In this paper, a water-soluble ceramic core with quartz glass powder as the matrix material and K₂CO₃ as the binder was prepared by injection molding process. The effects of sintering temperature on the bending strength, porosity, solubility in water and solubility of the cores from the aluminum alloy castings were studied. The results show that when sintered below the melting temperature of K₂CO₃, the core porosity increases and the shrinkage decreases with the increase of sintering temperature. Instead, when sintered at 900 °C higher than the melting point of K₂CO₃, the core porosity decreases and the shrinkage rate increases. The bending strength of the core decreases with increasing sintering temperature always. Quartz glass and K₂CO₃ in the core promote each other's crystallization transformation and decomposition. The solubility of the core when it contacts with water is mainly affected by the porosity and the reaction products during the sintering process. When the sintering temperature is 800 °C, the two factors are better matched and the core has better comprehensive performance, the bending strength reaches 9.37 MPa and the water solubility and collapse performance is the best.

本文以石英玻璃粉为基体材料，以K ₂ CO ₃为粘结剂，制备了水溶性陶瓷芯。研究了烧结温度对铝合金铸件弯曲强度，孔隙率，水中溶解度和型芯溶解度的影响。结果表明，当烧结温度低于K ₂ CO _3时，随着烧结温度的升高，纤芯孔隙率增加，收缩率降低。相反，当在高于K ₂ CO ₃熔点的900°C烧结时，孔隙率降低，收缩率提高。芯的弯曲强度总是随着烧结温度的升高而降低。石英玻璃和内核中的K ₂ CO ₃促进彼此的结晶转变和分解。核与水接触时的溶解度主要受烧结过程中的孔隙率和反应产物的影响。当烧结温度为800°C时，这两个因素匹配得更好，铁芯具有更好的综合性能，弯曲强度达到9.37 MPa，水溶性和崩塌性能最佳。