Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a formula of high-aluminum ceramic granulation powder with low carbonate content. A traditional high-aluminum granulation powder formula contains more carbonates such as calcium carbonate and strontium carbonate, the carbonates can be decomposed to produce metal oxides and carbon dioxide gas during high-temperature sintering, and when the carbon dioxide gas cannot be discharged in time, internal pores of a sintered product can be formed, product quality is influenced. Therefore, the formula disclosed in the invention adopts a form of not adding carbonate, simultaneously increases the component proportion of silicon dioxide and titanium dioxide, replaces metal oxide generated by carbonate decomposition, enhances the system, and simultaneously increases the component of chromium sesquioxide, so that reaction with aluminum oxide in the sintering process is caused, and a sintering structure with good flattening and compact molecules is formed, and the problem of bubbles in a sintered part is effectively solved.
本发明公开了一种低碳酸盐含量的高铝陶瓷造粒粉配方，传统的高铝造粒粉配方中，含有较多如碳酸钙、碳酸锶等碳酸盐，在高温烧结时，会分解生产金属氧化物和二氧化碳气体，当二氧化碳气体不能及时排出时，就会造成烧结品内部气孔，影响产品质量，因此本配方采用不添加碳酸盐的形式，同时提升如二氧化硅、二氧化钛的成分比例，代替碳酸盐分解所产生的金属氧化物，增强体系，同时增加三氧化二铬的成分，在烧结过程中，能够与氧化铝反应，形成扁平化良好且分子致密的烧结组织，有效改善烧结件内部气泡问题。
The invention discloses a formula of high-aluminum ceramic granulation powder with low carbonate content. A traditional high-aluminum granulation powder formula contains more carbonates such as calcium carbonate and strontium carbonate, the carbonates can be decomposed to produce metal oxides and carbon dioxide gas during high-temperature sintering, and when the carbon dioxide gas cannot be discharged in time, internal pores of a sintered product can be formed, product quality is influenced. Therefore, the formula disclosed in the invention adopts a form of not adding carbonate, simultaneously increases the component proportion of silicon dioxide and titanium dioxide, replaces metal oxide generated by carbonate decomposition, enhances the system, and simultaneously increases the component of chromium sesquioxide, so that reaction with aluminum oxide in the sintering process is caused, and a sintering structure with good flattening and compact molecules is formed, and the problem of bubbles in a sintered part is effectively solved.
本发明公开了一种低碳酸盐含量的高铝陶瓷造粒粉配方，传统的高铝造粒粉配方中，含有较多如碳酸钙、碳酸锶等碳酸盐，在高温烧结时，会分解生产金属氧化物和二氧化碳气体，当二氧化碳气体不能及时排出时，就会造成烧结品内部气孔，影响产品质量，因此本配方采用不添加碳酸盐的形式，同时提升如二氧化硅、二氧化钛的成分比例，代替碳酸盐分解所产生的金属氧化物，增强体系，同时增加三氧化二铬的成分，在烧结过程中，能够与氧化铝反应，形成扁平化良好且分子致密的烧结组织，有效改善烧结件内部气泡问题。
Production formula of calcium-magnesium-salt-free high-aluminum ceramic granulation powder
| Europäisches Patentamt | 2020
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