The PI film is used to seal an otherwise rigid cavity that is then filled with high-pressure gas, as shown schematically in Figure9b.
To achieve this, the seal material must be resilient enough to flow into and fill any irregularities in the surfaces being sealed and at the same time remain rigid enough to resist extrusion into clearances.
One simple design utilizes a rigid fibre as a horizontal beam, supported at its centre by a stretched horizontal quartz torsion fibre sealed to it at right angles.
To allow measurements of other samples, which do not provide a rigid closure of the PA cell or if measuring without N2 ventilation is preferred, the cell can be sealed with a thin chemical vapor deposition (CVD) diamond window (Diamond Materials).
Sealed air surrounds the inner room, and all four sides are buffered with springs or soft materials like rubber, so that no rigid part of the room directly touches the outer structure.
The rigid nature of sealing glass-ceramics restricts the thermal cycling stability of Solid Oxide Fuel Cells (SOFCs), which thus evokes an interest in designing a sealing glass without crystallization under the operational condition of SOFCs.
A giant Connecticut state seal graces the rigid frame's center.
For in vivo measurements the sensor has to be placed directly on the human skin which then provides a rigid seal of the PA cell.
By Mr. Mandela's rigid timetable, the Burundians were to seal their intention to end seven years of civil war in an accord signed in front of Mr. Clinton and several dozen other heads of state.
