MnCO₃ particles were thermally decomposed to obtain Mn₂O₃ particles. MnCO₃ was prepared by co-precipitation method using MnCl₂.4H₂O and CO(NH₂)₂ as reactants. Two separate parts of the obtained MnCO₃ were calcined at 450 °C and 550 °C. The structural, crystallographic, morphological properties and elemental composition of all the materials were investigated using Fourier transform infrared spectrometry (FTIR), X-ray diffraction analysis (XRD), scanning electron microscopy and energy-dispersive X-rays spectroscopy (EDX). FTIR spectrum of the precursor and calcined products was related to MnCO₃ and Mn₂O₃, respectively. As per XRD study, the precursor and calcined product obtained at 550 °C was crystalline, while the product obtained at 450 °C was amorphous in nature. From topographic study, the particles of MnCO₃ and Mn₂O₃ were of cuboid shape. Elemental analysis of the samples via EDX analysis confirmed that the weight and atomic percentages of the precursor and calcined products are related to MnCO₃ and Mn₂O₃, respectively. Afterward, the calcined products were used for investigation of their humidity sensing behavior at room temperature. The product obtained at 550 °C demonstrated reproducible, highly sensitivity and stable response toward humidity having response and recovery time 3 s and 13 s, respectively. Percent sensitivity of this material increased up to 96% by varying the humidity from 35 to 96%. The sensing mechanism was suggested to be based on protonic model, wherein the generation of H⁺ ions due to the dissociation of H₃O⁺ ions reduces the sensor resistance and enhances the humidity sensitivity.

MnCO ₃颗粒被热分解以获得Mn ₂ O ₃颗粒。使用MnCl ₂ .4H ₂ O和CO(NH ₂ ) ₂作为反应物，通过共沉淀法制备MnCO ₃。获得的MnCO _{3 的}两个独立部分在450℃和550℃下煅烧。使用傅里叶变换红外光谱 (FTIR)、X 射线衍射分析 (XRD)、扫描电子显微镜和能量色散 X 射线光谱 (EDX) 研究了所有材料的结构、晶体学、形态学性质和元素组成。前驱体和煅烧产物的 FTIR 光谱与 MnCO ₃相关和Mn ₂ O ₃，分别。根据 XRD 研究，在 550 °C 下获得的前体和煅烧产物是结晶的，而在 450 °C 下获得的产物本质上是无定形的。从形貌研究来看，MnCO ₃和Mn ₂ O ₃颗粒呈长方体形状。通过 EDX 分析对样品进行元素分析证实前体和煅烧产物的重量和原子百分比与 MnCO ₃和 Mn ₂ O _{3 有关}， 分别。然后，将煅烧产品用于研究它们在室温下的湿度传感行为。在 550 °C 下获得的产品表现出可重复性、高灵敏度和对湿度的稳定响应，响应时间和恢复时间分别为 3 秒和 13 秒。通过将湿度从 35% 改变到 96%，这种材料的灵敏度百分比提高到 96%。有人建议所述感测机构是基于质子模型，其中，H的生成⁺离子由于H的解离₃ ö ⁺离子降低了传感器电阻，提高了湿度的灵敏度。