| CPC C04B 35/58007 (2013.01) [B01J 27/24 (2013.01); B01J 35/39 (2024.01); B01J 35/40 (2024.01); B01J 35/73 (2024.01); B01J 37/08 (2013.01); C04B 35/6303 (2013.01); C04B 35/645 (2013.01); G01N 33/0027 (2013.01); H01G 4/1254 (2013.01); B01J 2235/00 (2024.01); B01J 2235/15 (2024.01); B01J 2235/30 (2024.01); C04B 2235/3856 (2013.01); C04B 2235/3886 (2013.01); C04B 2235/3895 (2013.01); C04B 2235/6562 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/658 (2013.01); C04B 2235/768 (2013.01); C04B 2235/786 (2013.01); C04B 2235/85 (2013.01); C04B 2235/9661 (2013.01)] | 21 Claims |

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1. A sintered body comprising:
polycrystalline grains of a metal oxynitride containing at least two metal elements,
wherein Ba and at least one metal element of a crystal phase of the sintered body are contained in a triple point that is not a void between the polycrystalline grains.
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