Reaction Sintering of Zinc Ferrite during Constant Rates of Heating
Reaction Sintering of Zinc Ferrite during Constant Rates of Heating
复制标题
恒速加热过程中铁氧体锌的反应烧结
DOI：
10.1111/j.1151-2916.1993.tb06642.x
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
L. Jonghe
中科院分区：
文献类型：
--
作者：
M. Rahaman;L. Jonghe
研究了等摩尔量的氧化锌和氧化铁在恒定加热速率（1-10°C/min，从室温到1350°C）条件下的反应烧结，并将数据与煅烧的单相铁酸锌粉末的数据进行了比较。对于1 ℃/min的加热速率，反应烧结样品和煅烧样品的致密化大致相同。然而，随着加热速率的增加，在任何温度下的密度略有增加的反应烧结样品，但略有下降的煅烧粉末。反应烧结的样品和煅烧的样品之间的烧结的这种轻微的差异的因素进行了讨论。对于所使用的恒定加热速率，反应在任何显著的致密化之前完成。在相同的烧结条件下（1-10 ℃/min至1350 ℃），反应烧结样品和煅烧样品均获得>95%的相对密度。在陡峭的温度梯度中的反应烧结在完全反应之前产生了几乎完全致密的体;获得了由在铁酸锌基体中的细氧化锌晶粒组成的复合微观结构。
The reaction sintering of equimolar quantities of zinc oxide and ferric oxide was investigated under conditions of constant rates of heating (1–10°C/min from room temperature to 1350°C) and the data were compared with those for a calcined, single-phase zinc ferrite powder. For the heating rate of 1°C/min, the densifications of the reaction-sintered sample and the calcined sample were approximately the same. However, as the heating rate increased, the density at any temperature increased slightly for the reaction-sintered sample but decreased slightly for the calcined powder. The factors responsible for this slight difference in sintering between the reaction-sintered sample and the calcined sample are discussed. For the constant heating rates used, the reaction was completed prior to any significant densification. Relative densities of >95% were obtained for both the reaction-sintered sample and the calcined sample under identical sintering conditions (1–10°C/min to 1350°C). Reaction sintering in a steep temperature gradient produced a nearly fully dense body prior to complete reaction; a composite microstructure consisting of fine zinc oxide grains in a matrix of zinc ferrite was obtained.