Effects of Crystallinity of NH<sub>4</sub>AlO(OH)HCO<sub>3</sub> on the Sinterability of α-Alumina

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  • α‐アルミナの焼結性に及ぼすNH?S4?TAlO(OH)HCO?S3?T母塩の結晶性の影響
  • アルファ アルミナ ノ ショウケツセイ ニ オヨボス NH4AlO OH HC

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Effect of crystallinity of parent salt on the sinterability of α-alumina has been studied. Two series of NH4AlO(OH)HCO3 tentatively designated as I- and R-series, were prepared under the different conditions.<br>It is shown that the sinterability of the α-alumina powders of I-series increased with decreasing crystallinity of the parent salt. Alpha-alumina powder of the R-series, on the other hand, exhibited the sinterability comparable to that of poor-crystallized I-series powders in spite of the good crystallinity. This is explained in terms of the well-dispersed nature of the primary particles of parent salt.

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