Small-signal measurements

AThe reference measuring instrument for the measurement of piezoelectric and dielectric small-signal data such as frequencies, impedances, coupling factors, capacitances and loss factors, is the Precision Impedance Analyzer 4194A from Agilent Technologies (formerly HP).

Large-signal measurements

DC measurements with voltages of up to 1200V are carried out in an automated test routine on actuators to determine the strain, hysteresis and dielectric strength. AC measurements in the high-power acoustic range are used to determine acoustic performance.

Geometric and visual testing processes

In general, calibrated measuring equipment of appropiate precision is used to verify the geometry of the components.
Modern 3D measuring microscopes are available for complicated measurements and visual inspections.

Visual limits

Ceramic components must be conform to visual specifications and criteria.
In accordance with the specifications in MIL-STD-1376, PI Ceramic has created its own finish criteria for the purpose of evaluating quality and has defined a series of categories for the various application requirements. The finish criteria relate to:

• Surface finish of the electrodes
• Pores in the ceramic
• Chipping of the edges

Unless specified otherwise, it is held that visual peculiarities do not necessarily affect the functioning of the component.
PI Ceramic’s finish criteria incorporate this principle in the visual limit values.

Quality monitoring, quality level

PI Ceramic works with quality management systems and is certified in accordance with ISO 9001-2000.
This certification assures our customers of the quality of our products and manufacturing procedures.
This certification assures our costumers of the quality of our products and manufacturing procedures. The quality of the raw materials, intermediate and end-products is monitored according to specific quality assurance plans. Quality management documentation assures that only approved parts, which conform to the quality specifications, pass the processing and delivery stage.

Quality level

We carry out all tests of the electrical, mechanical and visual properties in accordance with standardized sampling methods. The level of testing is in accordance with DIN ISO 2859 Part 1.
For custom products, we strive to reach mutual agreement on quality and testing stipulations.

If the customer so requires, it can also be agreed that this includes providing copies of the respective release documents, metrology reports or, in special cases, individual test reports on samples or entire batches.