Method for reducing sintering temperature of calcium zirconate microwave dielectric ceramic
The invention discloses a method for reducing sintering temperature of calcium zirconate microwave dielectric ceramic. The method disclosed by the invention is a method in which the sintering temperature of CaZrO3 microwave dielectric ceramic is effectively reduced by adding proper Li2O-B2O3-SiO2 is added as a sintering aid so as to effectively reduce the sintering temperature of CaZrO3 microwave dielectric ceramic, realize electrode cofiring and keep an excellent microwave dielectric property. The method comprises the following steps: 1, preparing the Li2O-B2O3-SiO2 sintering aid; and 2, adding the Li2O-B2O3-SiO2 sintering aid to calcium zirconate base stock, carrying out ball milling, drying, baking, grinding, sieving, molding and sintering to obtain the CaZrO3 microwave dielectric ceramic. 1. A microwave zirconic acid calcium method for ceramics sintering temperature of the medium, characterized in that step one, Li2 O-B2 O3-SiO2 preparing the sintering aid, Li2 O, B2 O3, SiO2 make mixture, into the nylon ball milling pot, respectively according to Li2 O-B2 O3-SiO2 of the weight of the mixture 180-200% and 150-160% de-ionized water by adding zirconia pellets and as ball-milling additive, ball-milling in the planetary ball mill 8-12 hours, the rotational speed is 200-220r/min; good ball milling the mixed slurry in the drying box 120 the drying [...] 8 hours; the mixture of the drying after the agate tank grinding, the grinding after the mixed material 120 target filter; the screened mixture into the corundum crucible, then are placed in a muffle furnace in the 3-5 [...] /min heating rate of rise of temperature to 800-950 the insulation after [...] 30-60min; by melting the thermal insulation through the molten mixture rapidly after the deionized water, get the original Li2 O-B2 O3-SiO2 glass material; will be the original glass material according to the weight of the respectively 180-200% and 150-160% by adding zirconia pellet and anhydrous ethanol as ball-milling additive, on the ball of the ball mill 60-90min, crushing, the rotational speed is 1200r/min; good ball milling in the glass paste as regards drying box 120 the drying [...] 8 hours; the dried glass material after the agate tank grinding, the grinding after the mixed material 200 target filter to, obtain a homogeneous Li2 O-B2 O3-SiO2 sintering aid; Stated, in parts by weight to 100% zirconic acid calcium in the base material of, adding Li2 O-B2 O3-SiO2 sintering aid, is put into the nylon ball grinding tank, the weight of the base material according to the respectively zirconic acid calcium 180-200% and 150-160% by adding zirconia pellet and anhydrous ethanol as ball-milling additive, ball-milling in the planetary ball mill 8-12 hours, the rotational speed is 200-220r/min; good ball milling in the mixed slurry put into a drying box 120 the drying [...] 8 hours; the mixture of the drying after the agate tank grinding, the grinding after the mixed material 120 target filter to, obtain a homogeneous CaZrO3 ceramic powder; in the obtained ceramic powder add weight percentage is 6-8% adhesive granulate, too 60-80 mesh; and then formed into a green body with the sheeter; unbaked and unglazed pottery piece in the press forming of the 800-950 the [...][...] sintering, thermal insulation 2-4 hours, make CaZrO3 microwave dielectric ceramic. 2. A microwave dielectric zirconic acid calcium method of ceramic sintering temperature according to Claim 1, characterized in that Li2 O, B2 O3, SiO2 the ratio of 7:1:2 . 3. A microwave dielectric zirconic acid calcium method of ceramic sintering temperature according to Claim 1, characterized in that in the parts by weight to 100% of the in the base material zirconic acid calcium , of the total weight of the base material to calcium occupies the zirconium 3-12% of Li2 O-B2 O3-SiO2 sintering aid. 4. A microwave dielectric zirconic acid calcium method of ceramic sintering temperature according to Claim 1, characterized in that in the parts by weight to 100% of the in the base material zirconic acid calcium , calcium occupies the zirconium of the total weight of the base material to 9% the Li2 O-B2 O3-SiO2 sintering aid. 5. A microwave dielectric zirconic acid calcium method of ceramic sintering temperature according to Claim 1, characterized in that the adhesive is polyvinyl alcohol.