iridium

简明释义

英[ɪˈrɪdiəm]美[ɪˈrɪdiəm]

n. [化学] 铱（Ir）

英英释义

单词用法

同义词

反义词

例句

1.Change the 20-nanometer iridium to same-sized soot particles and the uptake rate falls by 75 percent.

若用相同大小的20纳米烟尘颗粒替换铱粒子，则摄入率降低75%。

2.In a laboratory vault outside Paris is a small cylinder of platinum-iridium alloy that serves as the standard for all mass measurements worldwide.

在巴黎郊外的一个实验室地下室中，有一个铂铱合金作的圆筒，这个圆筒就是作为世界上所有质量测量的标准。

3.They were especially interested in a 30-ft. layer of sediment just above the iridium layer.

他们对30英尺深度略高于铱层的一个沉积层特别感兴趣。

4.In a laboratory vault outside Paris is a small cylinder of platinum-iridium alloy that serves as the standard for all mass measurements worldwide.

在巴黎郊外的一个实验室地下室中，有一个铂铱合金作的圆筒，这个圆筒就是作为世界上所有质量测量的标准。

5.This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been discovered.

这一铱异常为阿尔瓦雷斯假说提供了强有力的支持，尽管小行星本身从未被发现。

6.As a result, the unit continued to be defined in explicit reference to a unique platinum-iridium ingot until 1960.

结果，直到1960年，这个计量单位都用一只独一无二的铂铱锭来标示。

7.Due to its high melting point, iridium is used in high-temperature applications.

由于其高熔点，铱被用于高温应用。

8.The iridium layer in the Earth's crust is a sign of past asteroid impacts.

地壳中的铱层是过去小行星撞击的迹象。

9.Scientists use iridium in catalysis for its unique properties.

科学家们在催化反应中使用铱，因为它具有独特的性质。

10.The watch is made with a special coating of iridium to enhance its durability.

这款手表采用了特殊的铱涂层，以增强其耐用性。

11.Some fountain pens are tipped with iridium for smoother writing.

一些钢笔的笔尖镶有铱，以便书写更流畅。

作文

Iridium is a fascinating element that belongs to the platinum group of metals. It is known for its remarkable properties, including its high density, corrosion resistance, and extreme hardness. The symbol for iridium is Ir, and it has an atomic number of 77. This unique metal is not only valuable in industrial applications but also plays a significant role in scientific research and technology. In this essay, we will explore the various aspects of iridium (铱), its uses, and its importance in our modern world.One of the most notable characteristics of iridium (铱) is its incredible resistance to corrosion. This property makes it an ideal material for use in harsh environments, such as in chemical processing plants where other metals might degrade quickly. For example, iridium (铱) is often used in the production of spark plugs and electrical contacts because it can withstand high temperatures and resist oxidation. Additionally, its durability ensures a longer lifespan for these components, which ultimately saves costs in manufacturing and maintenance.Another significant application of iridium (铱) is in the field of electronics. Due to its excellent conductivity, iridium (铱) is frequently utilized in the production of various electronic devices. Its ability to function effectively at high temperatures makes it a preferred choice for components like resistors and capacitors. Moreover, iridium (铱) is also used in the fabrication of specialized equipment, such as those used in space exploration. For instance, the Mars rover missions have incorporated iridium (铱) in their instruments due to its reliability and performance under extreme conditions.In addition to its industrial uses, iridium (铱) has also made a significant impact in the realm of scientific research. One of the most intriguing aspects of iridium (铱) is its connection to the extinction of dinosaurs. Scientists believe that a layer of iridium (铱) found in the geological record corresponds to the time of the mass extinction event approximately 66 million years ago. This discovery has led to the hypothesis that a meteorite impact, rich in iridium (铱), could have contributed to the dramatic changes in the Earth’s climate at that time, leading to the extinction of many species.Furthermore, iridium (铱) is also used in medical applications. Its radioisotope, iridium (铱)-192, is employed in cancer treatment through a process called brachytherapy. In this technique, iridium (铱)-192 sources are placed close to or inside tumors, allowing for targeted radiation therapy that minimizes damage to surrounding healthy tissues. This innovative approach highlights the versatility of iridium (铱) in improving healthcare outcomes.In conclusion, iridium (铱) is a remarkable element with a wide range of applications across various fields. Its unique properties, such as corrosion resistance, high density, and excellent conductivity, make it invaluable in industrial processes, electronics, scientific research, and even medicine. As technology continues to advance, the demand for iridium (铱) is likely to grow, further emphasizing its importance in our modern world. Understanding the significance of iridium (铱) not only enriches our knowledge of chemistry and materials science but also highlights the interconnectedness of elements and their roles in shaping our environment and future.

铱是一种迷人的元素，属于铂族金属。它以其显著的特性而闻名，包括高密度、耐腐蚀性和极高的硬度。铱的化学符号是Ir，原子序数为77。这种独特的金属不仅在工业应用中具有价值，而且在科学研究和技术中也发挥着重要作用。在本文中，我们将探讨铱（iridium）的各个方面，它的用途以及它在现代世界中的重要性。铱（iridium）最显著的特征之一是其令人难以置信的耐腐蚀性。这一特性使其成为在恶劣环境中使用的理想材料，例如在化学加工厂中，其他金属可能会迅速降解。例如，铱（iridium）常用于火花塞和电接触的生产，因为它能够承受高温并抵抗氧化。此外，它的耐用性确保了这些组件的更长使用寿命，从而最终节省了制造和维护成本。铱（iridium）的另一个重要应用是在电子领域。由于其优良的导电性，铱（iridium）常用于各种电子设备的生产。它在高温下有效工作的能力使其成为电阻器和电容器等组件的首选。此外，铱（iridium）还用于制造专用设备，例如用于太空探索的设备。例如，火星探测器任务就采用了铱（iridium）作为其仪器中的材料，因为它在极端条件下的可靠性和性能。除了工业用途，铱（iridium）在科学研究领域也产生了重大影响。铱（iridium）最引人注目的方面之一是它与恐龙灭绝的联系。科学家们认为，在地质记录中发现的一层铱（iridium）与大约6600万年前的物种大灭绝事件相对应。这一发现导致了一个假设，即富含铱（iridium）的陨石撞击可能导致了当时地球气候的剧变，进而导致许多物种的灭绝。此外，铱（iridium）在医疗应用中也被广泛使用。其放射性同位素铱（iridium）-192用于癌症治疗，通过一种称为近距离放射治疗的方法。在这种技术中，铱（iridium）-192源被放置在肿瘤附近或内部，从而实现针对性的放射治疗，最大限度地减少对周围健康组织的损害。这种创新方法突显了铱（iridium）在改善医疗结果方面的多样性。总之，铱（iridium）是一种具有广泛应用的显著元素。其独特的特性，如耐腐蚀性、高密度和优良的导电性，使其在工业过程、电子产品、科学研究甚至医疗中不可或缺。随着技术的不断进步，对铱（iridium）的需求可能会增长，进一步强调其在现代世界中的重要性。理解铱（iridium）的重要性不仅丰富了我们对化学和材料科学的知识，还突显了元素之间的相互联系及其在塑造我们的环境和未来中的作用。