Quartz Crystal Materials | SiO2 Crystal

Data sheet

Density	2.65 g/cm3
Materials	SiO2
Melting Piont	1467 °C

More info

Quartz (SiO2) Crystal Materials are artificially grown single-crystal quartz produced through a hydrothermal synthesis process. The autoclave is filled with water and a mineralizer (NaOH or Na2CO3) to a predetermined level, while a baffle system ensures a stable temperature gradient, maintaining nearly isothermal zones. Thin slices of Z-cut single crystals serve as seeds, allowing controlled crystal growth. These high-purity quartz crystals are essential for frequency control devices, optical components, and scientific research applications. Heeger Materials provides high-quality Quartz Crystal Materials to meet the demands of various industries.

Quartz Crystal Materials | SiO2 Crystal

Quartz Crystal Materials Properties

Density (g/cm³)	2.65
Melting Point (°C)	1467
Thermal Conductivity (W/(m·K)) (T = 25°C)	10.7 (parallel to axis Z), 6.2 (perpendicular to axis Z)
Thermal Coefficient of Linear Expansion (0–25°C, °C⁻¹)	7.1 × 10⁻⁶ (parallel to axis Z), 13.2 × 10⁻⁶ (perpendicular to axis Z)
Hardness (Mohs)	7
Specific Heat Capacity (J/(kg·K)) (T = 25°C)	710
Dielectric Constant (30 MHz)	4.34 (parallel to axis Z), 4.27 (perpendicular to axis Z)
Young's Modulus (E, GPa)	97.2 (parallel to axis Z), 76.5 (perpendicular to axis Z)
Shear Modulus (G, GPa)	31.14
Bulk Modulus (K, GPa)	36.4
Chemical Stability	Insoluble in water
Elastic Coefficients	C₁₁ = 87, C₁₂ = 7, C₄₄ = 58, C₁₃ = 13, C₁₄ = 18, C₃₃ = 106

Quartz Crystal Materials Standard Specifications

Twinning: There shall be no electrical or optical twinning in the usable region.
Strain: There shall be no strain contained both inside and surface of the seed crystal as well as in a grown quartz crystal.
Cracks and fractures: There shall be no cracks, chippings, or fractures in the usable region.
Inclusion density: The specification is following the IEC 60758

Size range	Qty per cm3
Grade	10 to 30 µm	30 to 70 µm	70 to 100 µm	>100 µm
Ia	2	1	0	0
Ib	3	2	1	1
I	6	4	2	2
II	9	5	4	3
III	12	8	6	4

Infra-red quality indication: The specification is following the IEC 60758.

Grade	Max. α3585	Estimated Q Values (×10⁶)
A	0.015	3.8
A	0.024	3
B	0.05	2.4
C	0.069	1.8
D	0.1	1.4

Etch channel density: The specification is following the IEC 60758.

Grade	Max. Number per cm³
1	10
2	30
3	100
4	300
5	600

lumbered Quartz Crystal Materials Specifications

Angles:

Rotation angle of X-surface around Y-axis: 00°00’±15’
Rotation angle of X-surface around Z-axis: 00°00’±15’

Dimensional tolerance:

Along X or Z axis:±0.1 mm
Along Y axis:±10 mm

Surface roughness: customized, lapped, and polished are both available.

lumbered Quartz Crystal Materials Specifications

Quartz Crystal Materials Hydrothermal Growth Process

The autoclave is filled to some predetermined factor with water plus mineralizer (NaOH or Na2CO3).
The baffle localizes the temperature gradient so that each zone is nearly isothermal.
The seeds are thin slices of (usually) Z-cut single crystals.
The nutrient consists of small (~2½ to 4 cm) pieces of single-crystal quartz (“lascas”).
The temperatures and pressures are typically about 3500C and 800 to 2,000 atmospheres; T2 - T1 is typically 40C to 100C.
The nutrient dissolves slowly (30 to 260 days per run), diffuses to the growth zone, and deposits onto the seeds.

Quartz Crystal Materials Refractive Index Vs. Wavelength

l (mm)	n₀	nₑ	l (mm)	n₀	nₑ	l (mm)	n₀	nₑ
0.185	1.676	1.690	0.243	1.605	1.617	0.589	1.544	1.553
0.194	1.660	1.673	0.263	1.593	1.604	1.083	1.534	1.543
0.204	1.643	1.656	0.291	1.581	1.591	1.800	1.524	1.532
0.219	1.625	1.637	0.340	1.567	1.577	2.500	1.512	1.520
0.231	1.614	1.626	0.405	1.557	1.567	3.000	1.500	1.507

Quartz Crystal Materials Applications

Frequency Control Devices: Used in quartz oscillators, resonators, and filters for precise timekeeping and signal processing in electronics.
Optical Components: Ideal for lenses, windows, and prisms due to their high transparency and low birefringence.
Scientific Research: Utilized in high-precision experiments and advanced material studies requiring stable and pure crystal structures.
Acoustic Wave Devices: Essential for surface acoustic wave (SAW) and bulk acoustic wave (BAW) components in telecommunications and sensors.
Laser and Photonics Applications: Applied in laser optics and nonlinear optical devices for high-performance light transmission and modulation.

Quartz Crystal Materials Packing And Shipping

Quartz (SiO2) Crystal Materials will be securely packaged in sturdy containers with cushioning materials to prevent movement or damage during shipping. This careful packaging ensures that the product arrives in perfect condition, maintaining its high-quality standards throughout the delivery process.

Where to Buy Quartz Crystal Materials in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Conductive Glass Substrates products including Quartz (SiO2) Crystal Materials, leverages extensive expertise in supply and export to offer competitive prices. We provide customized solutions to meet specific requirements, ensuring exceptional quality and customer satisfaction.

Heeger Materials Inc. was established in 2016 in Colorado, USA. We specialize in premium-grade metals, alloys, ceramics, powders, and other materials catering to research, development, and large-scale industrial production in scientific and industrial sectors.

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