Titanium dioxide-based composite ceramic dielectric material and its preparation method and application
A technology of titanium dioxide and composite ceramics, which is applied in the field of composite ceramic materials, can solve the problems that the comprehensive dielectric properties of titanium dioxide ceramics and strontium titanate ceramics are unfavorable for practical application, and achieves enhancement of electric field resistance strength Eb, enhancement of electric field resistance strength, and abnormal suppression. effect of growth
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Embodiment 1
[0034] A titanium dioxide-based composite ceramic dielectric material, the chemical formula is as follows:
[0035] 0.15SrTiO 3 ―0.85 (In 0.50 ,Nb 0.50 ) 0.01 (TiO 2 ) 0.99 .
[0036] The preparation method of the above-mentioned titanium dioxide-based composite ceramic dielectric material adopts carbonate SrCO of analytical purity respectively. 3 (99.0%), oxide TiO 2 (99.8%), In 2 o 3 (99.0%) and Nb 2 o 5 (99.8%) as a raw material, a titanium dioxide-based composite ceramic sample was prepared using a traditional solid-state reaction process, the steps are as follows:
[0037] (1) Chemical expression of SrTiO by composition 3 The stoichiometric ratio of SrCO 3 and TiO 2 , after mixing, it is ball milled and dried, and then pre-fired at 1250°C for 3 hours to make the raw materials fully react; then ball milled and dried to obtain SrTiO 3 ceramic powder;
[0038] (2) Chemical expression by composition (In 0.50 ,Nb 0.50 ) 0.01 (TiO 2 ) 0.99 The stoichiometri...
Embodiment 2
[0042] A titanium dioxide-based composite ceramic dielectric material, the chemical formula is as follows:
[0043] 0.15SrTiO 3 ―0.85 (In 0.50 ,Nb 0.50 ) 0.01 (TiO 2 ) 0.99 .
[0044] The preparation method is as described in Example 1, except that the sintering time in step (4) is 10 h.
Embodiment 3
[0046] A titanium dioxide-based composite ceramic dielectric material, the chemical formula is as follows:
[0047] 0.05SrTiO 3 ―0.95 (In 0.50 ,Nb 0.50 ) 0.01 (TiO 2 ) 0.99 .
[0048] The preparation method is as described in Example 1, except that the ratio of raw materials is different.
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