Finally, this model allows us to ch

最后，该模型允许我们根据所需的陶瓷功能（稠密与否）选择初始粉末形态。为了拥有致密的陶瓷，<br>最好的解决方案是两步烧结工艺，这仅适用于球体为初始粉末的情况。如果进行三步或四步过程，则减少球体重排步骤的能量垒的唯一方法是降低大孔率，这在很大程度上取决于初始粉末的形态。粒子越规则，重新排列的步骤就越容易。最后，关于球化步骤，减少能量屏障的两种方法是，一方面是在煅烧过程中已经在沟槽上形成了凹槽（例如开槽的针头），另一方面是使粒子变得尽可能薄，这导致了由于微晶具有与颗粒相同的尺寸，因此更易于球化。作为结论，我们假设优质的可烧结粉末即使存在高形状因数，也包含在小球或带槽颗粒中：据我们所知，这一结果是新的。普通颗粒比小球体的烧结粉末少，它们需要更高的能量来烧结，但如果提供足够的能量，则可以达到全密度。最后，不规则颗粒会产生可烧结粉末，这些粉末将永远无法达到高密度。

Finally, this model allows us to choose the initial powder morphology in relation with the desired functionality of the ceramic (dense or not). In order to have a dense ceramic,<br>the best solution would consist in a two-step sintering process which is the case only for spheres as initial powder. If a three- or four-step process takes place, the only way to reduce the barrier of energy of the step of rearrangement of spheres involves reducing the macroporosity, which depends strongly on the initial powder morphology. The more regular the particles are, the easier the step of rearrangement will be. Finally, concerning the step of spheroidization, the two ways to reduce the barrier of energy are, on the one hand to have particles already grooved during calcination such as grooved needles, or on the other, to have particles as thin as possible, which leads more easily to spheroidization because crystallites have the same size as particles. As a conclusion, we assume that good sinterable powders consist in small spheres or grooved particles even if they present high shape factors: this result is new as far as we know. Regular grains are less sinterable powders than small spheres and they need higher energy to sinter but can reach full density if enough energy is provided. Finally, irregular particles give poor sinterable powders that will never reach high densities.

最后，该模型允许我们根据陶瓷的功能性（致密与否）选择初始粉末形态。为了得到致密的陶瓷，<br>最好的解决方案是采用两步烧结工艺，这种方法只适用于作为初始粉末的球体。如果发生三步或四步过程，降低球体重排步骤的能量屏障的唯一方法是减小大孔隙率，而大孔隙率很大程度上取决于初始粉末形态。粒子越规则，重排的步骤就越容易。最后，关于球化的步骤，降低能量屏障的两种方法是，一方面使颗粒在煅烧过程中已经开槽，如开槽的针状物；另一方面，使颗粒物尽可能薄，这就更容易导致球化，因为微晶的大小与颗粒物相同。作为结论，我们假设好的可烧结粉末包含在小球体或沟槽状颗粒中，即使它们具有较高的形状因子：这一结果据我们所知是新的。规则颗粒的可烧结性比小球小，它们需要更高的能量来烧结，但如果提供足够的能量，它们可以达到完全密度。最后，不规则的颗粒会产生不易烧结的粉末，而这些粉末永远不会达到高密度。