| abstract |
The present invention provides a large ceramic plate that satisfies freeze-thaw resistance, strength, and thermal shock resistance. It is characterized in that the water absorption rate specified by JIS (Japanese Industrial Standard) A1509-3 (2014) is 1% or less, mullite is contained as a crystal phase, and quartz is not contained, or the concentration of the quartz exceeds 0% by mass. In a preferred embodiment, the Zr element in an amount of 3% by mass or more and 15% by mass or less in terms of ZrO2 and the Ca element in an amount of more than 0% by mass and not more than 1% by mass in terms of CaO, and The large ceramic plate of the present invention can provide excellent thermal shock resistance in terms of Mg element in an amount of more than 0% by mass and not more than 1% by mass in terms of MgO. |