Embodiment
Below in conjunction with specific embodiment, the present invention is further explained, but is not limited to these embodiments.
Of the present invention adopted raw materials of Ca CO
3, Li
2cO
3, Sr
2o
3and TiO
2purity reach more than 99.9%, measure its dielectric properties (i.e. DIELECTRIC CONSTANT ε with network vector analyser
r, quality factor q × f, temperature coefficient of resonance frequency τ
f).After tested, each component content of the specific embodiment of the invention 1 ~ 16 and dielectric properties thereof, in table 1:
Each component content of table 1 specific embodiment of the invention and dielectric properties thereof
Sequence number |
a |
b |
ε
r |
Q |
τ
f(ppm/℃)
|
Embodiment 1 |
0.7 |
0.3 |
104 |
5756 |
13 |
Embodiment 2 |
0.6 |
0.4 |
105 |
5821 |
12 |
Embodiment 3 |
0.5 |
0.5 |
103 |
5943 |
3 |
Embodiment 4 |
0.4 |
0.6 |
106 |
5689 |
-4 |
Embodiment 5 |
0.7 |
0.3 |
108 |
6431 |
14 |
Embodiment 6 |
0.6 |
0.4 |
110 |
6200 |
12 |
Embodiment 7 |
0.5 |
0.5 |
107 |
6013 |
2 |
Embodiment 8 |
0.4 |
0.6 |
112 |
6321 |
-3 |
Embodiment 9 |
0.7 |
0.3 |
108 |
6355 |
15 |
Embodiment 10 |
0.6 |
0.4 |
107 |
6251 |
10 |
Embodiment 11 |
0.5 |
0.5 |
109 |
6302 |
5 |
Embodiment 12 |
0.4 |
0.6 |
111 |
5899 |
-5 |
Embodiment 13 |
0.7 |
0.3 |
109 |
6408 |
15 |
Embodiment 14 |
0.6 |
0.4 |
108 |
6100 |
11 |
Embodiment 15 |
0.5 |
0.5 |
110 |
5980 |
6 |
Embodiment 16 |
0.4 |
0.6 |
107 |
5807 |
-3 |
Table 1 demonstrates high-permittivity microwave medium ceramics provided by the invention, presents good microwave dielectric property: high specific inductivity, low-loss, close to the temperature coefficient of resonance frequency of zero.
Embodiment 1
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.7 (Ca
0.5sr
1/3) TiO
3-0.3Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1050 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1200 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 2
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.6 (Ca
0.5sr
1/3) TiO
3-0.4Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 4 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1100 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1200 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 3
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.5 (Ca
0.5sr
1/3) TiO
3-0.5Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 2 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1050 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1200 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, and then for the test of microwave dielectric property etc., its stereoscan photograph is shown in Fig. 2.
Embodiment 4
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.4 (Ca
0.5sr
1/3) TiO
3-0.6Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1100 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1200 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 5
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.7 (Ca
0.5sr
1/3) TiO
3-0.3Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1050 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 6% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1230 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 6
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.6 (Ca
0.5sr
1/3) TiO
3-0.4Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1050 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 6% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 2 hours 1230 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 7
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.5 (Ca
0.5sr
1/3) TiO
3-0.5Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1050 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 6% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1230 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 8
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.4 (Ca
0.5sr
1/3) TiO
3-0.6Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1100 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 6% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1230 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 9
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.7 (Ca
0.5sr
1/3) TiO
3-0.3Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1100 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 7% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1260 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 10
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.6 (Ca
0.5sr
1/3) TiO
3-0.4Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1100 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 7% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1260 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 11
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.5 (Ca
0.5sr
1/3) TiO
3-0.5Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1100 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 7% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1260 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 12
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.4 (Ca
0.5sr
1/3) TiO
3-0.6Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1100 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 7% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1260 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 13
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.7 (Ca
0.5sr
1/3) TiO
3-0.3Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 3 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1070 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1300 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 14
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.6 (Ca
0.5sr
1/3) TiO
3-0.4Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 2 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1070 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1300 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 15
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.5 (Ca
0.5sr
1/3) TiO
3-0.5Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 2 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1050 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1300 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.
Embodiment 16
Preparation method's concrete steps of high-permittivity microwave medium ceramics of the present invention are as follows:
(1) with CaCO
3, Li
2cO
3, Sr
2o
3and TiO
2for raw material, according to expression formula 0.4 (Ca
0.5sr
1/3) TiO
3-0.6Li
0.5sr
0.5tiO
3carrying out proportioning, is that medium carries out ball milling with dehydrated alcohol, within 2 hours, carries out pre-burning, pre-burning gained powder is carried out secondary ball milling after oven dry 1080 DEG C of insulations, dries, and obtains drying a point powder;
(2) to dry in powder add 5% PVA (polyvinyl alcohol) as caking agent and granulation, sieve, dry, and then forming machine is pressed into cylindric base substrate, cylindric for gained base substrate is sintered into porcelain in 3 hours 1300 DEG C of insulations.Two-sided for the porcelain of gained sanding and polishing is kept two-sided parallel, then for the test of microwave dielectric property etc.