摘要
以天然锆英石为原料,借助失重-差热(TG-DTA)、X射线衍射(XRD)、扫描电镜(SEM)等分析测试方法,对模拟放射性焚烧灰的陶瓷固化进行了初步研究。结果表明,随着模拟放射性焚烧灰掺量的增加,ZrSiO4的分解温度降低。陶瓷固化体的主要晶相及其烧结温度与模拟放射性焚烧灰的掺量有关,当模拟放射性焚烧灰掺量(质量分数)为20%,固化体的较佳烧结温度范围是1230-1290℃,主要晶相为ZrSiO4;当掺量40%,固化体的较佳烧结温度范围是1200-1260℃,主要晶相为ZrSiO4和ZrO2;当掺量60%,固化体的较佳烧结温度范围是1290- 1350℃,主要晶相为ZrO2。
The researches on ceramic immobilization of simulated radioactive incineration ash (SRIA) were carried out using zirconite as materials, by means of Thermogravimetry-Differential Thermal Analysis (TG-DTA) ,X-ray diffraction (XRD) analysis and scanning electron microscope (SEM) analysis. The results indicate that the decomposition temperature of zirconite is decreased along with the increase of addition content of SRIA. The main crystals and sintering temperatures of ceramic forms are related with addition content of SRIA. When the content of SRIA is 20 wt. %, the sintering temperatures of ceramic form is 1230 - 1290℃ ,and its main crystal is zirconite (ZrSiO4); When it reaches 40 wt. %, the sintering temperatures is 1200 - 1260℃, the main crystals are zirconite (ZrSiO4) and zircona (ZrO2) ; When it is 60 wt. %, the sintering temperatures is 1290 - 1350℃, and the main crystal is zircona (ZrO2).
出处
《西南科技大学学报》
CAS
2007年第1期6-11,24,共7页
Journal of Southwest University of Science and Technology
基金
国家自然科学基金-中国工程物理研究院联合基金资助项目(10176025)。
关键词
放射性焚烧灰
锆英石
氧化锆
陶瓷固化
radioactive incineration ash
zirconite
zircona
ceramic immobilization