Functional Materials

High Purity Titanium Dioxide, CR-EL/PT Series

The technology of electronics has shown very remarkable progress and electronic devices such as cellular phones and personal computers have become more and more popular. High performance, high accuracy and the miniaturization of those electronic devices have been eagerly required.
ISK has supplied high-purity titanium dioxides as raw materials of ceramic capacitors, noise filters and so on which are used in those electronics devices.

Strengths

1. Strength 1
   A wide variety of purity and particle size
2. Strength 2
   Narrow particle size distribution
3. Strength 3
   We have newly added a line of high-purity and small-particle-size grades for next-generation products.

Typical Applications

• Raw material for dielectric materials (barium titanate, lead zirconium titanate, etc.) used in electronic ceramics such as capacitors, piezoelectric elements, and thermistors
• Raw material for titanium nitride and other non-oxide ceramics used as structural materials
• Raw material for rutile single crystals used for artificial precious stones and optical communication actuators

Properties of High-Purity Titanium Dioxide, CR-EL and PT series

• Various grades depending on purity and particle size.(Click here for Grade List)
• Narrow particle size distribution achieved using pigment synthesis technology
• We have newly added a line of high-purity and small-particle-size grades for next-generation products (PT-401M).
• For general-purpose applications, the PT-501R is suitable.

Grade Classification by Particle Size and Purity

Fig. 1 Relationship between particle size and thermal shrinkage

As in this figure, titanium dioxide grades with higher purity and/or smaller particle size start to shrink at relatively lower temperature.
Thus the purer and smaller grades can be expected to show higher reactivity in the synthesis of complex oxides such as barium titanate.

Grade List

ISK's high-purity titanium dioxide offers exceptionally high purity and stable quality. It is used in a wide range of applications, including electronic ceramics.

Available Particle Sizes and Purity Levels

*You can see the entire image in the figure by scrolling horizontally.

Particle Size	Crystal Form	TiO2 (%)	Grade Name	Electron Micrograph	Remarks
Middle	Rutile	99	PT-501R (0.18µm)		Sulfate Process PT-501R is suitable for conventional applications such as disc capacitors and PTC ceramics.
		99.9	CR-EL (0.25µm)		Chloride Process CR-EL is the most popular grade as a raw material for MLCC applications.
Small	Rutile	99.99	PT-401L (0.13µm)		Chloride Process These grades have smaller particle sizes than CR-EL, which are suitable for downsizing of the electronic devices.
			PT-401M (0.07µm)
Very Small	Anatase	99.9	PT-601A		Special Hydrolysis PT-601A is a fine titanium dioxide particle for electronic ceramics with anatase form, high purity, and excellent reactivity.
			Under development		Special Hydrolysis It is a fine titanium dioxide particle for electronic ceramics with anatase form, high purity, and excellent dispersibility in liquid phase.

CR-EL

CR-EL is ISK's standard grade manufactured by the chloride process.
The particle size of this grade is ca. 0.25µm which is the same size as conventional white pigment.
CR-EL shows excellent dispersibility and reactivity. Moreover, consistency of the quality has been achieved, which has made it suitable for electronic ceramic applications.

Basic physical properties (analysis examples)

		CR-EL
TiO2(%)*		99.97
Rutile ratio (%)		99.1
Specific surface area (m2/g)		6.8
Average particle size (µm)		0.25
Impurities (%)	Fe2O3	0.0031
	Al2O3	0.006
	SiO2	0.013
	Nb2O5	0.000
	Na2O	0.002
Moisture (%)		0.09
Ignition loss(%)		0.13

* TiO₂(%)=(100-Total impurities(%))
Ignition loss, SO₃, Cl and C are not taken into account in the above calculation.

PT-401M

PT-401M is a high-purity titanium dioxide with small particle size, which is manufactured by the chloride process.
This grade shows as excellent dispersibility and reactivity as CR-EL, and it is suitable for electronic ceramic applications which especially require fine particles.

Basic physical properties (analysis examples)

		PT-401M	CR-EL
TiO2(%)*		99.99	99.97
Rutile ratio (%)		46.7	99.1
Specific surface area (m2/g)		20.5	6.8
Average particle size (µm)		0.07	0.25
Impurities (%)	Fe2O3	0.0026	0.0031
	Al2O3	0.003	0.006
	SiO2	0.000	0.013
	Nb2O5	0.001	0.000
	Na2O	0.001	0.002
Moisture (%)		0.41	0.09
Ignition loss(%)		0.65	0.13

* TiO₂(%)=(100-Total impurities(%))
Ignition loss, SO₃, Cl and C are not taken into account in the above calculation.

PT-501R

PT-501R is high-purity titanium dioxide manufactured by the sulfate process.
PT-501R is rutile in the crystal form.
There is suitable for various applications such as ceramic capacitors due to the narrow particle size distribution.

Basic physical properties (analysis examples)

		PT-501R
TiO2(%)*		99.74
Rutile ratio (%)		92.4
Specific surface area (m2/g）		8.9
Average particle size (µm)		0.18
Impurities (%)	Fe2O3	0.0039
	Al2O3	0.002
	SiO2	0.000
	Nb2O5	0.14
	Na2O	0.001
Moisture (%)		0.18
Ignition loss(%)		0.31

* TiO₂(%)=(100-Total impurities(%))
Ignition loss, SO₃, Cl and C are not taken into account in the above calculation.

PT-601A

PT-601A is high-purity titanium dioxide manufactured by special hydrolysis process, and has a high specific surface area more than 300 m²/g on BET method, making it suitable for applications in electronic materials that require high purity and reactivity.

Basic physical properties (analysis examples)

		PT-601A
TiO2(%)*		99.9
Crystal form		Anatase
Specific surface area (m2/g)		343
Impurities (%)	Fe2O3	0.0002
	Al2O3	0.004
	SiO2	0.006
	Nb2O3	0.003
	Na2O	0.00000
Moisture (%)		3.48
Ignition loss(%)		6.57

* TiO₂(%)=(100-Total impurities(%))
Moisture, Ignition loss, SO₃, Cl and C are not taken into account in the above calculation.