摘要:
A thermal shock-resistant alumina-mullite composite material and a preparation method thereof which are capable of concurrently obtaining the compactness of the material and a mullite formation. The material is comprised of 4.about.30 weight % of one aluminum silicate selected from the group consisting of kaolinite, silimanite, and kyanite, 75.about.94 weight % of Al.sub.2 O.sub.3 based on the total amount of Al.sub.2 O.sub.3, and 0.5.about.6 weight % of an alkaline earth metal oxide, wherein the weight ratio of the alkaline earth metal oxide to SiO.sub.2 is 1:2.about.1:3. The composition is first sintered at a temperature of 1450.degree..about.1650.degree. C. for 1.about.5 hours, then cooled down to 1000.degree. C., and then crystallized at a temperature of 1200.degree..about.1500.degree. C. for 1.about.20 hours. This composition is usable to a maximum temperature 300.degree. C. as indicated theraml- shock-resistant testing, and is well application to a part subject to wide thermal variation and for which a conventional 85%.about.96% alumina material is not usable.
摘要翻译:能够同时获得材料的致密性和莫来石形成的耐热冲击氧化铝 - 莫来石复合材料及其制备方法。 该材料由4重量%的30重量%的一种选自高岭石,硅锰矿和蓝晶石的硅酸铝组成,基于Al 2 O 3的总量为75重量%的Al 2 O 3和0.5重量%的6重量% 碱土金属氧化物,其中碱土金属氧化物与SiO 2的重量比为1:2差异1:3。 该组合物首先在1450℃1650℃的温度下烧结1小时5小时,然后冷却至1000℃,然后在1200℃的温度下在1500℃下结晶1小时20小时 。 该组合物可用于最高温度300℃,如耐冲击性试验,并且很好地应用于具有宽热变化的部分,并且传统的85%DIFFERENCE 96%氧化铝材料不能使用。
摘要:
A process for modifying a nitride surface includes irradiating energized ion particles onto the nitride surface while blowing a reactive gas directly on the nitride surface under a vacuum condition. An aluminum nitride for a direct bond copper (DBC) can be obtained by forming a thin copper film on the thusly modified nitride.