亚微米氧化铝粉体在建筑陶瓷板材中的应用研究

采用建筑陶瓷板的制备工艺,将亚微米氧化铝粉体加入到陶瓷板材坯料中,研究了其对陶瓷板材外观、烧结性能和力学性能的影响。结果表明:在常规的生产条件下,亚微米氧化铝粉体主要以α-Al₂O₃颗粒的形式均匀分布在坯体中,具有较强的增白效果。当氧化铝粉体加入量在15%(质量分数)以内时,陶瓷板材样品的吸水率低于0.1%,烧结致密化程度较高,抗弯强度随加入量增加而提高。当加入量继续增加,吸水率增大,抗弯强度下降。氧化铝粉体加入量为15%(质量分数)时,样品的抗弯强度达到最高值96 MPa,比未外加氧化铝的样品提高了30%。在白度较低的低品质原料中,通过加入亚微米氧化铝粉体可大幅度提高产品的白度和强度,既可减少优质资源的消耗,又能较好地满足陶瓷板材对装饰效果和力学性能的要求。

Application of Submicron Alumina Powder in Architectural Ceramic Plates

Submicron alumina powder(SAP)was added into the green bodies of the architectural ceramic plates by preparation process of building ceramic plate.The effects of SAP on appearance,sintering properties and mechanical property of the ceramic plates were investigated.The results show that SAP is well dispersed in the ceramic bodies and improves the whiteness of ceramic plates effectively.The samples with the dosage of SAP below 15%(mass fraction)have a low water absorption of less than 0.1%and an increasing flexural strength.When SAP dosage is 15%(mass fraction),the flexural strength of the sample reaches 96 MPa,which is 30%higher than that of the sample without alumina.The further increase in the dosage of SAP results in higher water absorption and lower flexural strength.In the low-quality raw materials with low whiteness,the whiteness and strength of the products can is greatly improved by adding submicron alumina powder,which can not only reduce the consumption of high-quality resources,but also better meet the requirements of decorative effect and mechanical properties of ceramic plates.