As an established manufacturer based in Donghai County, Donghai County Nivra Quartz Products Co., Ltd. specializes in the custom fabrication of high-purity fused quartz lighting glassware. With an ultra-low coefficient of thermal expansion, extreme thermal shock resistance up to 1100°C continuous working temperatures, and exceptional optical transmission ranging from deep UV (185 nm) through infrared (3500 nm), our quartz components are engineered for stringent industrial, analytical, and commercial lighting environments.
We supply custom single-ended, double-ended, spiral, and domed fused silica envelopes tailored for ultraviolet germicidal lamps, infrared halogen heaters, pulsed xenon lamps, high-pressure mercury discharge sources, and photochemistry reactor jackets.
Ozone-free or ozone-generating fused silica sleeves for water treatment, ballast protection, and air sterilization systems.
Clear, frosted, ruby red, or gold-coated twin-tube and single-tube quartz envelopes engineered for rapid thermal response and uniform heat distribution.
Thick-walled, high-burst pressure fused silica bulb bodies for xenon, mercury, and metal-halide stage and analytical lighting.
Our direct control over cold mechanical processing, hot torch flame working, and annealing relieves all internal stresses, ensuring optical clarity and long working life without devitrification under intense arc discharges.
| Parameter | Synthetic Silica (JGS1 Grade) | Natural Fused Quartz (JGS2 Grade) | Dehydroxylated Quartz (JGS3 / Low-OH) |
|---|---|---|---|
| Transmission Range | 185 nm – 2500 nm (Deep UV) | 220 nm – 2500 nm (Standard Optical) | 260 nm – 3500 nm (IR Optimal) |
| Hydroxyl (OH) Content | ≤ 1200 ppm | ≤ 150 – 200 ppm | ≤ 5 ppm (Prevents IR absorption) |
| Softening Point | 1730 °C | 1683 °C | 1680 °C |
| Primary Lighting Usage | Germicidal UV-C, Excimer Lasers | UV Curing, Halogen Lamps, Sleeves | Infrared Heaters, Semiconductor IR Emitters |