JGS2 quartz glass is a high-performance optical material with excellent UV visible near-infrared transmittance, high chemical stability, low thermal expansion coefficient, and good high temperature resistance. Due to its unique physical and chemical properties, JGS2 quartz glass is widely used in scientific research experiments in fields such as optics, semiconductors, laser technology, and spectroscopic analysis.

2. Basic characteristics of JGS2 quartz glass

JGS2 quartz glass (Jena Glass Standard 2) is an artificial quartz glass made of high-purity silicon dioxide (SiO ₂), characterized by:

2.1 Optical Performance

-High transmittance: It has excellent transmittance in the ultraviolet (200-350 nm), visible light (350-800 nm), and near-infrared (800-2500 nm) bands, especially in the ultraviolet band.

-Low absorption rate: The impurity content is extremely low (especially the OH ⁻ content is low), reducing light absorption and scattering.

2.2 Thermal Properties

-The low thermal expansion coefficient (5.5 × 10 ⁻⁷/℃) enables it to maintain dimensional stability even in high temperature environments.

-High temperature resistance: It can work for a long time above 1000 ℃ and withstand high temperatures of 1450 ℃ in the short term.

2.3 Chemical stability

-Acid and alkali resistant (except hydrofluoric acid and hot phosphoric acid), suitable for corrosive environments.

-Excellent radiation resistance, suitable for high-energy physics experiments.

2.4 Mechanical Properties

-High hardness (Mohs hardness 7), good wear resistance, but high brittleness, mechanical impact should be avoided.

3. Application of JGS2 quartz glass in scientific research experiments

Due to its excellent performance, JGS2 quartz glass plays an important role in multiple scientific research fields.

3.1 Applications in Optical Experiments

(1) UV optical system

-JGS2 quartz glass has extremely high transmittance in the ultraviolet band (200-350 nm) and is commonly used for:

-UV laser window plate (such as the fourth harmonic output of excimer laser and Nd: YAG laser).

-Prism and lens of UV spectrometer, used for high-precision UV spectral analysis.

-UV lithography technology is used as a mask and optical component in semiconductor manufacturing.

(2) Laser technology

-Used as a laser resonant cavity lens, laser beam expander, and laser protection window due to its high damage threshold (able to withstand high-power laser irradiation).

-In femtosecond laser experiments, the low nonlinear refractive index of JGS2 quartz glass can reduce beam distortion.

(3) Interferometer and spectrometer

-As a splitter plate of Michelson interferometer, it has high optical uniformity and low birefringence characteristics.

-Optical window for Fourier Transform Infrared Spectrometer (FTIR) to ensure high signal-to-noise ratio.

3.2 Semiconductor and Microelectronics Research

(1) Wafer Processing and Photolithography

-In semiconductor manufacturing, JGS2 quartz glass is used for:

-The optical system of the lithography machine is suitable for deep ultraviolet (DUV) and extreme ultraviolet (EUV) lithography due to its high UV transmittance.

-Wafer carrier, high temperature resistant and does not react with silicon wafers.

(2) CVD and PVD equipment

-Used as observation windows and reaction chambers in chemical vapor deposition (CVD) and physical vapor deposition (PVD) equipment due to their high temperature resistance and corrosion resistance.

3.3 High Energy Physics and Nuclear Technology

(1) Particle detector

-The radiation window used for Cherenkov radiation detectors, due to its high transparency and resistance to radiation damage.

-Used as an X-ray monochromator and beamline window in synchrotron radiation sources.

(2) Nuclear fusion experiment

-Used as a laser injection window and plasma diagnostic window in Tokamak and inertial confinement fusion (ICF) experiments.

3.4 Research in Chemistry and Materials Science

(1) Observation of High Temperature Reaction

-Used as an observation window in high-temperature furnaces and chemical reactors, it can monitor high-temperature reaction processes (such as crystal growth and high-temperature synthesis) in real time.

(2) Corrosive environment experiment

-Optical monitoring systems used in strong acid (such as concentrated sulfuric acid, nitric acid) or strong alkaline environments due to their excellent corrosion resistance.

3.5 Biological and Medical Research

(1) UV sterilization equipment

-In the biological laboratory, it is used as a protective window for ultraviolet sterilization lamps to ensure efficient sterilization while avoiding material degradation.

(2) Fluorescence microscope

-As a filter for fluorescence excitation light source, its high ultraviolet transmittance can improve the sensitivity of fluorescence detection.

4. Processing and treatment of JGS2 quartz glass

4.1 Precision machining requirements

-Polishing: Ultra precision polishing is required to reduce surface scattering, Ra＜1 nm。

-Coating: Anti reflective film (AR film) or reflective film (such as aluminum or gold film) can be coated to optimize optical performance.

4.2 Precautions for use

-Avoid mechanical impact and prevent brittle fracture.

-Use a dust-free cloth and alcohol during cleaning to avoid scratching with hard objects.

JGS2 quartz glass has a wide range of applications in scientific research experiments such as optics, semiconductors, high-energy physics, chemistry, and biomedical fields due to its excellent UV transparency, high temperature resistance, and chemical stability.

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