가돌리늄
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가돌리늄 속성
- 녹는점
- 1313 °C (lit.)
- 끓는 점
- 3273 °C (lit.)
- 밀도
- 7.886 g/mL at 25 °C (lit.)
- 인화점
- 3266°C
- 용해도
- soluble in dilute acid solutions
- 물리적 상태
- 잉곳 형태
- 색상
- 실버 화이트
- Specific Gravity
- 7.898
- 비저항
- 126 μΩ-cm, 20°C
- 수용성
- 마그네슘과 희석산에 용해됩니다. 물에 불용성.
- 감도
- Air & Moisture Sensitive
- Merck
- 13,4347
- 노출 한도
- ACGIH: TWA 2 ppm; STEL 4 ppm
OSHA: TWA 2 ppm(5 mg/m3)
NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)
- 안정성
- 안정적인. 분말은 가연성이 높습니다. 강한 산화제, 할로겐, 산과 호환되지 않습니다. 분말은 물이나 습기와 반응할 수 있습니다.
- CAS 데이터베이스
- 7440-54-2(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
위험품 표기 | F,Xi | ||
---|---|---|---|
위험 카페고리 넘버 | 15-36/38 | ||
안전지침서 | 43-7/8-26-Neverusewater. | ||
유엔번호(UN No.) | UN 3208 4.3/PG 3 | ||
WGK 독일 | 3 | ||
RTECS 번호 | LW3850000 | ||
F 고인화성물질 | 1 | ||
TSCA | Yes | ||
위험 등급 | 8 | ||
포장분류 | III | ||
HS 번호 | 2846902015 | ||
유해 물질 데이터 | 7440-54-2(Hazardous Substances Data) | ||
기존화학 물질 | KE-05-0661 |
가돌리늄 C화학적 특성, 용도, 생산
화학적 성질
metal foil, chunks or powder. The powder of gadolinium is highly flammable; incompatible with strong oxidising agents, halogens, acids; and reacts with water or moisture.물리적 성질
Gadolinium is silvery-white, soft, malleable, and ductile with a metallic luster. It is the secondof what is referred to as the dysprosium, subgroup in the middle of the lanthanide seriesof rare-earths. It tarnishes in air, forming the oxide (Gd2O3) on the surface, which flakes offthe surface, exposing a fresh metal that in turn oxidizes.Its melting point is 1,313°C, its boiling point is 3,273°C, and its density is 7.90g/cm3.
Isotopes
There are 39 isotopes of gadolinium. Seven of these are stable. They are: Gd-54, which makes up 2.18% of all the gadolinium found in the Earth’s crust; Gd-55,supplying 14.80%; Gd-156, making up 20.47%; Gd-157, constituting 15.56%; and Gd-158, accounting for 24.85%. In addition, there are two isotopes of gadolinium that areradioactive and with such long half-lives that they still exist in the Earth’s crust. They areregarded as stable isotopes along with the other seven. They are Gd-152 (1.08×10+14years), which exists in just 0.20% in abundance, and Gd-160 (1.3×10+21 years), foundin 21.86% abundance.Origin of Name
Named for the mineral gadolinite, which was named for the French chemist Johann Gadolin.출처
Gadolinium is the 40th most abundant element on Earth and the sixth most abundant ofthe rare-earths found in the Earth’s crust (6.4 ppm). Like many other rare-earths, gadoliniumis found in monazite river sand in India and Brazil and the beach sand of Florida as well asin bastnasite ores in southern California. Similar to other rare-earths, gadolinium is recoveredfrom its minerals by the ion-exchange process. It is also produced by nuclear fission in atomicreactors designed to produce electricity.Characteristics
Gadolinium, unlike most of the rare earths in the dysprosium subgroup, reacts slowlywith water, releasing hydrogen. It is strongly magnetic at low temperatures. Two of its stableisotopes (Gd-155 and Gd-157) have the greatest ability of all natural elements to absorb thermalneutrons to control the fission chain reaction in nuclear reactors. However, few of theseisotopes are found in the ores of gadolinium.용도
Gadolinium’s main use is based on its ability to absorb neutrons, thus making it ideal as aneutron-shielding and neutron-absorbing metal. It is also used as an alloying agent for steel andother metals to make the metals more workable and to be able to withstand low temperatures.Gadolinium is used in the manufacture of electronics and can be combined with yttriumto make garnets used in microwaves. Gadolinium is used as a catalyst to speed up chemicalreactions, and to activate phosphor compounds in TV screens and cast filaments in electricaldevices. It is also used in high-temperature furnaces. Gadolinium is paramagnetic at normalroom temperatures (weaker than ferromagnetic) and becomes strongly ferromagnetic at verycold temperatures.
정의
A ductile malleable silvery element of the lanthanoid series of metals. It occurs in association with other lanthanoids. Gadolinium is used in alloys, magnets, and in the electronics industry. Symbol: Gd; m.p. 1313°C; b.p. 3266°C; r.d. 7.9 (25°C); p.n. 64; r.a.m. 157.25.위험도
The halogens of gadolinium are very toxic, and gadolinium nitrate is explosive. As withmost rare-earths, care should be taken not to inhale fumes or ingest particles of gadolinium.가돌리늄 준비 용품 및 원자재
원자재
준비 용품
가돌리늄 공급 업체
글로벌( 158)공급 업체
공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
---|---|---|---|---|---|
career henan chemical co | +86-0371-86658258 +8613203830695 |
sales@coreychem.com | China | 29888 | 58 |
Hubei xin bonus chemical co. LTD | 86-13657291602 |
linda@hubeijusheng.com | CHINA | 22968 | 58 |
Chongqing Chemdad Co., Ltd | +86-023-6139-8061 +86-86-13650506873 |
sales@chemdad.com | China | 39916 | 58 |
Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418671 +8618949823763 |
sales@tnjchem.com | China | 34571 | 58 |
Shaanxi Dideu Medichem Co. Ltd | +86-029-89586680 +86-18192503167 |
1026@dideu.com | China | 8032 | 58 |
Zhuoer Chemical Co., Ltd | 02120970332; +8613524231522 |
sales@zhuoerchem.com | China | 2905 | 58 |
Henan Alfa Chemical Co., Ltd | +8618339805032 |
alfa4@alfachem.cn | China | 13183 | 58 |
changzhou huayang technology co., ltd | +8615250961469 |
2571773637@qq.com | China | 9817 | 58 |
Alfa Chemistry | |
Info@alfa-chemistry.com | United States | 24072 | 58 |
LEAP CHEM CO., LTD. | +86-852-30606658 |
market18@leapchem.com | China | 24738 | 58 |
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