Alpha-SiAlON/BN composite ceramic material and preparation method thereof
A technology of composite ceramics and raw materials, applied in the field of composite ceramic materials, to achieve high-temperature mechanical properties, simple preparation process, and good thermal shock resistance
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Embodiment 1
[0028] It is doped with yttrium oxide with a purity higher than 99.9%, and uses α-phase silicon nitride, aluminum nitride and aluminum oxide powder as raw materials. Select the dosing point in the α-SiAlON single-phase plane, according to the molecular formula Y m / 3 Si 12-(m+n) Al m+n o n N 16-n Calculate the mass percentage of silicon nitride, aluminum nitride, aluminum oxide and yttrium oxide in the raw material powder when 1.0
Embodiment 2
[0030] Compared with Example 1, the molecular formula of its Y-α-SiAlON ceramics is Y m / 3 Si 12-(m+n) Al m+n o n N 16-n , where m=1.2, 0.8
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