原料 raw material; crude material; stock; staple; subject; raw stuff; rough material◇原料成本 material cost; 原料处理 material handling; material processing; 原料基地 raw material base area; 原料计价 material valuation; 原料生产 production of material; 原料消耗 raw material consumption; 原料油 raw oil; 原料资源 raw material resources
Study on the synthesis of corundum - mullite - gahnite multiphase materials by one - step sintering process using high purity raw materials showed that the more the content of gahnite in multiphase materials , the high the volume expansion would be introduced in the system , which resulted in the sintering difficulty of the multiphase materials . while the content of gahnite was controlled about 30wt % and the content of mullite was about 70wt % , the densified multiphase materials can be obtained after fired at 1600 or 1700 采用高纯原料一步合成刚玉?莫来石?锌铝尖晶石复相材料研究表明:复相材料中锌铝尖晶石含量越高,则合成锌铝尖晶石时产生的体积膨胀越大,烧结性也就越差;当锌铝尖晶石含量为30wt ,莫来石含量较高为70wt左右时,在1600或1700烧后都能得到显微结构较为致密的复相材料。