Precision Quartz Glass Capillary Tubes
Precision Quartz Glass Capillary is a miniature glass tube used in laboratories and scientific research, possessing the characteristics of quartz glass, good chemical stability, heat resistance, and optical transparency. It typically has a smaller diameter and longer length, and is commonly used for micro liquid operations and scientific research in laboratories.
There are different shapes of outer diameter available for customer’s option:
Round, Square, Rectangular, D-shape, Elliptical, Hexagonal, Octagon, Conical, etc.
There are different shapes of bores available for customer’s option:
Round bore, Square bore, Rectangular bore, double bore, multi-bore, D-shape bore, etc.
There are different glass materials available for customer’s option:
High purity silica glass, fused quartz glass, doped quartz glass, borosilicate glass, multicomponent glass etc.
Inventory of Round Quartz Glass Capillary Tubes
POS
|
OD (mm)
|
ID (mm)
|
1
|
0.96
|
0.55
|
2
|
0.99
|
0.55
|
3
|
1
|
0.2
|
4
|
1
|
0.55
|
5
|
1
|
0.6
|
6
|
1.17
|
0.67
|
7
|
1.2
|
1
|
8
|
1.2
|
0.65
|
9
|
1.41
|
1.16
|
10
|
1.75
|
0.4
|
11
|
1.98
|
0.15
|
12
|
2
|
1.5
|
13
|
2
|
0.405
|
14
|
2
|
0.638
|
15
|
2.9
|
2
|
16
|
3
|
1.2
|
17
|
3
|
2.1
|
18
|
3.5
|
2.69
|
19
|
4
|
0.5
|
20
|
4
|
1.5
|
21
|
4
|
1.25
|
22
|
5.5
|
0.5
|
23
|
...
|
...
|
*For other dimensions, please contact our customer service.
There are two main methods for manufacturing quartz glass capillary tubes:
Drawing method: This method involves heating a quartz glass rod or tube to its melting point and then rapidly stretching it to form a slender capillary tube. During the drawing process, temperature and stretching speed need to be controlled to obtain the desired diameter and length.
Cone pulling method: This method is to form a conical hole at one end of a quartz glass rod or tube, and then expand and extend the conical hole by stretching, ultimately forming a capillary tube. The cone pulling method can prepare capillaries with different diameters, which is suitable for some special experimental needs.
Some key factors to consider when manufacturing quartz glass capillaries include the purity of the material, melting temperature, speed and control of drawing or tapering, as well as subsequent surface treatment and cleaning steps. These factors have a significant impact on the quality and performance of capillaries and need to be strictly controlled to meet experimental requirements. The following requirements should be noted when preparing quartz glass capillary tubes:
1) Material selection: Select high-purity quartz glass as the raw material to ensure that the prepared capillary has good chemical stability and heat resistance.
2) Melting preparation: Quartz glass capillaries are usually made by melting and drawing quartz glass rods or tubes. During the preparation process, it is necessary to control the temperature and drawing speed to ensure that the diameter and length of the capillary tube meet the requirements.
3) Surface treatment: The prepared capillary tube needs to undergo surface treatment, usually acid washing or other chemical methods, to remove impurities and residues on the surface and make it smooth.
4) Dimensional accuracy: The diameter and length of capillaries usually require a certain degree of accuracy, especially in microfluidic experiments, where dimensional accuracy has a significant impact on experimental results.
5) Cleaning and drying: The prepared capillary tube needs to undergo sufficient cleaning and drying treatment to ensure that there are no pollutants and residual moisture on the surface, and to avoid interference with the experimental results.
Overall, the preparation of quartz glass capillaries requires strict control over material selection, preparation processes, and post-processing steps to ensure that the quality and performance of the capillaries meet experimental requirements.
The application of Quartz Glass Capillary Tubes
1. Application of Quartz Capillary Tube In Optical Fiber And Communication
In optical fiber and communication industry, Quartz Glass Capillary Tubes are widely used as PLC Splitter, Wavelength Division Multiplexer (WDM), Fiber Optic Sensor (FOS), Fiber Optic Sensors, Optical Fiber Communication Systems and other optical fiber transmission facilities.
2. The Application of Quartz Capillary in Physics
In physics experiments, quartz capillaries are commonly used to measure the surface tension and viscosity coefficient of liquids. By observing the rise or fall of the liquid in the capillary under gravity, these physical parameters can be calculated. In addition, quartz capillaries are also used to study the properties of complex fluids such as liquid crystals.
3. Application of Quartz Capillary Tube in Chemical Analysis
In the field of chemical analysis, quartz capillaries are often used as part of the sampler to accurately deliver extremely small volumes of liquid samples into analytical instruments such as mass spectrometers or spectrometers. Its high-precision volume control capability ensures the accuracy of the analysis results.
4. Application of Quartz Capillary Tube in Materials Science
In materials science, quartz capillaries can be used to manufacture micro - and nano scale devices and structures. For example, nanowires and other one-dimensional materials prepared by quartz capillary method are of great significance for studying their electrical, optical, and mechanical properties.
5. Application of Quartz Capillary Tube in Biotechnology
In the field of biotechnology, quartz capillaries can be used for processing and analyzing biological samples such as blood, cell culture media, etc. Its excellent chemical stability and harmless properties to biological samples make quartz capillaries a commonly used tool in biochemical experiments.
6. Application of Quartz Capillary Tube in Environmental Science
In environmental science, quartz capillary tubes can be used to monitor and analyze pollutants in water bodies and the atmosphere. For example, a certain volume of water or gas sample can be collected through a quartz capillary tube and then subjected to subsequent chemical analysis.
Quartz capillary tubes plays an indispensable role in scientific research and industrial production due to its unique properties and wide applicability. Whether it is precise physical measurements or complex chemical analysis, quartz capillary tubes have demonstrated their irreplaceable importance. With the development of technology, the application fields of quartz capillary will be further expanded.
Material Properties of Quartz Glass
The outstanding advantage of silica glass lies in its unique comprehensive properties that other materials do not have, including very low thermal conductivity, excellent thermal vibration resistance, very high deformation and softening temperatures, very low thermal conductivity, very low dielectric loss, and good optical transmittance over a wide spectral range from ultraviolet to infrared.
The mechanical properties of quartz glass
Density
|
2.2g/cm3
|
Compressive strength
|
1100Mpa
|
Bending strength
|
67Mpa
|
Tensile strength
|
48Mpa
|
Poisson's ratio
|
0.14-0.17
|
Young's modulus
|
72000Mpa
|
Stiffness modulus
|
31000Mpa
|
Mohs hardness
|
5.5-6.5
|
Thermal properties of quartz glass
Deformation point
|
1120℃
|
Softening point
|
1680℃
|
Annealing point
|
1210℃
|
Specific heat (20-350℃)
|
670J/kg.℃
|
Thermal conductivity (20℃)
|
1.4W/m.℃
|
Thermal expansion coefficient
|
5.5x10-7cm/cm.℃
|
Hot working temperature
|
1700-2000℃
|
Short term usage temperature
|
1300℃
|
Long term use temperature
|
1100℃
|
Electrical properties of quartz glass
Resistivity
|
7x107Ω.cm
|
Insulation strength
|
250-400Kv/cm
|
Dielectric constant Ɛ
|
3.7-3.9
|
Dielectric absorption coefficient
|
<4x104
|
Dielectric loss coefficient
|
<1x104
|
Optical properties of quartz glass
