干法渗透陶瓷坯体的制备及其性能研究

主要采用水磨钾长石、56砂、水磨石粉、龙岩球土、水洗球土、硅酸锆等为主要原料,通过正交实验优化配方。以外加的方式探究了助红剂对面料各性能的影响。实验结果表明,当选面料最优配方组合,外加助红剂2.0时所制备的面料与原厂底料相匹配,结合性能良好。此时面料红度值为11.74,收缩11.70%,膨胀系数9.0207×10^(-6)/℃。

干法喷墨渗透陶瓷砖的研究

以应山水磨料、水磨石粉、水磨钾长石粉、C56砂、水洗球土为面料原料,以精选钠石粉、水磨石粉、韶关球土、YS18球土、水洗球土、黑滑石、C56砂、高白膨润土为坯体原料,采用二次布料成形,研究了浆料性能、粉料性能、压砖机成形工序、干燥窑、釉线及窑炉烧成对干法喷墨渗透陶瓷砖质量的影响。结果表明:渗透面料浆料的密度为1.63～1.67g/cm3,流速为40～60s时,喷出的粉料水分控制在6.5%～7.0%范围,粉料多成球形颗粒,流动性好,极少出现分层、面裂、布料不均等缺陷;面料层布料厚度为1.5～1.8mm,成本适中,且不易出现露底的缺陷。

Liquid penetration of freeze-drying and air-drying wood of plantation Chinese fir

A comparative study was conducted on liquid penetration of the freeze-drying and air-drying sapwood and heartwood lumber of plantation Chinese fir （Cunninghamia lanceolata）. The maximum amount of dyeing solution uptake by the capillary rise method was used to evaluate the liquid penetration properties of the treated wood. The pit aspiration ratio was determined by semithin section method. Changes in wood microstructure were investigated using scanning electron microscopy. The results showed that compared with air drying, the freeze drying had a significant effect on liquid penetration of sapwood and heartwood of Chinese fir. The liquid penetration of sapwood is significantly higher than that of the heartwood for both drying treatments. Low pit aspiration ratio and cracks of pits membrane of some bordered pits are the main reasons for increasing liquid penetration after freeze drying treatment.