Zirconium diboride
12045-64-6[B].[B].[Zr]VWZIXVXBCBBRGP-UHFFFAOYSA-N12045-64-6electron density of states
electron density of states
化学的特性ジルコニウムジボライドZrB2は高い融点硬度および耐熱性を持つセラミック材料です航空宇宙工学やエクストリーム環境での使用が考えられており先進材料としての研究が進められています
安全情報は参考情報です。供給元の安全データシート(SDS)、適用法令、専門家による評価に代わるものではありません。
This chemical does not meet GHS hazard criteria for 7.4% (4 of 54) of reports.
Warning
H302 (85.2%): Harmful if swallowed [Warning Acute toxicity, oral]
P261, P264, P270, P271, P280, P301+P317, P302+P352, P304+P340, P317, P321, P330, P362+P364, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 54 reports by companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: Zirconium boride (ZrB2)
REACH registered substance: Zirconium diboride (EC: 234-963-5)
5.0 [mg/m3], as Zr
10.0 [mg/m3], as Zr
12 [mg/m3]
100 [mg/m3]
620 [mg/m3]
Used as a refractory material (aircraft and rockets), high-temperature electrical conductor, and cutting tool coating; [Hawley] Used as a diffusion barrier in semiconductors, a refractory material for molten metals, and an absorbent in nuclear reactors; [Ullmann]
Metal Preparation and Pouring [Category: Foundry]
説明Zirconium diboride (ZrB2) is a highly covalent refractory ceramic material with a hexagonal crystal structure. ZrB2 is known as a UHTC with a melting point of 3246C. This together with its relatively low density of B6.09 g/cm3 (measured density may be higher due to hafnium impurities) and good high-temperature strength makes it a contender for high-temperature aerospace applications, for example, hypersonic flight or rocket propulsion systems. It is an unusual ceramic with relatively high thermal and electrical conductivities.
使用Zirconium boride is use to improve resistance in zirconia-based, carbon-bonded refractories in contact with ferrous melts. Used in nuclear applications, aerospace refractory, in cutting tools and to protect thermocouple tubes. It also used in use of its relatively high conductivity, especially for a ceramic.
現在のフィルター条件では反応記録がありません。
読み込み中…
化学的特性Zirconium boride, also known as zirconium diboride, a gray metallic crystals or powders. Mohs hardness 8, electrical resistivity 9.2 micro-ohm-cm (20°C), excellent thermal shock resistance, poor oxidation resistance above 1100°C. It was attacked very little by cold HCl, more rapidly by HNO3, and is dissolved by aqua regia. It reacts with H2SO4 and is readily attacked by fused alkali hydroxides, carbonates, and disulfides.Zirconium diboride (ZrB2) is a transition metal boride with a hexagonal crystal structure and P6/mmm symmetry. ZrB2 has a combination of metallic, ionic, and covalent bonds. Due to its strong covalent bonds, ZrB2 has a high melting temperature of 3250°C. This melting temperature classifies ZrB2 as an ultra-high temperature ceramic (UHTC). UHTCs have been proposed for use in many different applications due to their high melting temperatures (>3000°C), as well as their high strength and chemical inertness.
化学性质高い融点ZrB2の融点は約3246°Cと非常に高く極端な熱環境下でも使用可能です高硬度この材料は硬く耐摩耗性に優れているため摩耗が激しい状況での使用に適しています優れた耐熱衝撃性急激な温度変化にも耐える能力があり高温から急冷までの繰り返しに強いです