Nanocomposites of LiZrO2 – LiBaZrO3: xMn2+ (x = 0–0.06 molar ratios) were prepared by the co-precipitation method. The prepared samples were characterized by X-ray diffraction (XRD), UV-visible spectrometry, photoluminescence (PL), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX) techniques. Analysis of XRD data shows two phases: the cubic phase of BaZrO3 perovskite and the tetragonal phase of ZrO2. Mn2+ ions were predominantly distributed in the tetrahedral sites and a few ions are situated at the octahedral sites of the composites. UV-visible spectroscopy of these samples presents two optical band energies, decreasing exponentially with increasing concentration of the Mn2+ ion. PL spectra of Mn2+-doped samples display three broad emission bands: a band centered at wavelength,λ =416 nm (blue), another with peak maximum atλ =527 nm (green) and the third (with relatively the lowest intensity) at about 600 nm (orange-red). The blue (λ =416 nm) band was dominant at low Mn2+ concentrations (x≤0.03) but the green band (λ =527 nm) became dominant at higher Mn2+ concentrations (x>0.03). The CIE coordinates revealed colour changes from blue to green at a concentration of 0.05 mole ratio and white light at 0.06 mole ratio. The phosphor presented in this work is a promising material for use in display devices such as flat panel displays, colour plasma displays, signage lights and backlights.

中文翻译：

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掺杂Mn2+离子的LiZrO2-LiBaZrO3纳米复合材料的结构解析和光学性质

LiZrO2 – LiBaZrO3: xMn2+（x = 0-0.06 摩尔比）的纳米复合材料通过共沉淀法制备。制备的样品通过 X 射线衍射 (XRD)、紫外-可见光谱、光致发光 (PL)、扫描电子显微镜 (SEM) 和能量色散 X 射线光谱 (EDX) 技术进行表征。XRD 数据分析显示两个相：BaZrO3 钙钛矿的立方相和 ZrO2 的四方相。Mn2+ 离子主要分布在四面体位置，少数离子位于复合材料的八面体位置。这些样品的紫外-可见光谱呈现出两个光带能量，随着 Mn2+ 离子浓度的增加呈指数下降。Mn2+ 掺杂样品的 PL 光谱显示三个宽发射带：以波长为中心的带，λ = 416 nm（蓝色），另一个峰值在λ = 527 nm（绿色），第三个（强度相对最低）在约600 nm（橙红色）。蓝色 (λ = 416 nm) 带在低 Mn2+ 浓度 (x≤0.03) 下占主导地位，但绿色带 (λ =527 nm) 在高 Mn2+ 浓度 (x>0.03) 下占主导地位。CIE 坐标显示颜色从蓝色变为绿色，浓度为 0.05 摩尔比，白光浓度为 0.06 摩尔比。这项工作中提出的荧光粉是一种很有前途的材料，可用于显示设备，如平板显示器、彩色等离子显示器、标牌灯和背光。03) 但绿带 (λ = 527 nm) 在较高 Mn2+ 浓度 (x>0.03) 时占主导地位。CIE 坐标显示颜色从蓝色变为绿色，浓度为 0.05 摩尔比，白光为 0.06 摩尔比。这项工作中提出的荧光粉是一种很有前途的材料，可用于显示设备，如平板显示器、彩色等离子显示器、标牌灯和背光。03) 但绿带 (λ = 527 nm) 在较高 Mn2+ 浓度 (x>0.03) 时占主导地位。CIE 坐标显示颜色从蓝色变为绿色，浓度为 0.05 摩尔比，白光浓度为 0.06 摩尔比。这项工作中提出的荧光粉是一种很有前途的材料，可用于显示设备，如平板显示器、彩色等离子显示器、标牌灯和背光。