论文部分内容阅读
在自然界中,硬度最大的物质是什么呢?一提这个问题,人们就想到了金刚石,认为金刚石是自然界中最硬的物质。这种回答虽然正确,但不全面。实际上除了金刚石外,还有象碳化硅,α-Al_2O_8,碳化硼等,都是一类超硬度物质,它们的物理性质与普通物质的物理性质相比,却存在着很大差异。这种差异是由其特殊结构所引起的。本文简单地介绍它们的基本特性. 一、金刚石 金刚石的化学成份为C。纯净的金刚石为无色透明固体,硬度为10,密度3.51克/厘
In nature, what is the most rigid material? To mention this question, people think of diamonds and think that diamond is the hardest material in nature. Although this answer is correct, it is not comprehensive. In fact, in addition to diamond, there are silicon carbide, α-Al_2O_8, boron carbide, and so on, which are all superhard materials. Their physical properties are very different from those of ordinary materials. This difference is caused by its special structure. This article briefly describes their basic characteristics. I. Diamond The chemical composition of diamond is C. Pure diamond is a colorless, transparent solid with a hardness of 10 and a density of 3.51 g/l