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Preparation method of titanium dioxide-based ceramic with ultrahigh dielectric constant and low dielectric loss
The invention discloses a preparation method of a titanium dioxide-based ceramic with ultrahigh dielectric constant and low dielectric loss, which is characterized in that the titanium dioxide-based ceramic is prepared by adopting a hot pressing process, the nominal chemical formula of the titanium dioxide-based ceramic is (Lu<0.5>Nb<0.5>)Ti<1-x>O<2>, and the value range of x is 1.0%-2.0%. Thepreparation method comprises the following steps: (1) weighing rutile type TiO2, Lu2O3 and Nb2O5 powder according to the nominal chemical molecular formula (Lu<0.5>Nb<0.5>)Ti<1-x>O<2>, and carrying out ball milling and drying on the rutile type TiO2, Lu2O3 and Nb2O5 powder; and 2) presintering a dried powder, carrying out secondary ball milling, drying the obtained powder, and carrying out hotpressing for 0.5-1 h at a temperature of 1000-1100 DEG C under a pressure of 50 Mpa to obtain the titanium dioxide-based ceramic with an ultrahigh dielectric constant and low dielectric loss. The dielectric constant of the (Lu<0.5>Nb<0.5>)Ti<1-x>O<2> ceramic prepared by the invention is higher than 105 and the dielectric loss is less than 0.03 in a broadband range, and the dielectric propertyhas good temperature stability in a temperature range of -130 DEG C to 150 DEG C. The method is low in preparation temperature, short in construction period, simple in process, energy-saving, good inrepeatability and suitable for popularization and application.
本发明公开了一种超高介电常数低介电损耗的二氧化钛基陶瓷的制备方法，其特征在于，二氧化钛基陶瓷采用热压工艺制备，其名义化学分子式为(LuNb)TiO,其中，x的取值范围是1.0％～2.0％。其制备方法包括以下步骤：1)按照名义化学分子式(LuNb)TiO，称取金红石型TiO、LuO和NbO粉体，进行球磨、烘干；2)将烘干的粉体预烧，二次球磨，所得粉体烘干后，在50Mpa压强下，温度1000～1100℃，热压0.5‑1h，即可得到超高介电常数低介电损耗的二氧化钛基陶瓷。本发明制备的(LuNb)TiO陶瓷在宽频范围内，介电常数高于10，介电损耗小于0.03，在温度‑130～150℃范围内，介电性能具有良好的温度稳定性。本发明制备温度低、工期短，工艺简单、节能，重复性好，适合推广应用。
Preparation method of titanium dioxide-based ceramic with ultrahigh dielectric constant and low dielectric loss
The invention discloses a preparation method of a titanium dioxide-based ceramic with ultrahigh dielectric constant and low dielectric loss, which is characterized in that the titanium dioxide-based ceramic is prepared by adopting a hot pressing process, the nominal chemical formula of the titanium dioxide-based ceramic is (Lu<0.5>Nb<0.5>)Ti<1-x>O<2>, and the value range of x is 1.0%-2.0%. Thepreparation method comprises the following steps: (1) weighing rutile type TiO2, Lu2O3 and Nb2O5 powder according to the nominal chemical molecular formula (Lu<0.5>Nb<0.5>)Ti<1-x>O<2>, and carrying out ball milling and drying on the rutile type TiO2, Lu2O3 and Nb2O5 powder; and 2) presintering a dried powder, carrying out secondary ball milling, drying the obtained powder, and carrying out hotpressing for 0.5-1 h at a temperature of 1000-1100 DEG C under a pressure of 50 Mpa to obtain the titanium dioxide-based ceramic with an ultrahigh dielectric constant and low dielectric loss. The dielectric constant of the (Lu<0.5>Nb<0.5>)Ti<1-x>O<2> ceramic prepared by the invention is higher than 105 and the dielectric loss is less than 0.03 in a broadband range, and the dielectric propertyhas good temperature stability in a temperature range of -130 DEG C to 150 DEG C. The method is low in preparation temperature, short in construction period, simple in process, energy-saving, good inrepeatability and suitable for popularization and application.
本发明公开了一种超高介电常数低介电损耗的二氧化钛基陶瓷的制备方法，其特征在于，二氧化钛基陶瓷采用热压工艺制备，其名义化学分子式为(LuNb)TiO,其中，x的取值范围是1.0％～2.0％。其制备方法包括以下步骤：1)按照名义化学分子式(LuNb)TiO，称取金红石型TiO、LuO和NbO粉体，进行球磨、烘干；2)将烘干的粉体预烧，二次球磨，所得粉体烘干后，在50Mpa压强下，温度1000～1100℃，热压0.5‑1h，即可得到超高介电常数低介电损耗的二氧化钛基陶瓷。本发明制备的(LuNb)TiO陶瓷在宽频范围内，介电常数高于10，介电损耗小于0.03，在温度‑130～150℃范围内，介电性能具有良好的温度稳定性。本发明制备温度低、工期短，工艺简单、节能，重复性好，适合推广应用。
Preparation method of titanium dioxide-based ceramic with ultrahigh dielectric constant and low dielectric loss
一种超高介电常数低介电损耗的二氧化钛基陶瓷的制备方法
2020-05-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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