| 查看: 199 | 回复: 4 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
tyding木虫 (正式写手)
|
[交流]
求助：CuS的晶型转变温度、热分解温度分别是多少？
|
||
| 求助：CuS的晶型有哪些？晶型转变温度、热分解温度分别是多少？希望博学的虫友积极帮助阿！ |
回复此楼» 猜你喜欢
求调剂
已经有6人回复
-
275求调剂
已经有4人回复
-
318求调剂
已经有6人回复
-
305分求调剂（食品工程）
已经有5人回复
-
求调剂院校信息
已经有5人回复
-
一志愿070300浙大化学358分，求调剂！
已经有3人回复
-
一志愿东华大学化学070300，求调剂
已经有5人回复
-
求调剂
已经有5人回复
-
一志愿北京化工大学070300 学硕336求调剂
已经有6人回复
-
考研调剂
已经有3人回复
tyding
木虫 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 4400.8
- 红花: 1
- 帖子: 487
- 在线: 61.1小时
- 虫号: 276120
- 注册: 2006-09-02
- 性别: GG
- 专业: 环境化工
3楼2008-02-20 21:52:50
cjg820
金虫 (正式写手)
- 应助: 1 (幼儿园)
- 金币: 1355.5
- 红花: 1
- 帖子: 648
- 在线: 97.7小时
- 虫号: 254362
- 注册: 2006-05-27
- 性别: GG
- 专业: 有机化工
2楼2008-02-20 17:54:41
mengxiang5992
木虫 (著名写手)
- 应助: 8 (幼儿园)
- 金币: 2217.4
- 散金: 50
- 红花: 3
- 帖子: 1068
- 在线: 444.1小时
- 虫号: 491736
- 注册: 2008-01-07
- 性别: GG
- 专业: 无机材料化学
4楼2008-02-21 07:50:55
cjg820
金虫 (正式写手)
- 应助: 1 (幼儿园)
- 金币: 1355.5
- 红花: 1
- 帖子: 648
- 在线: 97.7小时
- 虫号: 254362
- 注册: 2006-05-27
- 性别: GG
- 专业: 有机化工
★ ★
tyding(金币+2,VIP+0):xiexie
tyding(金币+2,VIP+0):xiexie
|
Your are right. It depends on decomposition conditions. 1. The thermal decomposition of platinum disulfide, platinum monosulfide and cupric sulfide. Biltz, Wilhelm; Juza, Robert. Z. anorg. allgem. Chem. (1930), 190(No. 112), 161-77. Journal language unavailable. Abstract The thermal decompn. of PtS2 PtS and CuS was measured by means of a quartz spiral manometer. A "sulfur valve" was devised to seal the app. by allowing a droplet of S to solidify in a capillary tube. Graphs indicate the following decompn. pressures: For PtS2: 55 mm. at 616°, 120 mm. at 657° , 354 mm. at 691°; for PtS: 55 mm. at 1060°, 115 mm. at 1110°, 330 mm. at 1186°; for CuS: 100 mm. at 460°; 220 mm. at 474°. At temps. above 660°, CuS is completely decompd. into Cu2S and S2. From these data, the following heats of formation are calcd.: Pt + S (rhombic) ® PtS + 16,000 cals.; PtS + S ® PtS2 + 5000 cals.; 2Cu2S+ S2) ® 4CuS + 38,000 cals. These values indicate that the Pt sulfides are more stable than is generally supposed, more stable even than HgS and Ag2S. 2. Thermal decomposition of CuS to Cu1.8S. Shah, Ishwarlal D.; Khalafalla, Sanaa E. Twin Cities Metall. Res. Cent., Bur. Mines, Minneapolis, MN, USA. Metallurgical Transactions (1971), 2(2), 605-6. CODEN: MTGTBF ISSN: 0026-086X. Journal written in English. Abstract When covellite (CuS) was heated in flowing N the reaction is 1.8 CuS ® Cu1.8S + 0.8 S. The data are plotted. From the slopes of the plots the apparent activation energy is 24 ± 2 kcal. In the absence of gas diffusion control, the thermal decompn. of Cu1.8S at 345-400° depends on the initial surface area of the CuS pellet rather than on the receding interface as reported by M. M. Pavlyuchenko and G. I. Saml (1964). |
5楼2008-02-21 17:59:33
40