Refractory metal

Japanese: 高融点金属材料 - こうゆうてんきんぞくざいりょう(英語表記)refractory metal
Refractory metal
It often refers to metallic materials with high melting points, particularly tungsten, tantalum, molybdenum, and niobium, and their alloys. If we arrange the elements in order of melting point, we get tungsten (3387°C), rhenium (3180°C), tantalum (2996°C), osmium (2700°C), molybdenum (2610°C), niobium (2468°C), iridium (2447°C), boron (2300°C), ruthenium (2250°C), and hafnium (2150°C). Here, boron is not a metal, but the rest are, and the fact that there are metallic elements with such high melting points is one of the characteristics of metallic elements.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
融点の高い金属材料,とくにタングステン,タンタル,モリブデン,ニオブと,これらの合金をさすことが多い。元素を融点の順に並べてみると,タングステン(3387℃),レニウム(3180℃),タンタル(2996℃),オスミウム(2700℃),モリブデン(2610℃),ニオブ(2468℃),イリジウム(2447℃),ホウ素(2300℃),ルテニウム(2250℃),ハフニウム(2150℃)となる。ここでホウ素は金属ではないが,あとは金属で,このように高融点のものがあるというのは金属元素の一つの特徴である。

出典 株式会社平凡社世界大百科事典 第2版について 情報

<<:  Public forest - Kouyuurin

>>:  Public land policy (English spelling)

Recommend

Nakano Sekiou

A shogunate official in the late Edo period. Comm...

Turtle-like flying wasp - Turtle-like flying wasp

...They mainly parasitize scale insects and psyll...

Giving back - Ongaeshi

[Noun] (suru) To repay a favor received. Giving ba...

Kantharos

A type of high-footed cup used in ancient Greece a...

Lenz, A. (English spelling) LenzA

…This theory was later refuted by the research of...

Body measurement - Body measurement

Measuring the length of each part of a livestock&#...

IRC - IRC

A system for chatting on a network connected by TC...

Sikelianos, A. (English spelling) SikelianosA

…He wrote about the 3,000-year history of the Gre...

Reproduction - Kiyozuri

A printing term referring to the special printing ...

morenosite

…Solubility in water is 131 g/100 g (50 °C). The ...

Odan Tapley - Odan Tapley

…It was during this period that Mahayana Buddhism...

Pseudothemis zonata

Order Odonata, Family Lithoda. A type of dragonfly...

Ichikawa Saigu - Ichikawa Ikki

⇒Ichikawa Kanenori Source: Kodansha Digital Japane...

Binet, Alfred

Born: July 8, 1857, Nice [Died] October 18, 1911. ...

Mount Wilson Observatory

An observatory located on the summit of Mount Wils...