陶瓷微珠表面包覆金红石相二氧化钛薄膜的工艺研究

Study on Technology with Thin Rutile-TiO_2 Film Covered on Ceramic Microbeads Surfaces

研究了采用均相沉积法在空心陶瓷微珠表面包覆金红石相二氧化钛薄膜的工艺,在SnO2的诱导作用下将锐钛相TiO2转化为金红石相。通过扫描电子显微镜(SEM)和X-射线衍射(XRD)对微珠表面薄膜的微观结构和TiO2晶型进行了观察和测试,结果表明,陶瓷微珠表面包覆了结构致密、包覆均匀的金红石相TiO2薄膜,以此陶瓷微珠作为填料添加在涂料中所得涂层在近红外光区反射比高达77%,较未包覆二氧化钛薄膜陶瓷微珠的涂层高出21%。

The deposition process of thin rutile-TiO2 film covered on ceramic microbeads surfaces by using homoge-neous precipitation method was studied.Induced by SnO2,the anatase-TiO2 in thin film was transformed into the rutile-TiO2 at lower roasting temperature.The morphologies of the ceramic microbeads after deposition by this process were observed by scanning electron microscope（SEM）,and the crystal type was determined by X-ray diffractometer（XRD）.The results indicated that the uniform and compact thin rutile-TiO2 films were obtained on ceramic microbeads surfaces.The reflectance to the near-IR of the coating with the modified ceramic powders as filler was up to 77%,and was higher by 21% than that of the coating with the normal ceramic powders as filler.