Since its founding in 2007, TBT Group (TBT) has become the premier U.S. source of advanced piezoelectric, piezoceramic and dielectric materials for customers seeking Company Type For Profit. Contact Email [email protected]. Phone Number 212-685-1837. TBT Group is a US based manufacturer of specialized ceramic components that are used in many different electrical applications in the defense and commercial industries.TBT Expeditie. Specialized in both intra-Community and non-EU goods transport, we are the solution to your logistical needs.