Several sialon ceramics compositions were synthesized by selecting metal oxides (MOs) in the nanosize range as additives in the oxynitride network. Nanosized precursors, including Si₃N₄, SiO₂, AlN, Al₂O₃, and MO (MO = MgO, CaO, SrO, BaO, Y₂O₃, La₂O₃, CeO₂, Nd₂O₃, Eu₂O₃, Dy₂O₃, Er₂O₃ and Yb₂O₃,) were used in the present study. Probe sonication and spark plasma sintering techniques were used for mixing the powder precursors and subsequent synthesis of sialon ceramics at a relatively low temperature of 1500 °C. Formation of α-sialon (general formula represented by M_m/vSi_12-(m+n)Al_m+nO_nN_16-n) was investigated for m and n values of 1.1 and 0.6, respectively and their structural, morphological, thermal, and mechanical properties were evaluated. The synthesized samples were characterized using X-ray diffractometry and field emission scanning electron microscopy to study the effect of the MOs on the microstructure and resulting densification, hardness, fracture toughness, thermal expansion and thermal conductivity. The sialon samples synthesized using the selected MOs exhibited similar relative densities in the range of 96 to 99% among all the samples and Vickers hardness (H_V10) values, in the range of 15 to 20.8 GPa, depending on the type of MO. However, RE MOs exhibited a higher H_V than AE MOs. Fracture toughness (K_Ic) was ~4 MPa·m^1/2 for most of the samples, but the sample doped with Yb₂O₃ had the highest K_Ic of 6.3 MPa·m^1/2. The thermal conductivity decreased as the atomic number (atomic radii) of the AE increases and in the case of RE exhibited a random tendency. On the other hand, the thermal expansion coefficient increased with increasing atomic radii of the AE, and a mixed trend, with values in the range of 2.63 to 2.83 ppm·K⁻¹_, was observed for RE doped sialon ceramics. These behaviors are attributed to the resulting morphology and structure of alpha sialon comprised of both equiaxed and elongated grains. The properties of these sialon ceramics could be tailored by the proper selection of the suitable precursors and synthesis parameters.

通过在纳米范围内选择金属氧化物（MOs）作为氮氧化物网络中的添加剂，合成了几种sialon陶瓷组合物。纳米级前体，包括Si ₃ N ₄，SiO ₂，AlN，Al ₂ O ₃和MO（MO = MgO，CaO，SrO，BaO，Y ₂ O ₃，La ₂ O ₃，CeO ₂，Nd ₂ O ₃， Eu ₂ O ₃，Dy ₂ O ₃，Er ₂ O ₃和Yb ₂ O ₃，）用于本研究。探针超声处理和火花等离子体烧结技术用于混合粉末前驱体，随后在相对较低的1500°C温度下合成赛隆陶瓷。α-赛隆的形成（通式为M _{m / v} Si _{12-（m + n）} Al _{m + n} O _n N _16-n）的m和n值分别为1.1和0.6，并对其结构，形态，热和机械性能进行了评估。使用X射线衍射仪和场发射扫描电子显微镜对合成的样品进行表征，以研究MOs对微观结构的影响，以及由此产生的致密化，硬度，断裂韧性，热膨胀和导热系数。在所有样品中，使用选定的MO合成的sialon样品具有相似的相对密度，在96％至99％的范围内，维氏硬度（H _V10）值在15至20.8 GPa的范围内，具体取决于MO的类型。但是，RE MOs的H _V比AE MOs高。断裂韧性（K _Ic）为〜4 MPa·m ^1/2对于大多数样品而言，但是掺有Yb ₂ O ₃的样品的最高K _Ic为6.3 MPa·m ^1/2。导热系数随着AE原子序数（原子半径）的增加而降低，而在RE的情况下表现出随机趋势。另一方面，热膨胀系数随着AE的原子半径的增加而增加，并且呈混合趋势，其值在2.63至2.83ppm·K ^-1的范围内_，稀土掺杂的赛隆陶瓷被观察到。这些行为归因于由等轴晶粒和细长晶粒组成的α赛隆的形态和结构。这些赛隆陶瓷的性质可以由合适的前体和合成参数的适当选择来定制。