Mg₂V₂O₇ is the most promising candidate for low-temperature co-fired ceramic (LTCC) multilayer devices. Selecting the appropriate precursors strongly requires reliable thermodynamic properties to be defined accurately. In this study, the structural parameters of the Mg₂V₂O₇ at ambient temperature indicate that it is crystallized in space group of P2₁/c. Notably, Mg₂V₂O₇ has low lattice thermal conductivity (k_L) of 4.77, 5.12, and 4.52 W/mK, along the a, b, and c axes, respectively, which originates from the large phonon scattering rate and low phonon group velocity. The α-Mg₂V₂O₇↔β-Mg₂V₂O₇ and β-Mg₂V₂O₇↔γ-Mg₂V₂O₇ polymorphic transitions occur at 743°C and 908°C with enthalpy change of 1.82±0.04 kJ/mol and 1.51±0.04 kJ/mol, respectively. The endothermic effect at 1083°C with an enthalpy change of 26.54±0.26 kJ/mol is related to the congruent melting of γ-Mg₂V₂O₇. In addition, the molar heat capacity of Mg₂V₂O₇ was measured utilizing drop calorimetry at high temperatures. The measured thermodynamic properties were then applied to select precursors for preparing Mg₂V₂O₇ via a solid-state reaction, indicating that the V₂O₅ and Mg(OH)₂ precursors are strongly recommended due to their thermodynamic superiority.

Mg ₂ V ₂ O ₇是低温共烧陶瓷（LTCC）多层器件最有前途的候选材料。选择合适的前体强烈需要准确定义可靠的热力学性质。本研究中，常温下Mg ₂ V ₂ O _{7的结构参数表明其在}P 2 ₁ /c空间群中结晶。值得注意的是，Mg ₂ V ₂ O _7沿a、b和c轴具有低晶格热导率( k _L )，分别为4.77、5.12和4.52 W/mK ，这源于大的声子散射率和低的声子散射率。声子群速度。α-Mg ₂ V ₂ O ₇ ↔β-Mg ₂ V ₂ O ₇和 β-Mg ₂ V ₂ O ₇ ↔γ-Mg ₂ V ₂ O ₇多晶型转变发生在 743°C 和 908°C 并伴有焓变分别为1.82±0.04 kJ/mol和1.51±0.04 kJ/mol。_{1083℃的吸热效应和26.54±0.26 kJ/mol的焓变与γ-Mg 2} V ₂ O ₇的同成分熔化有关。另外，利用滴热法在高温下测量Mg ₂ V ₂ O _{7的摩尔热容。}然后将测量的热力学性质应用于通过固态反应制备Mg ₂ V ₂ O _{7的选择前驱体，表明V 2} O ₅和Mg(OH) ₂前驱体由于其热力学优越性而被强烈推荐。