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为了弄清楚镨黄陶瓷颜料的生成机理和显色剂,本文主要用差热分析,x—射线衍射,对SiO_2—ZrO_2—Pr_6O_(11)—MoO_3体系(铝镨黄体系)和SiO_2—ZrO_2—Pr_6O_(11)—NaF体系(典型镨黄体系)进行了研究。通过对实验结果的分析,研究,本文认为镨黄颜料的生成机理与SiO_2的转型有关,六方SiO_2在Pr催化下转型为四方SiO_2后在ZrO_2的相变温度(1170℃)条件下与ZrO_2反应生成ZrSiO_4在钼镨黄颜料中,显色剂为ZrSiO_4,在典型镨黄颜料中,显色剂除了ZrSiO_4外还有Pr(Ⅳ)。
In order to clarify the formation mechanism of praseodymium yellow ceramic pigment and the color reagent, this paper mainly uses the differential thermal analysis, x-ray diffraction, the SiO_2-ZrO_2-Pr_6O_ (11) -MoO_3 system (praseodymium yellow system) and SiO_2-ZrO_2- Pr_6O_ (11) -NaF system (typical praseodymium yellow system) was studied. Through the analysis of the experimental results, it is considered that the formation mechanism of praseodymium yellow pigment is related to the transformation of SiO 2. The hexagonal SiO 2 is transformed into tetragonal SiO 2 by Pr catalyzed reaction with ZrO 2 under the phase transformation temperature of ZrO 2 (1170 ℃) In the molybdenum praseodymium yellow pigment, the developer is ZrSiO 4, and in the typical praseodymium yellow pigment, the developer is Pr (Ⅳ) besides ZrSiO 4.