Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of alumina ceramic material with low dielectric constant and high bending strength
The invention relates to a preparation method of an alumina ceramic material with low dielectric constant and high bending strength, and belongs to the field of ceramic material preparation, the preparation method comprises the following preparation steps: (1) using calcium nitrate tetrahydrate, aluminum nitrate nonahydrate, boric acid, tetraethoxysilane, dilute nitric acid, ethanol and deionized water as raw materials, preparing gel by a sol-gel method, and drying; (2) heating the dry gel at 600 DEG C to obtain glass powder, and grinding the glass powder; (3) mixing and ball-milling the glass powder and alumina powder, and performing tape casting and isostatic pressing to obtain a green tape; and (4) sintering the green tape at 850-900 DEG C to obtain the low temperature co-fired (LTCC) aluminum oxide ceramic. The CaO-B2O3-SiO2-Al2O3 glass powder prepared by a sol-gel method is innovatively adopted as a sintering aid to reduce the sintering temperature of the aluminum oxide ceramic, and the good microwave dielectric property of aluminum oxide and the low melting point of the sintering aid are combined, so that the prepared aluminum oxide ceramic material has the advantages of low sintering temperature, high temperature resistance, high temperature resistance and the like. The mechanical property is high; and the dielectric constant in a high-frequency band is low.
本发明涉及一种低介电常数、高弯曲强度的氧化铝陶瓷材料的制备方法，属于陶瓷材料制备领域，包括如下制备步骤：(1)将四水硝酸钙、九水硝酸铝、硼酸、正硅酸乙酯、稀硝酸、乙醇、去离子水作为原料，采用溶胶凝胶方法制成凝胶，并烘干；(2)将干凝胶在600℃加热，获得玻璃粉，并研磨；(3)将上述玻璃粉与氧化铝粉混合球磨，经流延、等静压后做成生瓷带；(4)将生瓷带在850‑900℃下烧结，得到低温共烧(LTCC)氧化铝陶瓷。本发明创新采用一种溶胶凝胶方法制备的CaO‑B2O3‑SiO2‑Al2O3玻璃粉作为助烧剂以降低氧化铝陶瓷的烧结温度，结合了氧化铝良好的微波介电性能以及烧结助剂的低熔点，制备出的氧化铝陶瓷材料具有低烧结温度，高力学性质和在高频段的低介电常数。
Preparation method of alumina ceramic material with low dielectric constant and high bending strength
The invention relates to a preparation method of an alumina ceramic material with low dielectric constant and high bending strength, and belongs to the field of ceramic material preparation, the preparation method comprises the following preparation steps: (1) using calcium nitrate tetrahydrate, aluminum nitrate nonahydrate, boric acid, tetraethoxysilane, dilute nitric acid, ethanol and deionized water as raw materials, preparing gel by a sol-gel method, and drying; (2) heating the dry gel at 600 DEG C to obtain glass powder, and grinding the glass powder; (3) mixing and ball-milling the glass powder and alumina powder, and performing tape casting and isostatic pressing to obtain a green tape; and (4) sintering the green tape at 850-900 DEG C to obtain the low temperature co-fired (LTCC) aluminum oxide ceramic. The CaO-B2O3-SiO2-Al2O3 glass powder prepared by a sol-gel method is innovatively adopted as a sintering aid to reduce the sintering temperature of the aluminum oxide ceramic, and the good microwave dielectric property of aluminum oxide and the low melting point of the sintering aid are combined, so that the prepared aluminum oxide ceramic material has the advantages of low sintering temperature, high temperature resistance, high temperature resistance and the like. The mechanical property is high; and the dielectric constant in a high-frequency band is low.
本发明涉及一种低介电常数、高弯曲强度的氧化铝陶瓷材料的制备方法，属于陶瓷材料制备领域，包括如下制备步骤：(1)将四水硝酸钙、九水硝酸铝、硼酸、正硅酸乙酯、稀硝酸、乙醇、去离子水作为原料，采用溶胶凝胶方法制成凝胶，并烘干；(2)将干凝胶在600℃加热，获得玻璃粉，并研磨；(3)将上述玻璃粉与氧化铝粉混合球磨，经流延、等静压后做成生瓷带；(4)将生瓷带在850‑900℃下烧结，得到低温共烧(LTCC)氧化铝陶瓷。本发明创新采用一种溶胶凝胶方法制备的CaO‑B2O3‑SiO2‑Al2O3玻璃粉作为助烧剂以降低氧化铝陶瓷的烧结温度，结合了氧化铝良好的微波介电性能以及烧结助剂的低熔点，制备出的氧化铝陶瓷材料具有低烧结温度，高力学性质和在高频段的低介电常数。
Preparation method of alumina ceramic material with low dielectric constant and high bending strength
一种低介电常数、高弯曲强度的氧化铝陶瓷材料的制备方法
NI YIQUN (Autor:in) / WEN WEIJIA (Autor:in) / ZHUO WEIZHUANG (Autor:in)
29.12.2023
Patent
Elektronische Ressource
Chinesisch
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