Boron aluminum silicate mineral material, low temperature co-fired ceramic composite material, low temperature co-fired ceramic, composite substrate and preparation methods thereof
The present invention relates to a boroaluminosilicate mineral material, a low temperature co-fired ceramic composite material, a low temperature co-fired ceramic, a composite substrate and preparation methods thereof. A boroaluminosilicate mineral material for a low temperature co-fired ceramic, the boroaluminosilicate mineral material comprises the following components expressed in mass percentages of the following oxides: 0.41%-1.15% of Na2O, 14.15%-23.67% of K2O, 1.17%-4.10% of CaO, 0-2.56% of Al2O3, 13.19%-20.00% of B 2 O 3 , and 53.47%-67.17% of SiO 2 . The aforementioned boroaluminosilicate mineral material is chemically stable; a low temperature co-fired ceramic prepared from it not only has excellent dielectric properties, but also has a low sintering temperature, a low thermal expansion coefficient, and high insulation resistance; it is also well-matched with the LTCC process and can be widely used in the field of LTCC package substrates.
1. A boroaluminosilicate mineral material for a low temperature co-fired ceramic, wherein the boroaluminosilicate mineral material consists of the following components expressed in mass percentages of the following oxides:
Na 2 O
0.41%-1.15%;
K 2 O
14.15%-23.67%;
CaO
1.17%-4.10%;
Al 2 O 3
0-2.56%;
B 2 O 3
13.19%-20.00%;
SiO 2
53.47%-67.17%.
2. The boroaluminosilicate mineral material according to claim 1 , wherein it consists of the following components:
Na 2 O
0.62%-0.98%;
K 2 O
14.96%-22.80%;
CaO
1.82%-4.10%%;
Al 2 O 3
0-2.22%;
B 2 O 3
14.87%-18.33%%;
SiO 2
53.47%-67.17%.
3. A low temperature co-fired ceramic composite material, wherein the low temperature co-fired ceramic composite material comprises, in mass percentage, 35% to 65% of Al 2 O 3 and 35% to 65% of the boroaluminosilicate mineral material according to claim 1 .
4. The low temperature co-fired ceramic composite material according to claim 3 , wherein the low temperature co-fired ceramic composite material comprises 41.69% to 62.53% of Al 2 O 3 and 37.47% to 58.31% of the boroaluminosilicate mineral material.
5. A method for preparing a boroaluminosilicate mineral material, wherein it comprises the following steps:
weighing a sodium source, a potassium source, a calcium source, an aluminum source, a boron source, and a silicon source according to a ratio of elements of the boroaluminosilicate mineral material according to claim 1 ; mixing and grinding to obtain a boroaluminosilicate mineral grinding slurry;
subjecting the boroaluminosilicate mineral grinding slurry to a drying process to obtain a dry powder;
adding a binder to the dry powder and mixing thoroughly to obtain a mixed powder; and
calcinating the mixed powder at 700° C. to 850° C. to obtain the boroaluminosilicate mineral material.
6. The method for preparing a boroaluminosilicate mineral material according to claim 5 , wherein the grinding is ball milling and a ball-milling medium is absolute ethanol.
7. The method for preparing a boroaluminosilicate mineral material according to claim 5 , characterized in that the grinding takes from 2 h to 8 h.
8. The method for preparing a boroaluminosilicate mineral material according to claim 5 , wherein the drying process is oven-drying, a temperature for the drying process is from 70° C. to 100° C.
9. The method for preparing a boroaluminosilicate mineral material according to claim 5 , wherein the binder is selected from at least one of polyvinyl alcohol and polyvinyl butyral.
10. The method for preparing a boroaluminosilicate mineral material according to claim 5 , wherein the step of calcinating the mixed powder at 700° C. to 850° C. specifically comprises placing the mixed powder in a muffle furnace and calcinating in the air for 1 h to 5 h.
11. A method for preparing a low temperature co-fired ceramic composite material, wherein it comprises the following steps:
mixing the following components expressed in mass percentage: 35%-65% of Al 2 O 3 and 35%-65% of the boroaluminosilicate mineral material according to claim 1 , followed by grinding to obtain a mixed grinding slurry;
drying the mixed grinding slurry to obtain the low temperature co-fired ceramic composite material.
12. A method for preparing a low temperature co-fired ceramic, wherein it comprises the following steps:
adding a binder to the low temperature co-fired ceramic composite material according to claim 3 , mixing to obtain a ceramic powder;
keeping the ceramic powder at 500° C. to 600° C. for 2 h to 3 h for debinding; and
sintering the ceramic powder after the debinding at 850° C. to 950° C. to obtain the low temperature co-fired ceramic.
13. A low temperature co-fired ceramic composite material, wherein the low temperature co-fired ceramic composite material comprises, in mass percentage, 35% to 65% of Al 2 O 3 and 35% to 65% of the boroaluminosilicate mineral material according to claim 2 .
14. A method for preparing a low temperature co-fired ceramic composite material, wherein it comprises the following steps:
mixing the following components expressed in mass percentage: 35%-65% of Al 2 O 3 and 35%-65% of the boroaluminosilicate mineral material according to claim 2 , followed by grinding to obtain a mixed grinding slurry;
drying the mixed grinding slurry to obtain the low temperature co-fired ceramic composite material.
15. A method for preparing a low temperature co-fired ceramic, wherein it comprises the following steps:
adding a binder to the low temperature co-fired ceramic composite material according to claim 4 , mixing to obtain a ceramic powder;
keeping the ceramic powder at 500° C. to 600° C. for 2 h to 3 h for debinding; and
sintering the ceramic powder after the debinding at 850° C. to 950° C. to obtain the low temperature co-fired ceramic.