| 摘要 |
<p>PURPOSE:To obtain an artificial dental rod which possesses the superior erosionproofness and strength by pouring a sol containing aluminium alcoxide as main constituent into a mold having a prescribed shape and solidifying and drying the gel at the stage where the foaming agent concentration in the sol generates a certain distribution and by heating the dry gel over the decomposition temperature of the foaming agent and then carrying out sintering. CONSTITUTION:Into a sol containing aluminium alcoxide as main constituent, a foaming agent having a specific gravity difference to the specific gravity of the sol is added and dispersed, and then said sol is poured into a mold having a prescribed shape, and solidification and drying are performed at the stage in which the foaming agent concentration in the sol is inclined by the specific gravity difference and a certain distribution is generated, and a dry gel is formed. Said dry gel is heated over the decomposition temperature of the foaming agent, and after the foaming agent is decomposed and removed, sintering is carried out. Therefore, the alumina sintered body for artificial dental rod which possesses porosity and fineness can be obtained. Therefore, the adaptability to living body of the artificial dental rod made of alumina can be improved, with the superior dynamic characteristic. Further, since the vacant efficiency distribution of the artificial dental rod can be determined arbitrarily by changing the production conditions, the manufacture of the artificial dental rod which possesses the vacant efficiency proper for the individual is permitted.</p> |
