以滑石、高岭土、氧化铝、氢氧化铝和二氧化硅为原料，采用基础配方（w）：氧化铝17．8％、氢氧化铝4．5％、滑石42．4％、煅烧高岭土22．6％、生高岭土5．7％、二氧化硅7％，分别外加0、25％、35％、45％、55％质量分数的石墨做造孔剂，以PVA为结合剂，经混合、成型后，分别在1250、1300、1350℃保温1 h热处理而制备了适用于汽油机颗粒物捕集器（GPF）的堇青石多孔陶瓷材料，并对该试样进行了XRD和SEM分析、孔径大小和分布、显气孔率以及烧结等性能的研究。结果表明：以石墨为造孔剂，在1300℃保温1 h可以制备出微孔化且孔径大小呈梯度分布的堇青石多孔材料；改变石墨加入量，可以有效控制试样的气孔率、孔径大小及孔径分布，当石墨质量分数为45％左右时，试样的显气孔率最大，抗折强度也较高，综合性能较好。
The basic formulation was 17.8% (in mass,the same hereinafter)Al2O3,4.5% Al(OH)3,42.4%talc,22.6%calcined kaolin,5.7% raw kaolin,7%SiO2.Based on the basic formulation,the porous cordier-ite ceramics for gasoline particulate filter (GPF)were prepared by extra adding graphite as pore forming agent (0,25%,35%,45 and 55%,respectively),PVA as binder,mixing,shaping,and firing at 1 250,1 300 and 1 350 ℃ for 1 h,respectively.The specimens were analyzed by XRD and SEM.The pore size distribu-tion,apparent porosity and sintering properties were researched.The results show that the porous cordier-ite ceramic with gradient distributed micropores can be prepared using graphite as pore forming agent af-ter fired at 1 300 ℃for 1 h;the porosity,pore size and its distribution can be controlled by changing graph-ite addition;when graphite addition is 45%,the ceramics perform good properties including the highest ap-parent porosity and good modulus of rupture.
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