Industrial Fine Grinding 99% Aluminum Oxide / Alumina Ceramic Part Insulator
Description of high precision alumina ceramic parts insulator:
Aluminum oxide is known as alumina that is the most widely applied and cost effective technical ceramic material. It offers a combination of superior wears resistance and corrosion resistance, mechanical strength and electrical properties, high-temperature resistance. The maximum working temperature is up to 2000 °C under a vacuum atmosphere with relatively high thermal conductivity. It is also an electrically insulating material with a high electrical resistivity. The good corrosion resistance makes it insoluble in water and slightly soluble in strong acid and alkaline solution.
Jinghui produces numerous ceramic parts in different grade alumina ranges from 95% to 99.8%. All these sintered dense alumina ceramic parts can be machined / ground by diamond tools when customers ask for a tight tolerance for precision fitting.
When you have any technical ceramic prototyping or manufacturing needs, we are happy to make use of our many years of experience and knowledge to provide you some solution.
Specification of the high precision ceramic insulator:
1. Type of ceramic parts: ceramic tube, ceramic ring, ceramic rod, ceramic housing, ceramic washer, ceramic frame
2. Material options: 95~99.8% alumina(Al2O3), Zirconia (ZrO2), Silicon carbide (SiC), Silicon nitride (Si3N4)
3. Forming method: Dry pressed, Ceramic injection molding, ISO pressed and Hot pressed, Extrusion and so on
4. Specification: Available outer from 1mm to 500mm, available length from 10mm to 1000mm
5. Tolerance: dimensions less than 100mm with 0.005mm, greater than 100mm with 0.01mm
6. Surface treatment: polishing to be diamond-like surface, glazing, metallizing for ceramic to metal bonding
Prime features of high precision alumina ceramic insulator :
1. Chemical inertness, resistant most of the strong acid and alkali, and does not rust forever
2. Wear & abrasion resistance: Alumina is extreme hard technical ceramic with superb wear resistance
3. High-temperature ability: withstand up to 1650°C in oxidizing and reducing atmospheres
4. Electrical insulation: The insulation breakdown is up to 18KV at least
5. Great mechanical properties, hardness, compressive and flexural strength are much higher stainless steel
6. Protective atmospheres or high vacuum at high-temperature to eliminate contamination or impurity.
7. Low material cost in high-level applications than other technical ceramics
The application of alumina ceramic parts:
Due to high purity alumina versatile characteristics, high precision alumina ceramic parts are widely used as ceramic mechanical seals, ceramic semiconductor parts, ceramic machine components, electrical ceramic insulators, ceramic waveguides, ceramic measuring components, fiber optical application.
Gallery of alumina ceramic parts
We produce various different grade alumina ceramic parts with complicated design.
Datasheet of Technical ceramics
| Property | Units | Material |
| 99.5% alumina | 99%alumina | 95% alumina | ZrO2
(Y-TZP) | ZrO2 (TTZ) |
| Density | g/cm3 | ≥3.85 | ≥3.80 | ≥3.60 | ≥5.95 | ≥5.72 |
| Water absorption | % | 0 | 0 | 0 | 0 | 0 |
| Hardness | HV | 1700 | 1700 | 1500 | 1300 | 900 |
| Flexural strength | Mpa | ≥379 | ≥338 | ≥320 | ≥1200 | ≥1200 |
| Compressive strength | Mpa | ≥2240 | ≥2240 | ≥2000 | ≥1990 | 1750 |
| Fracture toughness | Mpa m1/2 | 4-5 | 4-5 | 3-4 | 6.5-8 | 11 |
Max. service
temperature | ℃ | 1675 | 1600 | 1450 | 1000 | |
| CTE | 1×10 -6 /℃ | 6.5~8.0 | 6.2~8.0 | 5.0~8.0 | 8.0~9.5 | 10.2 |
| Thermal shock | T(℃) | ≥250 | ≥200 | ≥220 | ≥300 | 350 |
| Thermal conductivity(25℃) | W/m.k | 30 | 29 | 24 | 3 | 3 |
| Volume resistivity | ohm.cm | | | | | |
| 25℃ | ＞1 x 10 14 | ＞1 x 10 14 | ＞1 x 10 14 | ＞1 x 10 11 | ＞1 x 10 11 |
| 300℃ | 1 x 10 12 | 8 x 10 11 | 10 12 -10 13 | 1 x 10 10 | 1 x 10 10 |
| 500℃ | 5 x 10 10 | 2 x 10 9 | 1 x 10 9 | 1 x 10 6 | 1 x 10 6 |
| Insulation strength | KV/mm | 19 | 18 | 18 | 17 | 20 |
| Dielectric constant(1Mhz) | (E) | 9.7 | 9.5 | 9.5 | 29 | 28 |
Manufacturing flow chart of technical ceramic parts
We have in-housing comprehensive manufacturing types of equipment, including forming, sintering, CNC machining,
precision grinding, laser cutting and so on, it helps us to control the quality very well, also it greatly benefits cost control.
Packaging proposal and transportation solutions
1. We will keep the ceramic parts inside the inner package to be fixed without moving, then it will prevent them from collision each other,
to avoid any cause any chippings during transportation.
2. In addition, the inside of the outer carton will be filled with sufficient protective kinds of stuff.
Why choose us?
★ 10+ Years of manufacturing experience in OEM, ODM ★ Powerful R&D, mass production capability
★ In-house comprehensive manufacturing types of equipment ★ Rigorous quality control system and processes
★ Surpassing pre-sales and after-sales service ★ Abide all orders as the first priority
FAQs(Frequently asked questions)
Q1. Are you a factory or trading company?
A: We are a manufacturer. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the sample is free and freight collect.
Q3: When will you ship it?
A: If the products are in storage, we'll ship within 48 hours
Q4: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price.
Please call us or tell us in your email so that we will proceed with your inquiry as a priority.
Q5: Is it available to provide customized products?
A: We always support custom-made demand as per different materials, dimensions, and designs.
Q6: How to ensure quality?
A: The dimension out of any batch will be carried out sampling inspection per international AQL standard. A 100% cosmetic inspection will be done.
Q7: What other products are you dealing with?
A: We focus on a variety of ceramic tubes, ceramic substrates, ceramic sheets, textile ceramics besides metalized ceramics.
