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据海外文献报道,日本东陶公司通过调整配料,生产出低收缩的高强建卫陶瓷。 配料的调整 配料调整为5％～30％重量的长石或陶石、20％以胀硅砂或硅石、40％～70％滑石、15％以下粘土、5％以下熔剂。而最佳配方为10％～20％长石或陶石、10％～20％以下硅砂或硅石、50％～65％滑石、5％～10％粘土和1％～5％熔剂。 所用长石或陶石平均粒度在10μm以下,它烧成时长成长石玻璃体,填置素坯内,提高其致密性。硅砂或硅石在1100～1300 C下起到主骨料的作用,提高强度和降低收缩。滑石平均粒度为7～10μm。在1100～1300 C下生成斜顽火石,也具有骨料作用,同时生成方晶石,填充多孔界面,降低吸水率。粘土具有增大
According to overseas literature reports, Japan’s Toho Corporation produced low-shrinkage, high-strength Jianwei ceramics by adjusting ingredients. Ingredients adjustments Ingredients are adjusted to 5% to 30% by weight of feldspar or pottery stone, 20% to expand siliceous sand or silica, 40% to 70% talc, 15% or less clay, 5% or less flux. The best formula is 10% to 20% feldspar or pottery stone, 10% to 20% silica sand or silica, 50% to 65% talc, 5% to 10% clay, and 1% to 5% flux. The average particle size of feldspar or pottery stone used is less than 10 μm. When it is fired, the stone glass body grows to be long, and it fills the inside of the china to improve the compactness. Silica sand or silica acts as a main aggregate at 1100 to 1300 C, increasing strength and reducing shrinkage. The average particle size of talc is 7-10 μm. At 1100 to 1300 C, oblique energies are generated and aggregates are also produced. At the same time, cristobalite is generated to fill the porous interface and reduce the water absorption. Clay has increased