A: No. The manual explicitly states the P90 is designed for pressing and firing silicate ceramics and leucite-reinforced materials. Zirconia requires a high-temperature sintering furnace (up to 1,600°C). Using zirconia in the P90 will melt the heating elements.
The most referenced section of the is the control panel layout. Unlike touchscreen modern furnaces, the P90 relies on a tactile membrane keypad. Ivoclar Programat P90 Manual
Verify the following settings on the display: Standby Temperature ( ): Usually around Closing Time ( ): Time taken for the furnace head to close. Heating Rate ( ): Temperature increase per minute. Firing Temperature ( ): The peak temperature for the cycle. Holding Time ( ): Duration the peak temperature is maintained. Ivoclar Programat P90 Manual