Cartridge for an aerosol-generating system

A cartridge for an aerosol-generating system is provided, the cartridge including: a liquid storage portion including a housing containing a liquid aerosol-forming substrate; a heater assembly including an electrical heating element configured to heat the liquid aerosol-forming substrate to form an aerosol; and a capillary material disposed in contact with the electrical heating element and including a ceramic or a ceramic-based material, the capillary material being configured to convey the liquid aerosol-forming substrate to the electrical heating element, the electrical heating element being supported by a support element having an opening, and the heater assembly further includes first and second electrically conductive contact portions disposed at opposite sides of the opening and being configured to contact with an external electrical power supply. An aerosol-generating system including the cartridge is also provided.