【摘要】 根据分相成核原理，通过一步热处理过程，制备了双掺杂Ｂ＿２Ｏ＿３→Ａｌ＿２Ｏ＿３→ＳｉＯ＿２系统透明玻璃陶瓷。ＸＲＤ分析确定主晶相为莫来石固溶体；分别测定了材料的吸收光谱、发射光谱和荧光寿命，分析讨论了铬和钕格位分布及光谱特点。在双掺杂铬和钕玻璃陶瓷中存在较强的Ｃｒ￣（３＋）→Ｎｄ￣（３＋）的辐射能量传递和非辐射传递，同时也存在Ｃｒ￣（３＋）→Ｃｒ￣（３＋）的能量传递。Ｃｒ￣（３＋）主要位于晶相格位中，Ｎｄ￣（３＋）则全部保留在剩余玻璃相中，Ｃｒ￣（３＋）的格位分布对光谱性能有很大的影响。更多还原

【Abstract】 The transparent glass-ceramics in thesystem of B₂O₃-Al₂O₃-SiO₂ codoped by Cr￣（3+） and Nd￣（3+）were prepared by heat treatment in one step processaccording to the principle of phase segregation,andusing the analytically pure raw materials.The maincrystalline phase checked by XRD is a mullite solidsolution。Absorption,emission spectra and lifetimeof samples were measured.The distribution of sitesfor Cr￣（3+） and Nd￣（3+） in samples and the spectroscopiccharacteristics were analyzed and discussed bycontrasting co-doped samples with singly-dopedones,The absorption spectra of co-doped sample isapproximately equal to the superimposition ofabsorption of singly-doped Cr￣（3+） on that of Nd￣（3+）sample。The intensity of emission at 700 nm for theco-doped sample by 647 nm excitation is only 65%ofthat of singly-doped Cr￣（3+）,and the intensity ofemission at 700 nm and 775 nm by 568 nm excitationare 87%and 70%respectively。 The Nd￣（3+） lifetimeobserved at 1060nm is increased bv 45%due toradiation trapping in the co-doped sample comparedto the sample containing only Nd￣（3+）.This shows thatthere are radiative and nonradiative transfer of energyfron Cr￣（3+） to Nd￣（3+） and there is also energy transferfrom Cr￣（3+） to Cr￣（3+）。Cr￣（3+） ions almost universally favoroctahedral coordination in crystalline phase,andNd￣（3+） would concentrate in the residual glass phase。The distribution of sites for Cr￣（3+） ions will affect onthe spectroscopic characteristics in Cr and Nd dopedglassceramics.更多还原