| 查看: 216 | 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
化工学硕294分，求导师收留
已经有29人回复
-
求调剂
已经有10人回复
-
考研求调剂
已经有13人回复
-
求调剂
已经有3人回复
-
人工智能320调剂08工类还有机会吗
已经有17人回复
-
考研英一数一338分
已经有10人回复
-
求助调剂，跨调
已经有15人回复
-
085600材料与化工329分求调剂
已经有20人回复
-
085600材料与化工349分求调剂
已经有15人回复
-
求调剂
已经有13人回复
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
2楼2008-02-20 17:54:41
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
★ ★
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
