摘 要:以钾长石、碳酸钾为主要原料, 设计高、中、低 3 种不同钾含量 的配方固相合成白榴石晶体, 探讨 K₂O 的含量对白榴石生成的影响。 通过实验发现, 适当地提高配方中 K2O 的含量对白榴石生成是有利 的, 但当配方中 K₂O 远高于其在白榴石中的理论含量时, 其在高温下 完全熔融成玻璃熔态物质, 没有白榴石晶体的生成; 当 K₂O 的含量为 25.4%, 在 1 250 ℃熔融保温 60 min, 其热膨胀系数为 20.74×10^-6 ℃^-1( 30～700 ℃) , 平均晶粒尺寸为 3 μm。 

关键词: 钾长石; 碳酸钾; 白榴石; 合成

Abstrate: The leucite crystal was synthesized using potassium feldspar and potassium carbonate as main raw materials, which was designed high, medium and low potassium content in three different formulas solid-phase, the leucite growth impacted by K₂O was researched. The experimental results showed that the improved content of K₂O was favorable for leucite. But when the content of K₂O was far higher than in leucite content of the theory, it completely melted into molten glass materials in high temperature and it had no leucite. When the formula K₂O content was 25.4%, melting in 1 250 ℃in 30 min, its calculated coefficients of thermal expansion(30～700 ℃)reached 20.74×10^-6 ℃, and its average cystal size was 3 μm. 

Keywords: potassium feldspar; potassium carbonate; leucite;synthesis