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12039-79-1生产厂家

12039-79-1价格

12039-79-1

12039-79-1结构式
12039-79-1结构式
  • 常用中文名:硅化钽
  • 常用英文名:tantalum silicide
  • CAS号:12039-79-1
  • 分子式:Si2Ta
  • 分子量:237.11900
  • 相关类别: 无机化工 无机盐 硅化物及硅酸盐
  • 发布时间:2018-10-01 11:34:18
  • 更新时间:2024-01-11 18:33:34
  • 用作精细陶瓷原料粉。

    用于陶瓷工业以及电接触器和半导体设备。


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中文名 二硅化钽
英文名 Tantalum disilicide
中文别名 二矽化钽
英文别名 bis(λ<sup>2</sup>-silanylidene)tantalum
MFCD00049564
EINECS 234-902-2
密度 9.14
熔点 2200ºC
分子式 Si2Ta
分子量 237.11900
精确质量 236.90200
外观性状 Powder
储存条件 室温
水溶解性 Insoluble in water.
计算化学

1、 氢键供体数量:0

2、 氢键受体数量:0

3、 可旋转化学键数量:0

4、 拓扑分子极性表面积(TPSA):0

5、 重原子数量:3

6、 表面电荷:0

7、 复杂度:18.3

8、 同位素原子数量:0

9、 确定原子立构中心数量: 0

10、 不确定原子立构中心数量:0

11、 确定化学键立构中心数量:0

12、 不确定化学键立构中心数量:0

13、 共价键单元数量:1

更多

1. 性状:为暗灰色立方结晶粉末

2. 密度(g/mL,25℃):9.14

3. 相对蒸汽密度(g/mL,空气=1):未确定

4. 熔点(ºC):2200

5. 沸点(ºC,常压):未确定

6. 沸点(ºC,1mmHg):未确定

7. 折射率:未确定

8. 闪点(ºC):未确定

9. 比旋光度(º):未确定

10. 自燃点或引燃温度(ºC):未确定

11. 蒸气压(20ºC):未确定

12. 饱和蒸气压(kPa,60ºC):未确定

13. 燃烧热(KJ/mol):未确定

14. 临界温度(ºC):未确定

15. 临界压力(KPa):未确定

16. 油水(辛醇/水)分配系数的对数值:未确定

17. 爆炸上限(%,V/V):未确定

18. 爆炸下限(%,V/V):未确定

19. 溶解性:未确定

20.晶格常数:a=0.4778nm,c=0.6558nm

21.显微硬度(kg·mm-2):1407

22.弹性模量(kg·K-1):30230

23.导电率(Ω·cm-1):1.23×10-5

24.比热容(J/(g·℃)):0.33



Section 1: Product Identification
Chemical Name:Tantalum silicide (99.5%-Ta)
CAS Registry Number:12039-79-1
Formula:TaSi2
EINECS Number:234-902-2
Chemical Family:metal silicide
Synonym:Tantalum disilicide

Section 2: Composition and Information on Ingredients
IngredientCAS NumberPercentACGIH (TWA)OSHA (PEL)
Title compound12039-79-1100%10mg/m3(Ta)5mg/m3(Ta)

Section 3: Hazards Identification
Emergency Overview:May be irritating to skin, eyes and mucous membranes.
Primary Routes of Exposure:Ingestion, inhalation.
Eye Contact:May cause slight to mild irritation of the eyes.
Skin Contact:May cause slight to mild irritation of the skin.
Inhalation:Do not breathe dust. Dust may be irritating to the nose, mucous membranes and respiratory tract.
Ingestion:No information is available on the physiological effects of ingestion.
Acute Health Affects:Dust may be irritating to the nose, mucous membranes and respiratory tract.
Chronic Health Affects:No information available on long-term chronic effects.
NTP:No
IARC:No
OSHA:No

SECTION 4: First Aid Measures
Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need
Eye Exposure:
assistance in keeping their eye lids open. Get immediate medical attention.
Wash the affected area with water. Remove contaminated clothes if necessary. Seek medical assistance if
Skin Exposure:
irritation persists.
Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty in
Inhalation:
breathing, coughing, wheezing or pain. In such cases seek immediate medical assistance.
Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce
Ingestion:
vomiting only if directed by medical personnel.

