【摘要】 应用湿化学法和低分子有机溶剂分散合成了复合磷酸锆锶钾KxSr( 1 -x) 2 Zr2 (PO4 ) 3(x =0 ,0 2 5 ,0 5 ,0 75 ,1 0 ) (简写KSZP)陶瓷粉体 ,制备了相应的陶瓷。研究了组成、添加剂种类、烧结条件对热膨胀异向性及热膨胀系数的影响 ,实现了用两种组成的互溶来消除热膨胀的异向性。当x =0 5时 ,热膨胀异向性最小且热膨胀系数α接近于零即获得了零膨胀的材料性能更多还原

【Abstract】 K-xSr (1-x)/2 Zr-2(PO-4)-3 (KSZP) (x=0,0^25,0^5,0^75,1^0) powders were synthesized by wet-chemical precipitate method, then ceramics were made.Thermal expansion characteristics of KZr-2(PO-4)-3 and Sr 0^5 Zr-2(PO-4)-3, and their incorporation were analyzed.The effects of compositions on the coefficient of thermal expansion (CTE) and the additives, sintering conditions on the thermal expansion anisotropy (TEA) have been examined.The partial substitution K++/Sr 2+ in K-xSr (1-x)/2 Zr-2(PO-4)-3 allows to minimize the thermal expansion anisotropy (TEA) and to decrease the coefficient of thermal expansion (CTE).As the composition is varied between these two samples, the linear thermal expansion values change from negative to positive.When x=0^5 i.e.K 0^5 Sr 0^25 Zr-2(PO-4)-3 ceramic has a low CTE of 0^8×10 -6 /℃ (MgO as additive) or -0^6×10 -6 /℃ (ZnO as additive), and its curve ΔL/L versus T shows a less pronounced hysteresis phenomenon, suggesting that microcracking is negligible in this materials, especially when ZnO as additive.更多还原