Brittle article comprising joined-together hardened glass and/or glass-ceramic parts and method of making same

A method of making a cooking panel providing a cooking surface, wherein said cooking panel is made by joining at least two partners together at edges of said at least two partners by a joining means, and said at least two partners are selected from the group consisting of hardened glass parts and glass-ceramic parts each having a linear thermal expansion coefficient less than 6*10−6K−1, said method comprising the steps of:

• a) placing the partners to be joined together in an edge-to-edge relationship with a metallic ductile joining material between said edges of said partners in a high frequency alternating electric field, wherein during the placing only the metallic ductile joining material is arranged between the edges of the partners and said metallic ductile joining material is selected from the group consisting of silver, aluminum, copper, alloys of silver, alloys of aluminum and alloys of copper;
• b) inductively heating the metallic ductile joining material locally with the high frequency alternating electric field to melt the metallic ductile joining material;
• c) pressing the edges of the partners to be joined together for a predetermined time between 30 and 900 s with a predetermined pressure between 0.2 and 0.4 MPa with only the metallic ductile joining material between said edges to form a bond between the partners, said joining time and said joining pressure depending on the nature of said metallic ductile joining material and a field strength of said high frequency alternating electric field;
• and
• d) tempered cooling of the partners joined together in step c), whereby said cooking panel is obtained.