Nano SiC-BN composite powders were prepared by dissolving analytically pure H3BO3 and CO(NH2)2 with the mole ratio of 1:2.5 in the absolute alcohol, adding 80%
<正>1 ScopeThis standard specifies the classification,technical requirements,test methods,quality appraisal procedure,packing,marking,transportation,storage and
<正>GB/T2275-2007 1Scope This standard specifies the classification,technical requirements,test methods,quality appraisal procedures,marking,packing,transportat
A basic alumina-spinel low cement castables (castables A) and another castables (castables B) with 5% addition of sodium hexametaphosphate were prepared and hea
The importance of purification for aluminum and aluminum alloy casting was outlined. By comparing ceramic foam filters (CFF) in China and overseas, the existing