserts line the interior of export-grade wooden cases, preventing resonance frequencies from transferring to the quartz plates during maritime swells.
- ISPM-15 Fumigation Compliant Crating: Heavy solid-plywood composite crates require no chemical fumigation upon arrival at Indonesian customs checkpoints, ensuring rapid clearance.
3. Tariff Codes (HS Code) & Form E Preferential Trade
Indonesian importers benefit directly from the ASEAN-China Free Trade Agreement (ACFTA). By furnishing authentic Form E (Certificate of Origin) documents issued by China customs authorities alongside commercial invoices, packing lists, and CE certificates, Indonesian buyers can reduce import duties from standard rates down to 0% - 5% under Indonesian Harmonized System (HS) classifications:
- HS Code 7002.31.00: Fused quartz or other fused silica in tubes, unworked or worked.
- HS Code 7002.39.00 / 7006.00.00: Fused quartz plates, discs, and sheets, optical grade, ground and polished for laboratory and industrial instruments.
Why Central Java Enterprises Partner with Donghai County Nivra Quartz
Combining raw crystal material abundance with world-class optical CNC fabrication and reliable export infrastructure.
Geographic Raw Material Purity
Located in Donghai County, Jiangsu—the globally recognized "Capital of Crystal"—Nivra Quartz utilizes uncompromised native high-purity natural silica sand. This raw material purity guarantees minimal bubble density (DIN 58927 Class 0), near-zero particulate contamination, and exceptional structural consistency across high-volume production batches.
5-Hour Engineering Feedback SLA
Our in-house technical engineering team reviews customer CAD/DWG drawings, tolerancing requirements, and application environments with an average response time of under 5 hours. We assist plant engineers in Semarang with manufacturability optimization (DFM) to avoid over-tolerancing costs and prevent thermal mismatch.
Precision Sub-Micron Cold Processing
Our workshop accommodates complex multi-axis CNC contour milling, micro-hole laser core drilling, step machining, high-accuracy bevel chamfering, and chemical-mechanical double-sided planetary polishing. We achieve dimensional tolerances down to ±0.02 mm and surface roughness Ra < 0.5 nm for critical optical surfaces.
Stringent Metrology & Quality Rigor
Every shipment is accompanied by a comprehensive Certificate of Analysis (COA), Zygo laser interferometric flatness test maps, UV-Vis-NIR spectrophotometer transmission curves, and strict dimensional verification reports. Defective parts never exit the cleanroom packaging bay.
Frequently Asked Questions for Sourcing Quartz Plates in Semarang
In-depth technical, commercial, and logistical clarifications for plant managers, purchasing departments, and laboratory directors in Central Java.
How do I determine whether my Semarang facility requires JGS1, JGS2, or JGS3 optical quartz?
What is the typical shipping lead time and customs clearance process for Semarang via Port Tanjung Emas?
How does high humidity in Central Java affect optical quartz plates during transit and storage?
What surface tolerances and flatness specifications can Nivra Quartz achieve for laser and vacuum systems?
Can Nivra Quartz produce custom circular, stepped, and perforated quartz plates from engineering drawings?
What is the minimum order quantity (MOQ) and sample evaluation policy for Indonesian industrial buyers?
Accelerate Your Optical Quartz Sourcing for Semarang Operations
Consult with our quartz materials engineers today. Receive comprehensive technical feasibility feedback, dimensional verification, and direct-from-factory quotes within 5 hours.
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