CAJ | 학술논문

利用XRD及Avrami方程对纯熔融石英陶瓷试样N-0与引入3％（w）纳米Nd2 O3的熔融石英试样N-3进行等温析晶动力学过程研究。结果表明：两种试样的析晶机制相同，均为表面结构缺陷所致的不均匀成核类型，两种试样的晶粒生长方式均为二维生长伴随有一维及三维的生长方式，但加纳米Nd2 O3的试样比不加的一维及三维生长程度更大；纳米Nd2 O3的引入减少了熔融石英颗粒表面玻璃结构的“活性成核点”，增加了熔融石英颗粒表面玻璃结构的稳定性，使析晶活化能由未加Nd2 O3的874 kJ·mol-1提高到1270 kJ·mol-1，明显降低了熔融石英的析晶率。
이용XRD급Avrami방정대순용융석영도자시양N-0여인입3％（w）납미Nd2 O3적용융석영시양N-3진행등온석정동역학과정연구。결과표명：량충시양적석정궤제상동，균위표면결구결함소치적불균균성핵류형，량충시양적정립생장방식균위이유생장반수유일유급삼유적생장방식，단가납미Nd2 O3적시양비불가적일유급삼유생장정도경대；납미Nd2 O3적인입감소료용융석영과립표면파리결구적“활성성핵점”，증가료용융석영과립표면파리결구적은정성，사석정활화능유미가Nd2 O3적874 kJ·mol-1제고도1270 kJ·mol-1，명현강저료용융석영적석정솔。
The isothermal crystallization kinetics of pure fused quartz of blank specimen N-0 and specimen N-3 introducing 3 mass% nano-Nd2 O3 were researched by means of XRD and Avrami equation.The re-sults show that crystallization mechanisms of fused quartz in two specimens are both heterogeneous nucle-ation type caused by surface structure defects,and the grain growth modes of two specimens are both two-dimensional growth accompanied by one-dimensional and three-dimensional growths,but specimen N-3 has the higher degree of grain growth in one-dimensional and three-dimensional than specimen N-0;introducing nano-Nd2O3 can obviously reduce the “active nucleation sites”of glass structure on the fused silica particles surface,enhance the stability of glass structure,increase the activation energy of fused quartz crystallization from 874 kJ·mol -1 to 1 270 kJ·mol -1 ,and decrease the crystallization ratio of fused quartz dramatically.