In this work we investigated the sintering behaviour of apatite-wollastonite (AW) glass-ceramic powders with the presence of alumina, firstly detected as a potentially useful surface contaminant derived from the ball milling of the powder, and then as a dopant in the glass formulation. All powders were benchmarked against AW without alumina. A small percentage of contamination (0.14 wt%) showed to delay the melting of material, and lower densification derived from a lower ability to crystallize and higher stability in the glassy states. The doped AW revealed that an increase in alumina favoured the formation of a glassy phase, increasing the degree of necking and the development of crystals. In conclusion, the introduction of alumina improves the AW glass-ceramic processability when content and process parameters are optimized.

在这项工作中，我们研究了有氧化铝存在的磷灰石-硅灰石（AW）玻璃陶瓷粉末的烧结行为，首先被检测为源自粉末球磨的潜在有用表面污染物，然后被检测为玻璃中的掺杂剂。公式。所有粉末均以不含氧化铝的AW为基准。少量的污染（0.14 wt％）显示出延迟了材料的熔化，并且较低的致密化源自较低的结晶能力和较高的玻璃态稳定性。掺杂的AW表明，氧化铝的增加有利于玻璃相的形成，增加了颈缩的程度和晶体的发展。总之，当优化含量和工艺参数时，氧化铝的引入改善了AW玻璃陶瓷的可加工性。