텅스텐(IV) 셀레나이드
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텅스텐(IV) 셀레나이드 속성
- 밀도
- 9.32
- RTECS 번호
- YO7714000
- 물리적 상태
- 분말, 10μm
- 색상
- gray hexagonal, hexane crystals, crystalline
- 수용성
- 물에 불용성.
- 노출 한도
- ACGIH: TWA 0.2 mg/m3; TWA 3 mg/m3
NIOSH: IDLH 1 mg/m3; TWA 5 mg/m3; TWA 0.2 mg/m3; STEL 10 mg/m3
- CAS 데이터베이스
- 12067-46-8(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
| 유엔번호(UN No.) | UN3283 - class 6.1 - PG 3 - EHS - Selenium compound, solid, n.o.s., HI: all (not BR) | ||
|---|---|---|---|
| TSCA | Yes | ||
| 위험 등급 | 9 | ||
| 기존화학 물질 | KE-35007 | ||
| 유해화학물질 필터링 | 97-1-134 | ||
| 함량 및 규제정보 | 물질구분: 유독물질; 혼합물(제품)함량정보: 셀레늄 또는 그 화합물과 셀렌화합물을 1% 이상 함유한 혼합물 |
텅스텐(IV) 셀레나이드 C화학적 특성, 용도, 생산
화학적 성질
-325 mesh black powder(s); dry, solid lubricant with exceptional stability at high temperatures, and in high vacuum; used in the form of 99.8% pure material as a sputtering target to produce lubricant films [HAW93] [CER91] [AES93]용도
Tungsten(IV) selenide is used as an important compound in electrochemical solar cells. It acts as a stable semiconductor.정의
Lamellarstructured, dry, solid lubricant with exceptionally high temperature and high vacuum stability. Retains its lubricity to temperatures as low as ?265C.위험도
TLV: 5 mg(W)/m3.Structure and conformation
Tungsten diselenide, WSe2, has a hexagonal crystalline structure comparable to MoS2. Every tungsten atom is covalently bonded to six selenium ligands in a trigonal prismatic coordination sphere, and each selenium is bonded to three tungsten atoms in a pyramidal geometry. Heating thin films of tungsten under pressure from gaseous selenium and high temperatures ( . 527℃/800K) using the sputter deposition technique leads to the films crystallizing in hexagonal structures with the correct stoichiometric ratio.W+ 2Se→WSe2
텅스텐(IV) 셀레나이드 준비 용품 및 원자재
원자재
준비 용품
텅스텐(IV) 셀레나이드 공급 업체
글로벌( 120)공급 업체
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| career henan chemical co | +86-0371-86658258 +8613203830695 |
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| Henan Alfa Chemical Co., Ltd | +8618339805032 |
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2571773637@qq.com | China | 9827 | 58 |
| Alfa Chemistry | |
Info@alfa-chemistry.com | United States | 24072 | 58 |
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