A new type of solid acid was prepared by calcination of titanium sulphate doped with lantha-num oxide. 掺杂了氧化镧的硫酸钛经高温焙烧后制得新型固体酸催化剂。
In the case of the identical mass fraction of the oxide, the grain size of the ceria doped molybdenum alloys was smaller than that of the oxide lanthanum doped molybdenum alloys. 钼合金丝直径相同的条件下，氧化铈掺杂钼合金丝的晶粒尺寸要小于氧化镧掺杂钼合金丝的晶粒尺寸。
