J.Technology and Education, Vol.33, No.1, pp.41-46 (2026)
教育論文

授業・学生実験に適した蛍光体セラミックスの短時間合成

 

平 靖之^*

大東文化大学 経営学科（〒355-8501 埼玉県東松山市岩殿560）

*taira@ic.daito.ac.jp

 

Rapid Synthesis of Phosphor Ceramics for Classroom and Student Laboratory Experiments

 

Nobuyuki TAIRA^*

Department of Business Administration, Daito Bunka University
(560 Iwadono, Higashi-matsuyama, Saitama, 355-8501, Japan)

 

(Received May 8, 2026; Accepted May 25, 2026)

 

The microscale chemistry experiments for synthesizing the desired inorganic phosphors AVO3 (A = Rb and Cs) are described. In the experiments, the synthesis was attempted from A2CO3 (A = Rb and Cs) and V2O5 as starting materials, and sample preparation was carried out on a microscale by grinding and mixing. As a result, properly mixed and ground samples exhibited luminescence, and the desired phosphors AVO3 were obtained. During experiments conducted in lectures, when attempting to prepare RbVO3 phosphors on a microscale, some students' samples did not show luminescence. It was found that when the Rb3V5O14 phase, which is different from the target RbVO3 phosphor, was synthesized, the sample did not show luminescence under ultraviolet irradiation. The emission intensity of RbVO3 tended to be higher than that of CsVO3. This is because the hemihydrate CsVO3・0.5H2O was obtained, and it was found that the emission intensity of anhydrous CsVO3 was comparable to or higher than that of RbVO3. These samples will be used as teaching materials for microscale chemistry experiments, and the prospects for improving the experimental method and developing teaching materials will be discussed.

Keywords: Ceramics, Phosphor, Rapid Synthesis, Microscale Experiment