Nonstick cooking utensil with pure inorganic structural layer and manufacturing method thereof

A nonstick cooking utensil with a pure inorganic structural layer, comprising a base layer and a pure inorganic structural layer, wherein the pure inorganic structural layer is formed by spraying inorganic particles on an inner surface of the base layer;

• and the inorganic particles in the pure inorganic structural layer form a connected pore structure;
• and
• the pure inorganic structural layer comprises at least three inorganic structural sub-layers;
• the at least three inorganic structural sub-layers are sequentially stacked on the inner surface of the base layer according to sizes of the inorganic particles;
• the inorganic particles in the inorganic structural sub-layer adjacent to the base layer have a largest size;
• and in a direction away from the base layer, the sizes of the inorganic particles in the at least three inorganic structural sub-layers decrease sequentially, and pores in the at least three inorganic structural sub-layers decrease sequentially in the direction away from the base layer;
• wherein the at least three inorganic structural sub-layers are an oil storage layer, a slow-release curing layer, and a dispersed surface layer;
• and the oil storage layer, the slow-release curing layer, and the dispersed surface layer are disposed sequentially in the direction away from the base layer.