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本文内容分两部分:第一部分,以菱镁矿和滑石为主要原料,研制出一种镁橄榄石瓷料,其线热膨胀系数与4号玻璃和4J50合金基本匹配,并能实现气密封接;第二部分,在研制出M_2SⅡ镁橄榄石瓷料的基础上,采用热压铸工艺研制出供宽带高写录速度示波管管壳用的异形陶瓷部件:120×100×20方框和120×100—φ84×70方锥体瓷件。在研制异形镁橄榄石瓷件的过程中,采用模具恒温、快速排蜡、控制冷却温度等一系列措施,克服了成型→排蜡→烧成过程中的变形、开裂,特别是碎裂难关,成功地实现了号4号玻璃、4J50合金的真空气密封接,制出了密封的管壳。
This article is divided into two parts: In the first part, a kind of forsterite porcelain material is developed with magnesite and talc as the main raw materials, the linear thermal expansion coefficient is basically matched with that of No. 4 glass and 4J50 alloy and can be hermetically sealed; In the second part, based on the M_2SⅡ forsterite porcelain material developed, the special-shaped ceramic parts for the broadband high recording speed oscilloscope tube shell are developed by the hot die-casting process: 120 × 100 × 20 square frame and 120 × 100-φ84 × 70 square cone pieces of porcelain. In the process of developing special-shaped forsterite porcelain pieces, a series of measures such as mold thermostat, rapid wax discharge and controlled cooling temperature are adopted to overcome the deformation, cracking and cracking especially during the forming, Successfully achieved No. 4 glass, 4J50 alloy vacuum hermetic seal, made of a sealed tube.