In this study, copper hydroxide sulfate (Cu₄(OH)₆SO₄) was synthesized by chemical precipitation using CuSO₄ as the precursor material and the first time borax as basic precipitating agent. The synthesized samples were characterized using XRD, FTIR, and SEM. The decomposition kinetics of Cu₄(OH)₆SO₄ were examined by the thermoanalytical procedures. It was obtained from TG‐DTG data that Cu₄(OH)₆SO₄ has two‐region decomposition at elevated temperatures. Kinetic parameters of these regions were calculated by using both the model‐fitting and model‐free methods. In the decomposition of copper hydroxy sulfate, the mean activation energy for first region was calculated as 90.88 kJ mol⁻¹ from KAS method and 91.47 kJ mol⁻¹ from FWO method. The mean activation energy for the second region was 207.20 kJ mol⁻¹ from KAS and 213.34 kJ mol⁻¹ from FWO. The activation energies for first and second regions were obtained from Ortega method as 56.3 and 198.3 kJ mol⁻¹, respectively.

中文翻译：

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化学沉淀法合成硫酸铜（Cu4（SO4）（OH）6）的合成，表征及热分解动力学

在这项研究中，硫酸铜氢氧化物（Cu ₄（OH）₆ SO ₄）是通过化学沉淀法合成的，以CuSO ₄为前驱体材料并首次使用硼砂作为碱性沉淀剂。使用XRD，FTIR和SEM对合成的样品进行表征。通过热分析程序检查了Cu ₄（OH）₆ SO ₄的分解动力学。从TG-DTG数据可以得出Cu ₄（OH）₆ SO ₄在高温下有两个区域分解。通过使用模型拟合和无模型方法计算这些区域的动力学参数。在羟基硫酸铜的分解中，通过KAS方法计算的第一区域的平均活化能为90.88 kJ mol ^-1，通过FWO方法计算为91.47 kJ mol ^-1。来自KAS的第二区域的平均活化能为207.20 kJ mol ^-1，来自FWO的为213.34 kJ mol ^-1。通过Ortega方法获得的第一和第二区域的活化能分别为56.3和198.3 kJ mol ^-1。