Subscribe to our newsletter to receive the latest news and events from TWI:

Subscribe >
Skip to content

Conductive adhesive for ultrasound catheter

Back to Pre-1998 Articles Adhesive technology demonstration centre Aged samples lend added credence to safety codes Arc welding Demonstration Centre shows best practice in action Boiler takes the heat in comfort Conductive adhesive for ultrasound catheter cracking-risk-in-steel-pipelines-from-external-hard-zones Engineering critical assessment of pipeline welds Far East fitness-for-purpose check First UK Research Council contract for TWI Friction stir welding of titanium Help with adhesives training Joining demonstration centres in industry Joining Forces success in Belfast Joints take 10 seconds in the microwave LIVEMAN - Advanced joining processes for lightweight vehicle manufacture Making calculations easier 'Mildly sour' environment project saves half a million pounds New standard for weld fracture toughness testing Novel method joins plastic pipes Plastics fume - new findings released Project saves time and money for Amerada Hess Small firms seize no-cost reviews and low-cost trials South East Asia ACFM course Space Shuttle technology transferred to power generation industry Spot the evidence Structural integrity assured for Liverpool Bay Supporting technology on the Indian sub-continent Technology demonstrators show best practice in action Thermomechanical material processing by friction [friction pillar processing] 'Tubestress' measures residual stresses in parts that other equipment cannot reach TWI enhances on-stream inspection service Underwater welding work expands at TWI North Wider recognition for welding inspectors

Conductive adhesive for ultrasound catheter

Connect, no.76, May 1996

Intravascular Research Ltd has been working with TWI's Centre for Adhesive Technology (CAT) to assess the use of electrically conductive adhesives to join two components of a catheter tip.

The tip is part of an ultrasound imaging device for quantitative and diagnostic analysis of coronary arteries.

Piezoelectric (PZT) transducer rings were bonded to tungsten carbide (WC) tubes using silver-loaded epoxy adhesives. Selection of adhesives was based on the following requirements:

  • good adhesion to both PZT and WC
  • rapid, low temperature curing
  • ease of manual or automated dispensing
  • electrically conductive (resistivity of about 1.4 X 10-3W)
  • zero or low volatile emission during cure
  • thermal stability: 1000C continuous, 1500C intermittent
  • low shrinkage (0.5% or less) on curing
  • coefficient of thermal expansion compatible with PZT and WC
  • ability to withstand sputter-coating and machining processes

Adhesive dispensing and curing have been optimised to provide a void-free, 80mm conducting layer with required acoustic properties.

Catheter tips assembled using conducting adhesive have been taken through mechanical testing to clinical trials.

For more information, please contact us.

For more information please email: