为了实现 Ａｌ２ Ｏ３ 和羟基磷灰石（ Ｈ Ａ Ｐ） 的同步烧结， 必须降底 Ａｌ２ Ｏ３ 的烧结温度， 选用具有生物活性和较低熔点的 Ａ/Ｗ 生物玻璃作为 Ａｌ２ Ｏ３ 液相烧结的添加剂， 利用流延成型工艺， 制得了适合流延成型的水基 Ａ/ Ｗ- Ａｌ２ Ｏ３ 浆料及流延膜， 分析了影响浆料及流延成型的各种因素在烧结过程中， 由于玻璃挥发而导致失重， 所以样品的密度受烧结温度和烧结时间的影响， 但在１３００‘ Ｃ 时，１０ｗｔ％ Ａ/ Ｗ-Ａｌ２ Ｏ３ 的烧结密度可达９９１７ ％ 因此在１３００‘ Ｃ 左右可以实现 Ａｌ２ Ｏ３ 和 Ｈ Ａ Ｐ 的同步烧结，使制备具有多孔 Ｈ Ａ Ｐ和 Ａｌ２ Ｏ３ 衬底的多层生物活性植入体成为可能
For the synchronous sinter of Al2O3 and HAP, it is necessary to decrease the sintering temperature of Al2O3 to prevent decomposition of HAP.
A/W bioglass which has low melting point and bioactivity was selected as the liquid phase sintering additive, perfect A/W-Al2O3 slurries and A/W-Al2O3
tapes were fabricated and various factors which havegreat effect on the properties of slurries and the processing of tape casting
were investigated. Because the bioglass evaporates easily at high temperature, the densities of sample are greatly effected by sintering time and temperature.
But the relative density of the samples prepared at 1300℃ can be reached up to 99.17%, therefore, the A/W-Al2O3 and HAP tapes can be sintered
together at low temperature, it is possible to prepare the laminated bioactivity implant with porous bioactive HAP and A/W-Al2O3 substrate.
参考文献
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