Table 1: Comparison of recently reported Curie temperatures of orthorhombic PbNb2O6 samples.

SampleSinteringCurie temperature in °C
Temp. (°C)Time (h)

Present12704.5 for 4.0 MHz, and >574 for 0.5 kHz.
[17]12704.5517
[18]1270534 and 540 (both at 10 kHz)
[19]540 (presumably at 80 kHz)
[20]1240–12604530 (at 10 kHz)
[13]12704.5531 (at 1 kHz), 528 (at 1 MHz) and 533 (at 10 MHz)