China Ceramic Alumina Tube manufacturer

Machinery Al2O3 Precision Ceramic Components Low Thermal Conductivity

Product Details:
Place of Origin: China
Brand Name: Jinghui Ceramics
Certification: RoHS, REACH, ISO
Model Number: JH.ZRCP.001
Payment & Shipping Terms:
Minimum Order Quantity: 100 piece per order
Price: Negotiable
Packaging Details: Bags with export carton
Delivery Time: 5~6 weeks
Payment Terms: T/T, Western Union, MoneyGram, Paypal, , L/C
Supply Ability: 100000 sets per month

Detail Information

Product Name: High Precision Alumina Ceramic Washer Material: 99% Alumina
Type: Advanced Ceramic Parts Color: Ivory
Size: 50mm X 200mm Feature: High Accuracy, Low Thermal Conductivity
Tolerance: As Design Drawing Or OEM Shape: Customized Designs
Surface Treatment: Diamond-polished Application: Industrial Ceramic
High Light:

ceramic insulators


advanced industrial ceramics

Product Description

Well Polished Precision 99% Al2O3 Alumina Ceramic Washer for Industry

Specification of the ceramic washer:

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 alumina ceramic washer :

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


Description of high precision alumina ceramic parts:

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. 


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.

Machinery Al2O3 Precision Ceramic Components Low Thermal Conductivity 0  Machinery Al2O3 Precision Ceramic Components Low Thermal Conductivity 1   Machinery Al2O3 Precision Ceramic Components Low Thermal Conductivity 2


Datasheet of Technical ceramics

Property Units Material
99.5% alumina 99%alumina 95% alumina ZrO2



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
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          
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.

Machinery Al2O3 Precision Ceramic Components Low Thermal Conductivity 3



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.


Machinery Al2O3 Precision Ceramic Components Low Thermal Conductivity 4

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.

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