Metal Diaphragm: Frequency Range 20 kHz - 5 MHz

Component Specifications

Definition

A thin, flexible metal membrane designed to oscillate at ultrasonic frequencies when subjected to alternating electrical signals. It serves as the active vibrating element in piezoelectric or magnetostrictive ultrasonic transducers, generating mechanical vibrations that propagate as ultrasonic waves for applications such as cleaning, welding, measurement, and medical imaging.

Working Principle

The metal diaphragm operates on the principle of piezoelectric or magnetostrictive transduction. When an alternating electrical voltage is applied to the transducer's piezoelectric element (or a magnetic field to a magnetostrictive element), it induces mechanical strain, causing the attached metal diaphragm to vibrate at ultrasonic frequencies (typically 20 kHz to several MHz). These vibrations produce pressure waves in the surrounding medium (e.g., liquid or air).

Materials

High-strength alloys such as titanium (Ti-6Al-4V), stainless steel (e.g., 316L), aluminum alloys (e.g., 6061-T6), or beryllium copper, selected for fatigue resistance, corrosion resistance, and acoustic properties. Thickness ranges from 0.05 mm to 0.5 mm, depending on frequency and application.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	10 mm - 100 mm
Surface Finish	Ra ≤ 0.4 μm
Frequency Range	20 kHz - 5 MHz
Resonance Stability	±1% over operating temperature
Thickness Tolerance	±0.005 mm
Operating Temperature	-40°C to 150°C

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

Standards

ISO 18563-1, DIN EN 12668-1, ASTM E494

Parent Products

This component is used in the following industrial products

Ultrasonic Transducer

A piezoelectric device that converts electrical energy into high-frequency mechanical vibrations to atomize water in humidifiers.

View Product Details

Piezoelectric Sounder

An electronic audio signaling device that generates sound using piezoelectric effect

View Product Details

Engineering Analysis

Risks & Mitigation

Fatigue failure from high-cycle vibration
Corrosion in chemical environments
Resonance frequency drift affecting performance
Cavitation erosion in liquid applications

FMEA Triads

Trigger: Material fatigue from continuous ultrasonic cycling
Failure: Crack formation leading to diaphragm rupture
Mitigation: Use high-fatigue-strength alloys, implement stress relief designs, and conduct regular inspection

Trigger: Exposure to corrosive media (e.g., acids, salts)
Failure: Corrosion reducing thickness and altering vibrational properties
Mitigation: Select corrosion-resistant materials (e.g., stainless steel, titanium), apply protective coatings

Trigger: Improper mounting or over-torquing during installation
Failure: Distortion or stress concentration causing premature failure
Mitigation: Follow torque specifications, use alignment tools, and train personnel on installation procedures

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 2768-m, frequency tolerance ±2% of nominal

Test Method

Resonance testing via impedance analyzer, fatigue testing per ASTM E466, corrosion testing per ASTM G31

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

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Manufacturers of Metal Diaphragm

Manufacturer profiles associated with Metal Diaphragm.

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Frequently Asked Questions

What is the primary function of a metal diaphragm in an ultrasonic transducer?

It converts electrical energy into mechanical vibrations at ultrasonic frequencies, generating sound waves for applications like cleaning, welding, or imaging.

How does material selection affect diaphragm performance?

Materials like titanium offer high strength and corrosion resistance for harsh environments, while aluminum provides lightweight performance; choice impacts frequency response, durability, and compatibility with media.

What are common failure modes of metal diaphragms?

Fatigue cracking from cyclic stress, corrosion in aggressive fluids, and resonance shift due to material degradation or contamination.

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.

Metal Diaphragm