In general, it is not advisable to use metal in a microwave, including a convection microwave. When microwaves interact with metal, it can cause electric currents to flow through the metal object, which can lead to arcing (sparks) and potentially damage the microwave or the metal itself. It can also cause a fire hazard.
The reason metal should not be used in microwaves is because microwaves work by producing electromagnetic waves that excite water molecules in food, generating heat. Metal reflects these waves and can create an uneven distribution of energy, potentially causing the metal to become extremely hot and posing a risk.
When using a convection microwave, which combines the functions of a microwave and a convection oven, it is recommended to use microwave-safe cookware. These are usually made of glass, ceramic, or microwave-safe plastics. These materials allow the microwaves to penetrate the food and heat it evenly without the risk of damage or safety hazards associated with metal.
If metal is accidentally used in a convection microwave, it can cause sparks and potentially damage the appliance. It's important to avoid placing any metal objects, such as aluminum foil, metal pans, or utensils, inside the microwave. Always follow the manufacturer's instructions and guidelines for safe use of your specific convection microwave model.
Using metal in a microwave can have unpredictable effects on the food as well. It can create hot spots or uneven heating, leading to undercooked or overcooked areas. Additionally, there is a risk of arcing and potential damage to the microwave itself.
To ensure safe and efficient cooking in a convection microwave, it's best to stick to microwave-safe cookware and avoid using any metal containers or utensils.