INDUSTRY COMPONENT

Quartz Crystal Blank

A precisely cut quartz crystal blank that serves as the frequency-determining element in quartz crystal oscillators.

Component Specifications

Definition
A quartz crystal blank is a thin, precisely dimensioned slice of synthetic quartz crystal that has been cut at a specific crystallographic orientation (such as AT-cut, SC-cut, or BT-cut) to achieve desired frequency and temperature stability characteristics. When subjected to an alternating electric field via attached electrodes, it mechanically vibrates at its natural resonant frequency due to the piezoelectric effect, providing a stable frequency reference for electronic circuits.
Working Principle
The quartz crystal blank operates on the piezoelectric principle: when mechanical stress is applied, it generates an electric charge, and conversely, when an electric field is applied, it undergoes mechanical deformation. In an oscillator circuit, the blank is excited by an alternating voltage, causing it to vibrate at its precise resonant frequency, which is determined by its physical dimensions, cut angle, and material properties. This vibration creates a stable electrical signal used for timing and frequency control.
Materials
Synthetic alpha-quartz (SiO2), typically grown using hydrothermal or autoclave methods to achieve high purity and consistent properties. Electrode material: Gold, silver, or aluminum deposited via sputtering or evaporation.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Aging<5 ppm per year
Drive Level10 μW to 100 μW
Frequency Range1 kHz to 300 MHz
Load Capacitance8 pF to 32 pF
Frequency Tolerance±10 ppm to ±100 ppm
Operating Temperature-40°C to +85°C
ESR (Equivalent Series Resistance)10 Ω to 100 Ω

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
IEC 60122-1, IEC 60444, MIL-PRF-3098

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Frequency drift due to temperature changes
  • Mechanical damage from shock or vibration
  • Contamination affecting electrode adhesion
  • Aging causing long-term frequency shift
FMEA Triads
Trigger: Improper electrode deposition
Failure: High ESR or no oscillation
Mitigation: Implement controlled sputtering processes with in-situ monitoring and regular calibration of deposition equipment.
Trigger: Crystal blank contamination during handling
Failure: Frequency instability or premature aging
Mitigation: Use cleanroom environments (ISO Class 5 or better), automated handling systems, and strict contamination control protocols.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Frequency tolerance typically ±20 ppm at 25°C; temperature stability ±10 ppm over operating range
Test Method
Frequency measured using high-precision counters or network analyzers; temperature testing in environmental chambers per IEC 60068-2-1/2

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Quartz Crystal Blank

Manufacturer profiles associated with Quartz Crystal Blank.

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Frequently Asked Questions

What determines the frequency of a quartz crystal blank?

The frequency is primarily determined by the physical thickness of the blank (thinner blanks yield higher frequencies) and the crystallographic cut angle, which affects temperature stability and harmonic modes.

Why is synthetic quartz used instead of natural quartz?

Synthetic quartz offers higher purity, fewer defects, and more consistent material properties, leading to better frequency stability, lower aging rates, and reliable mass production compared to natural quartz.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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