What is the polarization strength of conventional ferroelectric materials?

Below 10UC/CM2. According to the query "ferroelectric thin film materials and their applications", traditional ferroelectric materials polarization strength will be lower than 10UC/CM2, in the absence of an applied electric field, the polarization strength of the medium is equal to zero. Traditional ferroelectric materials are mostly oxides with a three-dimensional chalcogenide structure, and they are usually insulators with a large bandgap and low mobility, making them difficult to be compatible with existing silicon-based semiconductor devices.