What is the difference between 99 and 96 alumina ceramic substrate?

Time：202021-11-15

Ceramic substrates are widely used in electronic devices. Ceramic substrates have good insulation properties and high thermal conductivity. They are very important heat dissipation materials in many fields. Today I will share with alumina ceramic substrates 99% alumina and 96%. The difference between 99% and 96% alumina ceramic substrate.

1. Insulating ceramic substrate 95% 96% alumina

The ceramic substrate is also called an insulating ceramic substrate because of its insulation. Ceramic substrates are divided into alumina ceramic substrates and aluminum nitride ceramic substrates according to thermal conductivity. According to the proportion of purity, they are also divided into 95% alumina and 96% alumina. Usually in the alumina ceramic substrate, there is 95% alumina. 96% alumina, 99% alumina. The 95% alumina is advanced and reasonable in formula. It is sintered through a high-temperature electric kiln. It is automatically propelled. The sintering temperature is above 1600°C.... Its Rockwell hardness (HRA) can reach 85-90. It is used in thermal power plants. The wear resistance used in the milling system equipment is ten times or even dozens of times that of other wear-resistant materials. Compared with 96% alumina, the purity of the 96% alumina ceramic substrate is higher, and the thermal conductivity and electrical performance are also better.

2. What is the difference between 99% and 96% alumina?

The main composition of the alumina ceramic substrate is alumina, and pure alumina is a white amorphous powder, commonly known as alumina. Density 3.9-4.0g/cm3, melting point 2050℃, boiling point 2980℃, insoluble in water Ordinary alumina ceramics are divided into 99% alumina, 95% alumina, 90% alumina, 96% alumina according to the content of Al2O3 , 85% alumina and other varieties, sometimes Al2O3 content of 80% or 75% is also classified as ordinary alumina ceramic series. 99% alumina refers to 99.5% or 99.8% alumina, white or ivory color, abrasion resistance, acid and alkali corrosion resistance, high temperature resistance (1600-1700 degrees Celsius), good chemical stability, high insulation, and strong adsorption , Is a good electrical insulation and wear-resistant material. At present, it is widely used in lamps, electronic appliances, sandblasting nozzles, auto parts, wear-resistant parts, etc. 96 porcelain generally has a alumina content of 96%, which is lower in purity than 99% alumina, and is more cost-effective than 99% alumina. It has good thermal conductivity and insulation.

3. the characteristics of 96% alumina ceramics

(1) Good thermal conductivity

(2) Excellent mechanical strength

(3) Stable physical and chemical properties, corrosion resistance

(4) Excellent insulation performance,

(5) Smooth surface, small warpage

(6) Non-toxic, high reflectivity

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