CERAMIC PLATE AND ELECTRONIC APPARATUS

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PROBLEM TO BE SOLVED : To provide a ceramic plate and the like, which are effective in improvement of thermal conductivity and mechanical strength. SOLUTION : This invention relates to a ceramic plate 3 and the like, comprising : a silicon nitride crystal phase 1 including two or more silicon nitride crystals 11 and a grain boundary 12 between the silicon nitride crystals; and a silicate phase 2 located in the grain boundary 12 while including a magnesium silicate crystal 21 and a rare earth silicate crystal 22, each of which has a maximum grain size smaller than that of the silicon nitride crystal 11. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2019, JPO&INPIT