Outstanding Thermal Stability:
Near-zero thermal expansion coefficient (0.54×10⁻⁶ /°C), resisting thermal shock and deformation
Superior Chemical Resistance:
Inert to most acids, alkalis, and organic solvents, ideal for corrosive environments
Thermal Conductivity:
Low, enabling efficient heat transfer
Maximum Service Temperature:
1100°C for short time, long time working temperature up to 1000°C
Purity:
99.9% high-purity fused silica, ensuring minimal impurity interference
Hardness:
5.3-6.5 on Mohs Scale, providing superior scratch resistance
A milky quartz plate (or sheet) is a type of fused quartz characterized by its opaque, white, and milky appearance. Unlike clear quartz, which is transparent, milky quartz has a distinctive diffuse, semi-translucent quality that creates a soft, uniform glow when illuminated from behind.
1.1 Appearance:
Opaque & Milky White:It has a smooth, uniform, white surface that is not transparent.
Excellent Diffuse Transmission:Its primary function is to evenly scatter and diffuse light, eliminating hot spots and creating a soft, pleasing illumination. It acts as a natural light diffuser.
1.2 Thermal & Mechanical Properties (inherited from quartz):
High Temperature Resistance: Withstands extreme temperatures (up to 1100°C) without degrading.
Excellent Thermal Shock Resistance: Can endure rapid heating and cooling without cracking.
High Mechanical Strength: Hard and rigid, offering good durability.
High Purity & Chemical Stability: Resistant to water and most acids, making it chemically inert and stable.
1.3 Manufacturing Process:
The milky appearance is primarily achieved through one of two methods:
Controlled Bubble Formation: Countless microscopic air bubbles are intentionally introduced during the melting and fusion process of high-purity silica. These tiny bubbles scatter incident light in all directions, causing the opaque, white appearance.
Sintering: In some cases, it can be made by sintering high-purity quartz crystals, which also creates a dense but light-diffusing structure.
2. Advantages of Milky Quartz Plates:
Superior Light Diffusion: Creates uniform, soft, and glare-free illumination.
High Temperature & Thermal Shock Resistance: Ideal for use in heaters, furnaces, and high-temperature lighting.
Mechanical Strength: More durable and long-lasting than many alternative diffusers.
Chemical Inertness: Resists corrosion and is easy to clean, suitable for harsh environments.
Efficient Infrared Transmission: Allows radiant heat to pass through effectively while diffusing light.
Electrical Insulation: Provides a safe barrier for electrical heating components.
In summary, the milky quartz plate is a high-performance material that uniquely combines the superior thermal and mechanical properties of quartz with an exceptional ability to diffuse light. This makes it indispensable for high-temperature heating and lighting applications where both safety and visual comfort are paramount.
3.Products core advantage
3.1 Superior Light Diffusion and Soft Illumination
This is their primary advantage. The myriad of microscopic bubbles within the material scatters light intensely, eliminating harsh glares and hot spots. It produces a uniform, soft, and eye-pleasing illumination, ideal for creating comfortable lighting environments.
3.2 High Temperature and Thermal Shock Resistance
Like all fused quartz, milky quartz plates can withstand extreme temperatures (typically up to 1100°C) without melting, deforming, or degrading. Their very low coefficient of thermal expansion grants them exceptional resistance to thermal shock, allowing them to survive rapid heating and cooling cycles without cracking.
3.3 High Mechanical Strength and Durability
They are hard, rigid, and possess high mechanical strength. This makes them more durable and resistant to physical impact or mechanical stress compared to many other diffuser materials like frosted glass or plastics, especially in industrial settings.
3.4 Excellent Chemical Inertness and Purity
They are highly resistant to water and most acids (except hydrofluoric and hot phosphoric acid). This chemical stability prevents contamination, making them suitable for use in clean and corrosive environments without corroding or leaching impurities.
3.5 Effective Infrared Transmitter
While excellent at diffusing visible light, milky quartz readily transmits infrared (radiant heat) energy. This crucial property makes it the perfect choice for covers on electric heaters, stoves, and industrial heating systems, as it allows heat to pass through efficiently while providing a safe, insulated barrier.
3.6 Electrical Insulation
It is an excellent electrical insulator, even at high temperatures. This is a critical safety feature when used as a cover for heating elements, preventing electrical shorts and protecting users.
4. Common Applications:
Milky quartz plates are predominantly used in applications requiring uniform, diffused light and high-temperature resistance.
4.1 Heating Elements:
Widely used as protective covers or sheaths for infrared heaters, ceramic heating elements, and in household appliances like electric stoves and toasters. It safely allows infrared heat to pass through while providing electrical insulation.
4.2 Lighting:
Used as diffuser panels in LED lights, oven lamps, and other high-temperature lighting fixtures to create even, glare-free illumination.
4.3 Observation Windows:
In industrial furnaces or high-temperature equipment where a clear view is not necessary, but a protected window is needed to monitor processes (e.g., to see if heating elements are on).
4.4 Semiconductor Industry:
Used in some diffusion and annealing furnace components where precise light transmission is not critical, but high purity and temperature resistance are.
Technical specifications
|
性能内容 Property Content |
性能指标 Property Index |
|
密度 Density |
1.9-2.0 g/cm3 |
|
抗拉硬度 Tensile Strength |
4.9×107 Pa(N/m2) |
|
抗压硬度 Compression Strength |
>1.0×109 Pa |
|
热膨胀系数 (20℃-300℃) Coefficient of Thermal Expansion |
5.4×10−7 cm/cm℃ |
|
热导率 (20℃) Thermal Conductivity |
low |
|
比热 (20℃) Specific Heat |
650J/kg℃ |
|
软化点 Softening Point |
1600℃ |
|
退火点 Annealing Point |
1100℃ |
Development History
Patents and certification
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