Translucent Quartz Tube

Made of high-quality silica has a milky white appearance, acid resistance, high temperature resistance, and other properties due to the inherent tiny bubbles in its structure.

*Far infrared baking

*High temperature thermocouple applications

*High temperature electric furnace heating

*Industrial drying/heating applications

*Such as: heaters, disinfection cabinets, microwave ovens, electric ovens, fish tanks, etc.

High-quality silica powder, with a purity of more than 99.95%, is selected to make silica glass

Silica glass is often used for high-temperature sintering, and its stability at high temperatures is particularly important. Because it contains a small amount of OH (oxygen hydrogen) and may release a small amount of gas, such as hydrogen, it is divided into many special grades to provide various uses.

The average expansion coefficient of silica glass is much lower than that of other types of glass and crystal. It is only about 17% of ceramic and hard glass, and 5% to 8% of ordinary glass. Therefore, it has extremely high heat resistance and rapid cooling after heating. Maintain stable performance.

The specific heat of silica glass is 890~1140J/kg.k (20℃~1000℃), and the general glass is 920~1200J/kg.k. The thermal conductivity is 1.3w/mk at 0℃ and 115w/mk at 100℃, which is lower than crystal. 10%. In comparison, silica glass and quartz glass have almost the same specific heat and slightly lower thermal conductivity.

Silica glass has almost similar characteristics to quartz glass, but because it is born with a micro-bubble structure, it has a lower electromagnetic damage capability.

The mechanical properties of silica glass are very different from those of metal materials. Its elastic modulus, bending strength and breaking strength will increase with the increase of temperature and at high temperatures of 900℃~1000℃. Silica glass products are made of high-quality silicon Therefore, its heat resistance and viscosity are particularly good. It can be used at a temperature of 1100°C for a long time or 1300°C for a short time. When the temperature is higher, it may become skewed.

Silica glass raw material has excellent acid resistance. This fact can be immediately proved in concentrated acid at high temperature. In fact, due to its high chemical stability, these products are 30 times more acid-resistant than ceramic enamel and 150 times more resistant than nickel alloy or ceramic. However, corrosion will occur if used in hydrofluoric acid (HF) or hot concentrated phosphoric acid (H3P04) above 300°C.

The opalescent quartz tube itself can absorb the infrared spectrum with wavelengths below 4u, causing the sheet itself to heat up and increase the thermal energy radiation. At the same time, the emissivity in the 5--13u far-infrared band is more than 90%, which is suitable for dry materials that need to be heated (generally in 3--25u region has strong absorption) provides the most efficient selective absorption heating element material. This performance is not available in other infrared materials. Quartz sheets made of quartz are produced in stable sizes and have many excellent parameters.

Subject                                                       Performance

Maximum operating temperature               1100℃ (continuously)

                                                                   1300℃ (short time)

                                                                  1650℃ (rapid cooling)

Proportion                                                  2.15×103ｋｇ／ｍ3

Expansion                                                  0.54×10-6per℃

Dielectric strength                                      2×1014Ω－ｍ（ａｔ 20℃），2×105Ω－ｍ（ａｔ 800℃）

Pressure resistance (5mmt)                       10KV/mm(ａｔ 20℃)，2～3KV/mm(ａｔ 500℃)

Thermal conductivity                                  0.0033cal/cm・sec・℃

Purity                                                         99.95％ＳｉＯ２

Resistance to chemicals                            Except for hydrofluoric acid and hot phosphoric acid, any         

                                                                   other acid or even aqua regia has almost no corrosion on     

                                                                   opalescent glass.

                                                                   Alkali and salt resistance is also better than ordinary glass

Size (mm)   OD(mm)    W.t.(mm)    Length(mm)    Sliding Max(mm)    Bow Max(mm)    Oval Max(mm)

 7-15              ±0.20          ±10%        ± 1.0                  10%                      1.5%                       2‰ 

15-20             ±0.15          ±10%        ± 1.0                  15%                      1.5%                       2‰ 

20-25             ±0.1.5         ±10%        ± 1.0                  15%                      1.5%                       2‰

25-35             ±0.20          ±10%        ± 1.0                  15%                      1.5%                       2.5‰

35-50             ±0.20          ±10%。     ±1.0                   15%                     1.5%                       2.5‰