Material of answer photograph pottery and porcelain is to improve data of single-phase pottery and porcelain further the efficient way of mechanical function. Because join many agglomeration auxiliary to be able to be opposite,the function of material of pottery and porcelain brings a lot of adverse effects, accordingly people strive is reduced or do not use agglomeration auxiliary. In this respect, the research of Shanghai silicate place is had representative. To S ｉ C - integral of body of 3 N 4(counts 25% S ｉ ) composite material, they with S ｉ 3 N 4 for combinative appearance, join 2 O of L ａ 3, 2 O of Y 3 wait for a few rare earth accretion, in order to improve the high temperature capability of material. To ｎ of ｏ of ｌ of ａ of ｉ of S of β of 20%(of S ｉ C) (bulk mark) answer photograph material, join A ｌ 2 O 3, A ｌ N, because during agglomeration begins they can regard general agglomeration as auxiliary,form in all brilliant fluid photograph promotes agglomeration, and in agglomeration later period 3 N of they and S ｉ 4 form β - photograph of ｎ of ｏ of ｌ of S ｉ ａ , reason does not form vitreous photograph in crystal boundary, improved the mechanical performance of material of pottery and porcelain with respect to big earth thereby. To Y - (α / ｎ of ｏ of ｌ of ａ of β S ｉ ) material of answer photograph pottery and porcelain, α - dispersion of grain of ｎ of ｏ of ｌ of S ｉ ａ is in acicular β - inside ｎ of ｏ of ｌ of S ｉ ａ , the content of α photograph is about 30% , the content of β photograph is 70%(to issue agglomeration by condition of ａ of 1850 ℃ , 15 MP about 2 ｈ are made) . α / pottery and porcelain of β answer photograph so conspicuous it is not only as a result of its tall compact sex, and because its mechanical function is had,be add and gender and adjustable quality. The bending strength of material of afore-mentioned pottery and porcelain achieves 750 MP ａ , rupture tenacity is achieved 7. 1/2 of ｍ of · of 2 MP ａ , acicular β - grain of ｎ of ｏ of ｌ of S ｉ ａ rose to fill oneself in matrix strong action. CNC Milling