The crack patterns generated in a real ceramic plate and in a plate stacked by ceramic slabs under quenching are experimentally studied. The results here reveal that there are some distinct differences between the two crack patterns. The reasons that caused the differences are the size and boundary effects of the slabs. These crack patterns are very useful to understand the failure mechanisms of ceramic materials in thermal shock. This paper was published as: Shao YF, Xu XH, Meng SH, Bai GH, Jiang CP, Song F. Crack Patterns in Ceramic Plates after Quenching.JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 93(10):3006-3008(2010)