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采用水热法在SiO2-NaOH-Na2CO3-H2O体系中制备了单一晶相麦羟硅钠石(magadiite),研究了晶化时间、晶化温度和初始物料比对制备的影响,并对样品的结构进行表征。结果表明,在初始物料摩尔比为n(SiO2):n(NaOH+Na2CO3):n(H2O)=3:1:100,晶化温度和时间分别为170℃和24h或n(SiO2):n(NaOH+Na2CO3):n(H2O)=5:1:100,晶化温度和时间分别为160℃和36h以及n(SiO2):n(NaOH+Na2CO3):n(H2O)=7:1:100,晶化温度和时间分别为150℃和48h条件下,均可制备单一晶相麦羟硅钠石,H2O和SiO2含量、晶化时间和晶化温度的提高均不利于麦羟硅钠石的结晶。所制备的麦羟硅钠石形态为玫瑰花形且其热稳定性在250℃以下。
The single crystal phase magadiite was prepared by hydrothermal method in SiO2-NaOH-Na2CO3-H2O system. The effects of crystallization time, crystallization temperature and initial material ratio on the preparation were studied. Structure is characterized. The results show that the crystallization temperature and time are 170 ℃ and 24h or n (SiO2): n (SiO2): n (NaOH + Na2CO3): n (H2O) = 3: (NaOH + Na2CO3): n (H2O) = 5: 1: 100, the crystallization temperature and time are 160 ℃ and 36h respectively, 100, the crystallization temperature and time were 150 ℃ and 48h conditions, can prepare a single crystalline phase of quarryllite, H2O and SiO2 content, crystallization time and crystallization temperature are not conducive to the improvement of micasodium slate Of crystallization. The prepared matteinerite has a rosette shape and its thermal stability is below 250 ° C.