INDUSTRY COMPONENT

Crystal Lattice Structure

The precise atomic arrangement within high-purity quartz crystal blanks that determines their piezoelectric properties for frequency control applications.

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Component Specifications

Definition
The crystal lattice structure refers to the highly ordered, repeating three-dimensional arrangement of silicon and oxygen atoms in a quartz crystal blank. This specific atomic configuration, typically following a trigonal/trapezohedral symmetry (space group P3121 or P3221), is essential for the material's piezoelectric behavior. The lattice orientation (cut angle) relative to the crystal axes directly influences the frequency, temperature stability, and performance characteristics of the final quartz resonator or oscillator.
Working Principle
The crystal lattice structure enables piezoelectricity through its non-centrosymmetric atomic arrangement. When mechanical stress is applied, the lattice deforms slightly, causing a separation of positive and negative charge centers and generating an electric voltage (direct piezoelectric effect). Conversely, applying an electric field causes mechanical deformation (inverse piezoelectric effect). This property allows the crystal to mechanically vibrate at a precise natural resonant frequency when excited by an alternating electric field, making it ideal for frequency control and timing applications.
Materials
High-purity synthetic quartz (SiO₂) with impurity levels below 5 ppm, typically grown using hydrothermal or flame fusion methods. The material must have a precisely controlled crystal orientation (common cuts: AT, SC, IT) and minimal lattice defects (dislocations, vacancies) to ensure consistent piezoelectric properties.
Technical Parameters
  • Density 2.65 g/cm³
  • Aging Rate <5 ppm/year
  • Space Group P3121 or P3221
  • Mohs Hardness 7
  • Crystal System Trigonal
  • Frequency Range 1 kHz to 300 MHz
  • Lattice Parameters a = 4.913 Å, c = 5.405 Å
  • Frequency Tolerance ±10 ppm to ±100 ppm
  • Operating Temperature -40°C to +125°C
  • Piezoelectric Constants d11 = 2.3 pC/N, d14 = 0.727 pC/N
Standards
IEC 60122-1, IEC 60368, MIL-PRF-3098, EIA-512

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Crystal Lattice Structure.

quartz crystal lattice piezoelectric crystal structure atomic arrangement frequency control resonator blank crystal orientation lattice parameters SiO2 structure Crystal Lattice Structure Crystal Lattice Structure in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

High-Purity Quartz Crystal Blank

Raw quartz crystal material for precision timing and frequency control devices.

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Engineering Analysis

Risks & Mitigation
  • Lattice defects from improper cutting
  • Orientation errors exceeding tolerance
  • Surface contamination affecting vibration
  • Thermal stress causing microcracks
  • Aging-induced frequency drift
FMEA Triads
Trigger: Improper crystal orientation during cutting
Failure: Incorrect frequency output, poor temperature stability
Mitigation: Implement X-ray diffraction orientation verification, use precision diamond saws with angular control <0.1°
Trigger: Lattice damage from aggressive polishing
Failure: Reduced Q-factor, increased phase noise
Mitigation: Use progressive fine abrasives (down to 0.1μm), chemical-mechanical polishing, regular surface inspection
Trigger: Thermal shock during processing
Failure: Microcracks propagating through lattice
Mitigation: Control temperature gradients <5°C/min, use gradual heating/cooling cycles, avoid rapid thermal cycling

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Frequency tolerance ±10-100 ppm, orientation accuracy ±0.1°, surface roughness <0.1μm Ra, flatness <1λ @ 633nm
Test Method
X-ray diffraction for orientation, laser interferometry for flatness, network analyzer for frequency response, SEM for surface inspection, thermal cycling tests

Buyer Feedback

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"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Crystal Lattice Structure meets all ISO standards."

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Frequently Asked Questions

Why is the crystal lattice structure critical for quartz timing devices?

The specific atomic arrangement determines the piezoelectric properties that enable precise mechanical vibrations at stable frequencies when electrically excited, making quartz ideal for clocks, oscillators, and frequency control applications.

How does crystal orientation affect performance?

Different cut angles (AT, SC, IT) relative to the crystal axes create different vibration modes and temperature characteristics. AT-cut crystals provide excellent temperature stability, while SC-cuts offer better aging performance.

What manufacturing processes ensure proper lattice structure?

High-purity synthetic quartz growth (hydrothermal method), precision X-ray orientation, diamond saw cutting along specific crystallographic planes, and careful lapping/polishing to minimize lattice damage.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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