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纳米二氧化锆:微观世界的多面手
纳米二氧化锆(ZrO₂),从外观上看,它是一种白色的粉末,粒径处于纳米级别的它(50nm, 80-100nm, 300-500nm),却蕴含着巨大的能量。其晶体结构为单斜相,纳米二氧化锆具有良好的力学性能和热稳定性。
在制备方法上,常见的有溶胶 - 凝胶法、水热法、沉淀法等。溶胶 - 凝胶法通过将锆盐在有机溶剂中水解、缩聚形成溶胶,再经过陈化、干燥等步骤得到纳米二氧化锆。水热法则是在高温高压的水溶液中,让锆的化合物发生反应生成纳米二氧化锆。沉淀法是通过向锆盐溶液中加入沉淀剂,使锆离子沉淀下来,再经过后续处理得到纳米二氧化锆。
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