High-Temperature Heat Contents of Aluminum Oxide, Aluminum Sulfate, Potassium Sulfate, Ammonium Sulfate and Ammonium Bisulfate1
High-Temperature Heat Contents of Aluminum Oxide, Aluminum Sulfate, Potassium Sulfate, Ammonium Sulfate and Ammonium Bisulfate1
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DOI：
10.1021/ja01217a025
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发表时间：
1945
影响因子：
15
通讯作者：
C. H. Shomate;B. F. Naylor
中科院分区：
文献类型：
--
作者：
C. H. Shomate;B. F. Naylor
矿业局太平洋实验站对从粘土和明矾石制备氧化铝所涉及的许多化合物的热力学性质进行了研究。高温热含量数据对于准确计算高温冶金过程的平衡和热平衡尤其必要。大量实例中缺乏此类数据；因此本文提供了氧化铝、无水硫酸铝、硫酸钾、硫酸铵和硫酸氢铵的数据。方法和材料高温热含量通过先前描述的装置中的“滴”法测定。 3 使用定义的卡路里（1 卡= 4.1833 国际焦耳）对热量计进行电校准。每个样品都封装在铂铑合金胶囊中，其热含量已预先确定。对于氧化铝、硫酸铝和硫酸钾，使用未密封的胶囊，而对于硫酸铵和硫酸氢铵的测量则使用金密封的胶囊。
A study of the thermodynamic properties of many of the compounds involved in the prepara-tion of alumina from clays and alunite has been undertaken at the Pacific Experiment Station of the Bureau of Mines. High-temperature heatcontent data are especially necessary for the ac-curate calculation of equilibria and heat balances for metallurgical processes at elevated tempera-tures. Data of this type are lacking in a large number of instances; accordingly this paper presents such data for aluminum oxide, anhydrous aluminum sulfate, potassium sulfate, ammonium sulfate and ammonium bisulfate. Method and MaterialsThe high-temperature heatcontents were determined by the “drop” method in a previously described apparatus. 3 The calorimeter was electrically calibrated, using the de-fined calorie (1 cal.= 4.1833 Int. joules). Each sample was enclosed in a platinum-rhodium alloy capsule whose heat content had been determined previously. For the aluminum oxide, aluminum sulfate, and potassium sulfate an unsealed capsule was used, while a gold-sealed capsule was employed for the ammoniumsulfate and ammonium bisulfate measurements.