Glass‐ceramics in the tungsten‐titanium‐phosphate system were first reported in 1992. The glass‐ceramics exhibited electrical resistivity as low as log(ρ) = −1.8 Ω·cm, which was attributed to an interconnecting network of tungsten suboxide crystals, WO_3−x. A new identification of the conducting phase as a phosphate tungsten bronze, (PO₄)₂(WO₃)_2m, is reported. High‐temperature x‐ray diffraction and electron microscopy have been used to provide a detailed description of the crystalline phases and their development. As the ceramming temperature was raised, the phase assemblage progressed from cubic tungsten oxide and titanium pyrophosphate to phosphate tungsten bronzes. The m‐values of the bronzes ranged from 2 to 7 depending on composition.

中文翻译：

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钨钛磷酸盐玻璃陶瓷导电相的新鉴定

钨钛磷酸盐体系中的玻璃陶瓷最早于1992年报道。玻璃陶瓷的电阻率低至log（ρ）= -1.8Ω·cm，这归因于低氧化钨晶体的互连网络， WO _{3- x}。导电相的新识别为磷酸钨青铜（PO ₄）₂（WO ₃）_2m，已报告。高温X射线衍射和电子显微镜已被用来详细描述结晶相及其发展。随着陶瓷温度的升高，相组装从立方氧化钨和焦磷酸钛发展为磷酸钨青铜。青铜的m值范围从2到7，具体取决于成分。