摘要
以黑龙江石墨尾矿为主要原料,辅以适量的石英和高岭土,采用压制成型法,制备烧结陶瓷砖。研究了烧成温度对陶瓷砖性能的影响。结果表明,当原料含水率为6%～8%、成型压力为25 MPa,烧成温度1060～1080℃时,制得的陶瓷砖为暗红色,颜色一致性好,强度较高,符合国家标准GB/T 4100-2006。当烧成温度为1060℃时,抗折强度最大,高达68.90 MPa,吸水率为0.306%。扫描电子显微镜、热重-差热和X射线衍射等方法分析结果表明,烧成温度为950℃左右时开始析出钙长石,1050℃左右时有大量的液相产生,钙长石和玻璃相对其成瓷及强度的提高起到了重要作用。
Sintered ceramic tiles were prepared from the graphite tailings from Heilongjiang province,China.A proper amount of quartz and kaolin were added to the raw material to improve the properties of the ceramic tiles which were formed by pressing method.The influence of sintering temperature on properties of ceramic tiles was investigated.The results showed that the ceramic tiles possessed good color consistency and higher strength when the tiles were made with the raw materials containing 6%~8% of water,through pressing forming under 25 MPa and sintering at 1060 ~1080 ℃.The tiles are well conformed to the requirements of the national standard GB/T 4100-2006.The ceramic tiles have the highest strength when the firing temperature is 1060 ℃.Its bending strength and water absorptivity are 68.90 MPa and 0.306%,respectively.The investigations with scanning electron microscope（SEM）,thermogravimetric-differential thermal analysis（TG–DTA）,and X-ray diffraction（XRD） shows that the anorthite begins to crystallize at about 950 ℃ and liquid appears at about 1050 ℃.The anorthite and glass phase are important to the sintering and strengthening of the ceramic tiles.
出处
《非金属矿》
CAS
CSCD
北大核心
2011年第6期45-47,共3页
Non-Metallic Mines
关键词
石墨尾矿
陶瓷砖
烧成温度
graphite tailings ceramic tiles sintering temperature