SECTION 5: Fire Fighting Measures
Flash Point:no data
Autoignition Temperature:no data
Explosion Limits:no data
Extinguishing Medium:dry chemical, carbon dioxide, or foam.
If this product is involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure
Special Fire Fighting Procedures:
self-contained breathing apparatus and full protective clothing.
Hazardous Combustion andIf involved in a fire this material may emit irritating dusts.
Decomposion Products:
Unusual Fire or Explosion Hazards: No unusual fire or explosion hazard.

SECTION 6: Accidental Release Measures
Spill and Leak Procedures:Sweep up the material and dispose of properly.

SECTION 7: Handling and Storage
Handling and Storage:Store the material in a sealed container.

SECTION 8: Exposure Controls and Personal Protection
Eye Protection:Always wear approved safety glasses when handling a chemical substance in the laboratory.
Skin Protection:Wear appropriate chemical resistant gloves and protective clothing.
Ventilation:Material may form a fine dust. If possible, handle the material in an efficient fume hood.
If in form of fine dust and ventilation is not available a respirator should be worn. The use of respirators
Respirator:
requires a Respirator Protection Program to be in compliance with 29 CFR 1910.134.
Ventilation:Material may form a fine dust. If possible, handle the material in an efficient fume hood.
Additional Protection:No additional protection required.

SECTION 9: Physical and Chemical Properties
Color and Form:-325 mesh gray pwdr. (avg. 10 microns or less)
Molecular Weight:237.12
Melting Point:2200°
Boiling Point:no data
Vapor Pressure:not applicable
Specific Gravity:9.14
Odor:none
Solubility in Water:insoluble

SECTION 10: Stability and Reactivity
Stability:air and moisture stable
Hazardous Polymerization:No hazardous polymerization.
Conditions to Avoid:formation of a fine dust
Incompatibility:mineral acids
Decomposition Products:none

SECTION 11: Toxicological Information
RTECS Data:No information available in the RTECS files.
Carcinogenic Effects:no data
Mutagenic Effects:no data
Tetratogenic Effects:no data

SECTION 12: Ecological Information
Ecological Information:No information available

SECTION 13: Disposal Considerations
Disposal:Dispose of according to local, state and federal regulations.

SECTION 14: Transportation
Shipping Name (CFR):Non-hazardous
Hazard Class (CFR):NA
Additional Hazard Class (CFR):NA
Packaging Group (CFR):NA
UN ID Number (CFR):NA
Shipping Name (IATA):Non-hazardous
Hazard Class (IATA):NA
Additional Hazard Class (IATA):NA
Packaging Group (IATA):NA
UN ID Number (IATA):NA

SECTION 15: Regulatory Information
TSCA:Listed in the TSCA inventory.
SARA (Title 313):Title compound not listed.
Second Ingredient:none


SECTION 16 - ADDITIONAL INFORMATION
N/A
危害码 (欧洲) Xi
安全声明 (欧洲) S22
WGK德国 3

1.以金属钽和硅粉为原料,将金属钽和硅粉进行粉碎并混合均匀,再将其放入石墨炉内加热至1100~1500℃进行预反应,然后通入氢气,再升温至800℃进行反应,即得硅化钽。或者用氢化钙还原五氧化二钽得到氢化钽,再加热至1800℃得金属钽,然后加入硅粉合成得硅化钽。

2.将Si和Ta混合物先预热至350℃,然后升温至1480℃,加热反应。或令TaS2与SiHnX4-n在900℃下反应制得。

3.直接法 以金属钽和硅粉为原料制备硅化钽,反应式如下。
12039-79-1 preparation首先将金属钽和硅粉进行粉碎并混合均匀,再将其放入石墨炉内加热至
1100~1500℃进行预反应,然后通入氢气,再升温至1800.℃进行均化反应1h,即得硅化钽。

4.五氧化二钽还原法 首先用氢化钙还原五氧化二钽得到氢化钽,再加热至1800℃得金属钽,然后加入硅粉合成得硅化钽。