Touch-Down Technology Co., Ltd - Touch-Down is a professional fine ceramics manufacturer.

Quartz (SiO₂) Applied to Ceramic Product And Components | Over 30 Years Advanced Ceramic Parts & Components Manufacturer | Touch-Down Technology Co., Ltd

Touch-Down is a precision Silicon Carbide, Aluminium Oxide, Zirconium Oxide, 995 Aluminium Oxide, 997 Aluminium Oxide, Precision Ceramics, Advanced Ceramics, Structural Ceramics, Precision Ceramic Parts, Machinable Ceramics manufacturer from Taiwan since 1997. Touch-Down is a compact, high-precision ceramic part manufacturer, who is specialized in the manufacture of fine ceramics / advanced ceramics / special ceramics integrating production and sales from raw material preparation, molding, plane grinding, abrasive machining of inner and outer diameters to digital processing of NC drilling crew. Over the past two decades, it has provided products and services for parts manufacturing and processing of fine ceramics, aluminium oxide, zirconium oxide, quartz and silicon carbide in terms of semiconductor processing, LED processing, TFT / LCD processing, solar chip processing, machinery production, medical and pharmaceutical industry and national defense and military.

Quartz (SiO₂) Applied to Ceramic Product | Fine Ceramic Components for Science, Space and Semiconductor Industries | Touch-Down Technology Co., Ltd

Semiconductor Quartz / Touch-Down is a compact, high-precision ceramic part manufacturer, who is specialized in the manufacture of fine ceramics / advanced ceramics / special ceramics integrating production and sales from raw material preparation, molding, plane grinding, abrasive machining of inner and outer diameters to digital processing of NC drilling crew.

Semiconductor Quartz

Quartz (SiO₂) Applied to Ceramic Product

Quartz is a kind of glass like its name but what makes it different is that ordinary glass consists of many components, while quartz only consists of SiO₂. Because quartz contains very little amount of metallic impurities, only up to 10ppm (one hundred thousandth), the minimum state is usually only 10ppb (one over a billion) or less and because of its high purity, the quartz itself presents characteristics and advantages that other glass can not present.

Quartz (SiO₂) material features extremely low thermal expansion coefficient, high temperature resistance, high abrasion resistance, good chemical stability, electrical insulation, low and stable retardation, near ultraviolet (infrared) ray visible light transmittance, high mechanical properties and so on.

Therefore, high-purity quartz materials are widely used in modern electronic technology, semiconductor, telecommunications, electric light source, solar energy, national defense high-precision measuring instruments, laboratory physics and chemistry instruments, nuclear energy, nano-industries.

Semiconductor Applications
In the manufacturing process of semiconductor, the main quartz materials are used for quartz tube furnace, quartz boat, quartz ring, quartz tank, windows, process equipment and other related quartz components.
Quartz processing include: surface grinding, polishing, cylinder cutting, cutting, groove processing, curve processing, special-shaped processing, ultra-fine hole drilling, film coating.

Characteristics Of Quartz

1. Easy Light Penetration
The easy light penetration of quartz not only applies to visible light. The wavelength light ranges from ultraviolet to infrared light also present good penetration.
2. High Purity
As it's only composed of SiO₂, it contains only trace amounts of metal impurities.
3. Heat Resistance
With softening point of about 1700°C, it can be used at a high temperature of 1000°C. The thermal expansion coefficient is small, which can withstand dramatic temperature changes.
4. Drug Erosion Resistance
It features quite stable chemical properties with excellent chemical resistance.

Quartz Material Characteristics Table
1. Material impurity content analysis (SIO₂ content: ≥ 99.995%)
Fe Mg Mn K Li Co Ni Cu Na B Ti Ca Al
1.2 0.4 0.1 2.0 0.5 < 0.02 0.03 0.57 2.3 0.8 0.1 0.8 16
2. Optical Test: Refractive index and dispersion values (na = 1.45845)
Category 20°C UV IR Visible light
Na value 1.4586 ± 4 x 10-4 1.5341 - 1.4942 1.4251 - 1.47451 1.4698 - 1.45413
Mean dispersion and dispersion coefficient / Nf-Nc=0.00674 ±3 x 10-4 / Dispersion coefficient Y= 680
3. Thermal Test
Thermal Expansion Coefficient Temperature °C 100 300 500 700 900 1100
Thermal Expansion Coefficient x 10-7 5.11 5.92 5.65 5.73 5.52 5.48
Heat Conduction W/m°C Temperature °C 20 100 200 300 400 950
Heat Conduction Coefficient 1.38 1.47 1.55 1.67 1.84 2.68
Thermal Energy Rate J/Kg°C Temperature °C 20 100 500 900
Thermal Energy Rate 690 772 964 1052
4. Electricity Test
Electricity Performance Dielectric Constant (E) 20°C 23°C 28°C
3.7 3.77 3.81
(Tgδ) 1 kHz 1-1000 MHz 3 x 10-4MHz
0.0005 0.0001 0.0004
Resistivity Factor
(Ω cm)		 20°C 400°C 800°C 1200°C
1016 1010 6.3 x 106 1.3 x 105
5. Reaction of Material and Oxide
AIO₃ MgO CaO ZnO Fe-Oxide CuO BaO Basic-Oxide PbO
> 1200°C > 950°C > 1000°C > 800°C > 950°C > 950°C > 900°C > 800°C Melting state
6. Mechanical Properties
Density 2.21 g/cm³ Compression strength 6000N/mm²
160000psi		 Extension strength 50 N/mm² Torque force 30 N/mm²
Mohs Hardness 5.5 - 6.5 N/mm² Torque coefficient 3.1 x 104 N/mm² Bending withstanding 67 N/mm² Sound velocity 5720m x s
7. Temperature Changes

Strain point: 1000 - 1125°C
Long-term use: below 1100°C
Annealing point: 1180°C
Short-term use: 1450°C
Softening point: 1600 - 1710°C
Melting: 1730°C

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