| 查看: 187 | 回复: 4 | |||
| 当前主题已经存档。 | |||
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
AI 太可怕了，写基金时，提出想法，直接生成的文字比自己想得深远，还有科学性
已经有8人回复
-
有时候真觉得大城市人没有县城人甚至个体户幸福
已经有12人回复
-
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有11人回复
-
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有10人回复
-
同年申请2项不同项目，第1个项目里不写第2个项目的信息，可以吗
已经有9人回复
-
表哥与省会女结婚，父母去帮带孩子被省会女气回家生重病了
已经有7人回复
-
天津大学招2026.09的博士生，欢迎大家推荐交流（博导是本人）
已经有9人回复
-
有院领导为了换新车，用横向课题经费买了俩车
已经有10人回复
cjg820
金虫 (正式写手)
- 应助: 1 (幼儿园)
- 金币: 1354.5
- 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
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: 1354.5
- 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