Locally found Egyptian dolomite, commercial zirconia, and alumina were used to fabricate calcium zirconate-based refractory with improved thermal shock damage resistance. CaZrO₃/MgO (CZM) and CaZrO₃/MgAl₂O₄ (CZS) green compacts were obtained by mixing dolomite, commercial zirconia, and alumina with molar ratios of 1:1.23:0 and 1:1.23:0.59, respectively, and then ball milled for 1 h and uniaxially pressed at 150 MPa. The obtained green compacts were sintered at 1200, 1300, 1500, and 1650 °C for 2 h with a heating rate of 5 °C/min. The phase composition, microstructure, densification parameters, and thermal shock damage resistance of the prepared refractory were investigated. The results showed that CaZrO₃ was present as the predominant phase and c-ZrO₂ as a secondary phase due to the solubility of calcium and magnesium ions in the zirconia lattice structure. CZM1500 and CZS1500 showed a bulk density of 4.05 and 3.8 g/cm³ respectively. Thermal shock damage resistance of CZM samples was greatly improved with the in situ spinel synthesis where CZS1500 was able to withstand 16 cycles before fracturing compared to 10 cycles recorded for CZM1500.

使用当地发现的埃及白云石、商业氧化锆和氧化铝来制造具有改进的抗热震损伤性能的锆酸钙基耐火材料。将白云石、市售氧化锆和氧化铝分别以摩尔比1:1.23:0和1:1.23:0.59混合得到CaZrO 3 /MgO(CZM)和CaZrO 3 /MgAl 2 _O 4 ₍ CZS ₎生坯_。然后球磨1h并在150MPa下单轴压制。将所得生坯在1200、1300、1500和1650℃下烧结2小时，加热速率为5℃/min。研究了制备的耐火材料的相组成、显微结构、致密化参数和抗热震损伤性能。结果表明，CaZrO ₃由于钙和镁离子在氧化锆晶格结构中的溶解度， c-ZrO ₂作为主要相而存在，而c-ZrO 2作为次相。CZM1500和CZS1500的堆积密度分别为4.05和3.8g/cm ³。通过原位尖晶石合成，CZM 样品的抗热震损伤能力得到极大提高，其中 CZS1500 能够在断裂前承受 16 个循环，而 CZM1500 记录的为 10 个循环。