Compact barium zirconate-based composite ceramic and preparation method thereof: Fid-Bau Portal

Compact barium zirconate-based composite ceramic and preparation method thereof

LI SHUJING / QIAO ZHE / LI YUANBING

The invention relates to compact barium zirconate-based composite ceramic and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: burdening barium carbonate, calcium carbonate, zirconium dioxide and titanium dioxide according to the molar ratio of 1: (0.1-0.4): 0.8: 0.2, and mixing to obtain a mixture; keeping the temperature of the mixture at 1100-1300 DEG C for 1-3 hours, crushing and grinding to obtain barium zirconate-based composite ceramic powder; subjecting the barium zirconate-based composite ceramic powder to mechanical pressing molding under the condition of 50-100 MPa, and preparing a barium zirconate-based composite ceramic green body; and heating the barium zirconate-based composite ceramic green body to 1500-1650 DEG C under the conditions of air atmosphere and normal pressure, and keeping the temperature for 3-5 hours to obtain the compact barium zirconate-based composite ceramic. The compact barium zirconate-based composite ceramic is low in production cost, simple in forming and sintering process, low in equipment requirement, low in sintering temperature and short in heat preservation time, and the prepared compact barium zirconate-based composite ceramic is low in porosity and heat conductivity, high in compactness and excellent in mechanical property.

本发明涉及一种致密锆酸钡基复合陶瓷及其制备方法。其技术方案是：按碳酸钡∶碳酸钙∶二氧化锆∶二氧化钛的摩尔比为1∶(0.1～0.4)∶0.8∶0.2配料，混合，得到混合料；将所述混合料于1100℃～1300℃条件下保温1～3小时，破碎，研磨，制得锆酸钡基复合陶瓷粉体；将所述锆酸钡基复合陶瓷粉体在50～100MPa条件下机压成型，制得锆酸钡基复合陶瓷坯体；在空气气氛和常压条件下，将所述锆酸钡基复合陶瓷坯体加热至1500～1650℃，保温3～5小时，制得致密锆酸钡基复合陶瓷。本发明生产成本低、成型及烧结工艺简单、对设备要求低、烧成温度低、保温时间短，所制备的致密锆酸钡基复合陶瓷不仅气孔率和热导率低，且致密度高和力学性能优异。

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