摘要
采用水热法制备了负热膨胀ZrW_(2)O_(8)材料,研究了煅烧温度和冷却方式对合成产物的影响。结果表明:对前驱体进行加热温度处理,在500~700℃能够合成ZrW_(2)O_(8),且600℃时合成的产物结晶度最高;当温度升至800℃,ZrW_(2)O_(8)严重分解。煅烧后的粉末经不同冷却方式处理后,水冷后的结晶度最高,炉冷其次,空冷的结晶度最低;前驱体经600℃煅烧6 h后,水冷冷却得到结晶度最高的ZrW_(2)O_(8),且粉体形状呈长条状和针状。
The negative thermal expansion ZrW_(2)O_(8) materials were prepared by hydrothermal method.The effects of calcination temperature and cooling methods on the synthesized products were investigated.The results show that,the ZrW_(2)O_(8) can be synthesized at 500-700℃,and the crystallinity of the product is the highest when the temperature is at 600℃.When the temperature rises to 800℃,the ZrW_(2)O_(8) is decomposed seriously.The crystallinity of the calcined powder water cooling after is the highest,the crystallinity after furnace cooling is the second,and the crystallinity after air cooling is the lowest.The highest crystallinity is obtained when The precursor is calcined at 600℃for 6 h after water cooling.The shape of powder is long strip and needle shape.
作者
张坚
皮黎飞
赵龙志
李德英
ZHANG Jian;PI Lifei;ZHAO Longzhi;LI Deying(School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China)
出处
《热加工工艺》
北大核心
2022年第16期157-160,共4页
Hot Working Technology
基金
国家自然科学基金项目(51465019)
江西省科技厅科研项目(20151BAB206044)
江西省科技厅科研项目(20153BCB-23005)
江西省教育厅科技项目(KJLD14040)
江西省教育厅科技项目(GJJ150487)。
