In this work, basalt from the Serra Geral Formation, Brazil, was used to prepare a glass frit from which glass-ceramics were produced by the sinter-crystallization process. After different heat treatments in an inert atmosphere, properties were evaluated, as well as their relationship with the obtained microstructure. The results show that bulk density, hardness and crystallinity index increased with the treatment time up to the final temperature, with highest values for the longest heat treatment (6.5 h), respectively 2.39 g/cm³, 74.8% and 9.81 GPa. However, a shorter heat treatment (2.5 h) at the same final temperature resulted in comparable values (respectively, 2.38 g/cm³, 72.3% and 9.68 GPa). As such, isothermal steps at intermediate crystallization temperatures have no relevant influence on the final microstructure. Thus, for this basalt, nucleation is a very fast process and crystal growth is likely rather limited and little improved by intermediate crystallization heat treatment steps.

在这项工作中，巴西Serra Geral地层的玄武岩被用于制备玻璃料，通过烧结结晶法从中生产出玻璃陶瓷。在惰性气氛中进行不同的热处理后，评估性能以及它们与所得微结构的关系。结果表明，堆密度，硬度和结晶度指数分别与处理时间直到最终温度的提高，具有最高值的最长热处理（6.5小时），2.39克/厘米³，74.8％和9.81 GPA。但是，在相同的最终温度下进行较短的热处理（2.5小时）可得到可比较的值（分别为2.38 g / cm ³，72.3％和9.68 GPa）。这样，在中等结晶温度下的等温步骤对最终的微观结构没有相关的影响。因此，对于这种玄武岩，成核是非常快速的过程，并且晶体的生长很可能受到限制，并且通过中间的结晶热处理步骤几乎没有改善。