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High-Q-value lithium titanate-based microwave dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses a high-Q-value lithium titanate-based microwave dielectric ceramic material and a preparation method thereof. The preparation method comprises the following steps: subjecting Li2CO3 and TiO2 to burdening, ball milling, drying and sieving according to a stoichiometric formula Li2TiO3 and then performing presintering at a temperature of 800-1000 DEG C; adding an M doping agent, carrying out ball milling, drying, sieving and granulating successively, and conducting pressing to obtain a green body; and sintering the green body at a temperature of 1100-1180 DEG C. The chemical formula of the obtained high-Q-value lithium titanate-based microwave dielectric ceramic material is Li<2>TiO<3+x>M, wherein M is Li2CO3, MgO, LiF, MgF2 or MgO + LiF, and x is equal to 0.6 wt.%-3.6 wt.%. According to the invention, different types of dopants are introduced into Li2TiO3, so the sintering characteristic of microwave dielectric ceramic is improved, and the defect that the Qf value of pure Li2TiO3is low is overcome; the produced material has a high quality factor and a moderate dielectric constant; a preparation process is simple; and microwave dielectric devices manufactured, researched and developed on the basis of the material have wide application prospects.
本发明属于陶瓷材料技术领域，公开了一种高Q值钛酸锂基微波介质陶瓷材料及其制备方法，将Li2CO3和TiO2按化学计量式Li2TiO3进行配料，球磨、烘干、过筛后于800～1000℃预烧；添加M掺杂剂，球磨、烘干、过筛后造粒，压制成生坯；生坯于1100～1180℃烧结；所得高Q值钛酸锂基微波介质陶瓷材料的化学式为Li2TiO3+xM，其中M为Li2CO3、MgO、LiF、MgF2或MgO+LiF，x＝0.6wt.％～3.6wt。本发明通过向Li2TiO3中引入不同种类的掺杂剂，改善微波介质陶瓷的烧结特性，克服纯项Li2TiO3Qf值较低的缺点，该材料制品具有较高的品质因数，同时兼具适中的介电常数，并且制备工艺简单，由其制作研发的微波介质器件具有广泛的应用前景。
High-Q-value lithium titanate-based microwave dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses a high-Q-value lithium titanate-based microwave dielectric ceramic material and a preparation method thereof. The preparation method comprises the following steps: subjecting Li2CO3 and TiO2 to burdening, ball milling, drying and sieving according to a stoichiometric formula Li2TiO3 and then performing presintering at a temperature of 800-1000 DEG C; adding an M doping agent, carrying out ball milling, drying, sieving and granulating successively, and conducting pressing to obtain a green body; and sintering the green body at a temperature of 1100-1180 DEG C. The chemical formula of the obtained high-Q-value lithium titanate-based microwave dielectric ceramic material is Li<2>TiO<3+x>M, wherein M is Li2CO3, MgO, LiF, MgF2 or MgO + LiF, and x is equal to 0.6 wt.%-3.6 wt.%. According to the invention, different types of dopants are introduced into Li2TiO3, so the sintering characteristic of microwave dielectric ceramic is improved, and the defect that the Qf value of pure Li2TiO3is low is overcome; the produced material has a high quality factor and a moderate dielectric constant; a preparation process is simple; and microwave dielectric devices manufactured, researched and developed on the basis of the material have wide application prospects.
本发明属于陶瓷材料技术领域，公开了一种高Q值钛酸锂基微波介质陶瓷材料及其制备方法，将Li2CO3和TiO2按化学计量式Li2TiO3进行配料，球磨、烘干、过筛后于800～1000℃预烧；添加M掺杂剂，球磨、烘干、过筛后造粒，压制成生坯；生坯于1100～1180℃烧结；所得高Q值钛酸锂基微波介质陶瓷材料的化学式为Li2TiO3+xM，其中M为Li2CO3、MgO、LiF、MgF2或MgO+LiF，x＝0.6wt.％～3.6wt。本发明通过向Li2TiO3中引入不同种类的掺杂剂，改善微波介质陶瓷的烧结特性，克服纯项Li2TiO3Qf值较低的缺点，该材料制品具有较高的品质因数，同时兼具适中的介电常数，并且制备工艺简单，由其制作研发的微波介质器件具有广泛的应用前景。
High-Q-value lithium titanate-based microwave dielectric ceramic material and preparation method thereof
一种高Q值钛酸锂基微波介质陶瓷材料及其制备方法
LI LINGXIA (Autor:in) / ZHAN YU (Autor:in) / DU MINGKUN (Autor:in) / NI LIZHENG (Autor:in)
27.08.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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