An aerosol-generating system comprising: an electrical power supply； an electrical heater connected to the electrical power supply； and a substrate container comprising a blind cavity containing an aerosol-forming substrate in the form of a gel that is solid at room temperature； wherein the electrical heater is external to the substrate container and is configured, to heat the substrate container without contacting the aerosol-forming substrate to generate a vapour from the aerosol-forming substrate. The provision of a gel rather than liquid is advantageous both for storage and transport, and during use. A gel can also provide a dense and stable aerosol. The heating of the gel without requiring the gel to contact the heater is advantageous because it reduces the possibility of unwanted material building up on the heater. If the heater is separate to the gel, the heater may remain clean and so less maintenance is required and the performance of the system may be more reliable and consistent.一種氣溶膠產生系統，其包括：一電源供應器、一連接至該電源供應器之電熱器以及一基材容器，該基材容器包括一封閉的空腔且該空腔包含在室溫為固態之凝膠形式的一氣溶膠形成基材；其中該電熱器係在該基材容器外部且被配置成加熱該基材容器而不接觸該氣溶膠形成基材，以從該氣溶膠形成基材產生蒸氣。提供凝膠而非液體在儲存與傳送上以及在使用中都是有益的。凝膠亦可提供稠密且穩定的氣溶膠。加熱該凝膠而不需使該凝膠接觸加熱器是有益的，因為能減少在該加熱器上積聚不必要之材料的可能性。若該加熱器與該凝膠為分開的，該加熱器可維持乾淨並因此比較不需要維修，而且該系統之性能可能更可靠且一致。
