In this study, non-crystalline manganese tetrahydric orthoborate (MnH₄(BO₃)₂) has been synthesized by using MnSO₄.H₂O, NaOH and H₃BO₃ via hydrothermal method. The characterizations of the synthesized compounds have been conducted using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Thermal dehydration studies have been conducted using the thermogravimetric analysis (DTG/TG). From the XRD result, it is confirmed that amorphous manganese borate is synthesized and the corresponding characteristic borate vibration are observed in FTIR spectrum shows. A particle size distribution at the micron scale with partially agglomerated state is observed from SEM images. The thermogravimetric results show that dehydration process occurs between the temperatures of 40–270 °C in one-step reaction with average weight loss of 19.26%. Average activation energies have been determined by using the non-isothermal kinetics methods of Coats-Redfern, Horowitz-Metzger and Van-Krevelen and found as 37.83, 46.54 and 37.88 kJ mol⁻¹, respectively.

中文翻译：

---

非晶态硼酸锰的热脱水动力学

在这项研究中，使用MnSO ₄ .H ₂ O，NaOH和H ₃ BO ₃合成了非晶态四硼酸原硼酸锰（MnH ₄（BO ₃）₂）。通过水热法。已使用X射线衍射（XRD），傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）进行了合成化合物的表征。使用热重分析（DTG / TG）进行了热脱水研究。从XRD结果可以确认，合成了无定形硼酸锰，并且在FTIR光谱图中观察到了相应的特征性硼酸盐振动。从SEM图像观察到具有部分团聚状态的微米级的粒度分布。热重分析结果表明，在一步反应中，脱水过程发生在40–270°C的温度之间，平均失重率为19.26％。^-1。